SQ24 Series Data Sheet The new SemiQTM Family of DC/DC converters from di/dt provides a high efficiency single output in a size that is only 60% of industry-standard quarter bricks, while preserving the same pinout and functionality. In high temperature environments, for output voltages ranging from 3.3V to 1.0V, the thermal performance of SemiQTM converters exceeds that of most competitors' 20-30A quarter bricks. This is accomplished through the use of patent pending circuit, packaging and processing techniques to achieve ultra-high efficiency, excellent thermal management and a very low body profile. Low body profile and the preclusion of heat sinks minimize airflow shadowing, thus enhancing cooling for downstream devices. The use of 100% automation for assembly, coupled with di/dt's advanced electric and thermal design, results in a product with extremely high reliability. Operating from a 18-36V input, the SQ24 Series converters of the SemiQTM Family provides any standard output voltage from 12V down to 1.0V. Outputs can be trimmed from - 20% to +10% of the nominal output voltage (10% for output voltages 1.2V and 1.0V), thus providing outstanding design flexibility. With a standard pinout and trim equations, the SQ24 Series converters are perfect drop-in replacements for existing quarter brick designs. Inclusion of this converter in new designs can result in significant board space and cost savings. The device is also available in a surface mount package. In both cases the designer can expect reliability improvement over other available converters because of the SQ24 Series' optimized thermal efficiency. Applications * Telecommunications * Datacommunications * Wireless * Servers SQ24 Family DS Ver 5 05-14-04 SQ24T and SQ24S Converters Features * * * * * * * * * * * * * * * * * * * * * Delivers up to 15A (50 W) Available in through-hole and SM packages Lowest weight in industry: 0.53 oz (15 g) Lowest profile in industry: 0.274" (6.96 mm) Extremely small footprint: 0.896" x 2.30" (2.06 in2) Outputs available in 12.0, 8.0, 6.0, 5.0, 3.3, 2.5, 2.0, 1.8, 1.5, 1.2 and 1.0V High efficiency - no heat sink required On-board input differential LC-filter Extremely low output and input ripple Start up into pre-biased output No minimum load required Meets Basic Insulation requirements of EN60950 Fixed frequency operation Fully protected Remote output sense Output voltage trim range: +10%/-20% (except 1.2V and 1.0V outputs with trim range 10%) with industrystandard trim equations High reliability: MTBF of 3.4 million hours, calculated per Telcordia TR-332, Method I Case 1 Positive or negative logic ON/OFF option UL 60950 recognition in US and Canada and DEMKO certification per IEC/EN 60950 Meets conducted emissions requirements of FCC Class B and EN 55022 Class B with external filter All materials meet UL94, V-0 flammability rating USA Toll Free 866 WOW-didt Page 1 of 70 SQ24 Series Data Sheet Electrical Specifications (common to all versions) Conditions: TA=25C, Airflow=300 LFM (1.5 m/s), Vin=24Vdc, All output voltages, unless otherwise specified. PARAMETER ABSOLUTE MAXIMUM RATINGS Input Voltage Operating Ambient Temperature Storage Temperature NOTES Continuous MIN TYP 0 -40 -55 MAX UNITS 40 85 125 Vdc C C INPUT CHARACTERISTICS Operating Input Voltage Range Input Under Voltage Lockout Turn-on Threshold Turn-off Threshold 18 24 36 Vdc 16 15 17 16 17.5 16.5 Vdc Vdc Non-latching ISOLATION CHARACTERISTICS I/O Isolation Isolation Capacitance: 2000 1.0 - 3.3V 5.0 - 6.0V 8.0V, 12V Isolation Resistance Vdc pF pF pF M 160 260 230 10 FEATURE CHARACTERISTICS Switching Frequency 1 Output Voltage Trim Range 415 1 Remote Sense Compensation Output Over-Voltage Protection Auto-Restart Period Turn-On Time ON/OFF Control (Positive Logic) Converter Off Converter On ON/OFF Control (Negative Logic) Converter Off Converter On Industry-std. equations (1.5 - 12V) Industry-std. equations (1.0 - 1.2V) Percent of VOUT(NOM) Non-latching (1.5 - 12V) Non-latching (1.0 - 1.2V) Applies to all protection features -20 -10 117 124 125 132 100 4 +10 +10 +10 140 140 kHz % % % % % ms ms -20 2.4 0.8 20 Vdc Vdc 2.4 -20 20 0.8 Vdc Vdc Additional Notes: 1. Vout can be increased up to 10% via the sense leads or up to 10% via the trim function, however total output voltage trim from all sources should not exceed 10% of VOUT(NOM), in order to insure specified operation of over-voltage protection circuitry. See "Output Voltage Adjust/Trim" for detailed information. SQ24 Family DS Ver 5 05-14-04 USA Toll Free 866 WOW-didt Page 2 of 70 SQ24 Series Data Sheet Operation Input and Output Impedance These power converters have been designed to be stable with no external capacitors when used in low inductance input and output circuits. However, in many applications, the inductance associated with the distribution from the power source to the input of the converter can affect the stability of the converter. The addition of a 100F electrolytic capacitor with an ESR < 1 across the input helps ensure stability of the converter. In many applications, the user has to use decoupling capacitance at the load. The power converter will exhibit stable operation with external load capacitance up to 1000F on 12V, 2,200F on 8.0V, 10,000 F on 5.0V - 6.0V, and 15,000F on 3.3V - 1.0V outputs. be used to drive the input of the ON/OFF pin. The device must be capable of sinking up to 0.2mA at a low level voltage of 0.8V. An external voltage source (20V maximum) may be connected directly to the ON/OFF input, in which case it must be capable of sourcing or sinking up to 1mA depending on the signal polarity. See the Start-up Information section for system timing waveforms associated with use of the ON/OFF pin. Remote Sense (Pins 5 and 7) The remote sense feature of the converter compensates for voltage drops occurring between the output pins of the converter and the load. The SENSE(-) (Pin 5) and SENSE(+) (Pin 7) pins should be connected at the load or at the point where regulation is required (see Fig. B). SemiQ Family TM ON/OFF (Pin 2) Vin (+) The ON/OFF pin is used to turn the power converter on or off remotely via a system signal. There are two remote control options available, positive logic and negative logic and both are referenced to Vin(-). Typical connections are shown in Fig. A. ON/OFF Converter (Top View) SemiQ Family Converter (Top View) ON/OFF Vin SENSE (+) TRIM Rload SENSE (-) 10 Vin (-) Vout (-) Rw Vout (+) SENSE (+) TRIM Rload SENSE (-) Vin (-) Rw 100 Fig. B: Remote sense circuit configuration. TM Vin (+) Vin Vout (+) Vout (-) CONTROL INPUT If remote sensing is not required, the SENSE(-) pin must be connected to the Vout(-) pin (Pin 4), and the SENSE(+) pin must be connected to the Vout(+) pin (Pin 8) to ensure the converter will regulate at the specified output voltage. If these connections are not made, the converter will deliver an output voltage that is slightly higher than the specified value. The positive logic version turns on when the ON/OFF pin is at logic high and turns off when at logic low. The converter is on when the ON/OFF pin is left open. Because the sense leads carry minimal current, large traces on the end-user board are not required. However, sense traces should be located close to a ground plane to minimize system noise and insure optimum performance. When wiring discretely, twisted pair wires should be used to connect the sense lines to the load to reduce susceptibility to noise. The negative logic version turns on when the pin is at logic low and turns off when the pin is at logic high. The ON/OFF pin can be hard wired directly to Vin(-) to enable automatic power up of the converter without the need of an external control signal. The converter's output over-voltage protection (OVP) senses the voltage across Vout(+) and Vout(-), and not across the sense lines, so the resistance (and resulting voltage drop) between the output pins of the converter and the load should be minimized to prevent unwanted triggering of the OVP. ON/OFF pin is internally pulled-up to 5 V through a resistor. A mechanical switch, open collector transistor, or FET can When utilizing the remote sense feature, care must be taken not to exceed the maximum allowable output power capabil- Fig. A: Circuit configuration for ON/OFF function. SQ24 Family DS Ver 5 05-14-04 USA Toll Free 866 WOW-didt Page 3 of 70 SQ24 Series Data Sheet ity of the converter, equal to the product of the nominal output voltage and the allowable output current for the given conditions. When using remote sense, the output voltage at the converter can be increased by as much as 10% above the nominal rating in order to maintain the required voltage across the load. Therefore, the designer must, if necessary, decrease the maximum current (originally obtained from the derating curves) by the same percentage to ensure the converter's actual output power remains at or below the maximum allowable output power. Output Voltage Adjust /TRIM (Pin 6) The converter's output voltage can be adjusted up 10% or down 20% for Vout 1.5V, and 10% for Vout = 1.2V and 1.0 V, relative to the rated output voltage by the addition of an externally connected resistor. For output voltages 3.3V, trim up to 10% is guaranteed only at Vin 20V, and it is marginal (8% to 10%) at Vin = 18V depending on load current. The TRIM pin should be left open if trimming is not being used. To minimize noise pickup, a 0.1 F capacitor is connected internally between the TRIM and SENSE(-) pins. To increase the output voltage, refer to Fig. C. A trim resistor, RT-INCR, should be connected between the TRIM (Pin 6) and SENSE(+) (Pin 7), with a value of: RT-INCR = RT-INCR 323 -2 TM Converter (Top View) Vin [k] (1.2V) Vout (+) SENSE (+) R T-INCR TRIM Vin (-) Vout (-) Fig. C: Configuration for increasing output voltage. To decrease the output voltage (Fig. D), a trim resistor, RT-DECR, should be connected between the TRIM (Pin 6) and SENSE(-) (Pin 5), with a value of: RT-DECR = 511 - 10.22 || [k] (1.0 - 12V) where, RT-DECR = Required value of trim-down resistor [k] and is as defined above. Note: The above equations for calculation of trim resistor values match those typically used in conventional industrystandard quarter bricks and one-eighth bricks. Converters with output voltage 1.2V and 1.0V have specific trim schematic and equations, to provide the customers with the flexibility of second sourcing. For these converters, the last character of part number is "T". More information about trim feature, including corresponding schematic portions, can be found in Application Note 103. SemiQ Family TM Vin (+) Converter ON/OFF Vin Vout (+) SENSE (+) TRIM SENSE (-) Vin (-) [k] (1.0V) Rload R T-DECR Vout (-) Fig. D: Configuration for decreasing output voltage. Trimming/sensing beyond 110% of the rated output voltage is not an acceptable design practice, as this condition could cause unwanted triggering of the output over-voltage protection (OVP) circuit. The designer should ensure that the difference between the voltages across the converter's output pins and its sense pins does not exceed 10% of VOUT(NOM), or: RT-INCR = Required value of trim-up resistor k] VO-NOM = Nominal value of output voltage [V] (VO-REQ - VO -NOM) X 100 [%] VO -NOM VO-REQ = Desired (trimmed) output voltage [V]. When trimming up, care must be taken not to exceed the converter`s maximum allowable output power. See previous section for a complete discussion of this requirement. SQ24 Family DS Ver 5 05-14-04 Rload SENSE (-) (Top View) where, = SemiQ Family ON/OFF 5.11(100 + )VO-NOM - 626 - 10.22 [k] (1.5 -12V) 1.225 485 = RT-INCR = Vin (+) [VOUT(+) - VOUT(-)] - [VSENSE(+) - VSENSE(-)] VO - NOM X 10% [V] This equation is applicable for any condition of output sensing and/or output trim. USA Toll Free 866 WOW-didt Page 4 of 70 SQ24 Series Data Sheet To comply with safety agencies requirements, an input line fuse must be used external to the converter. The Table below provides the recommended fuse rating for use with this family of products. Protection Features Input Under-Voltage Lockout Input under-voltage lockout is standard with this converter. The converter will shut down when the input voltage drops below a pre-determined voltage. The input voltage must be at least 17.5V for the converter to turn on. Once the converter has been turned on, it will shut off when the input voltage drops below 15V. This feature is beneficial in preventing deep discharging of batteries used in telecom applications. 3.3V 12V - 5.0V, 2.5V 2.0V - 1.0V Fuse Rating 8A 6A 4A If one input fuse is used for a group of modules, the maximum fuse rating should not exceed 15-A (SQ modules are UL approved with up to a 15-A fuse). Electromagnetic Compatibility (EMC) Output Over-Current Protection (OCP) The converter is protected against over-current or short circuit conditions. Upon sensing an over-current condition, the converter will switch to constant current operation and thereby begin to reduce output voltage. When the output voltage drops below 50% of the nominal value of output voltage, the converter will shut down. Once the converter has shut down, it will attempt to restart nominally every 100 ms with a typical 1-2% duty cycle. The attempted restart will continue indefinitely until the overload or short circuit conditions are removed or the output voltage rises above 50% of its nominal value. Output Over-Voltage Protection (OVP) The converter will shut down if the output voltage across Vout(+) (Pin 8) and Vout(-) (Pin 4) exceeds the threshold of the OVP circuitry. The OVP circuitry contains its own reference, independent of the output voltage regulation loop. Once the converter has shut down, it will attempt to restart every 100 ms until the OVP condition is removed. Over-Temperature Protection (OTP) The converter will shut down under an over-temperature condition to protect itself from overheating caused by operation outside the thermal derating curves, or operation in abnormal conditions such as system fan failure. After the converter has cooled to a safe operating temperature, it will automatically restart. Safety Requirements The converters meet North American and International safety regulatory requirements per UL60950 and EN60950. Basic Insulation is provided between input and output. SQ24 Family DS Ver 5 05-14-04 Output Voltage EMC requirements must be met at the end-product system level, as no specific standards dedicated to EMC characteristics of board mounted component dc-dc converters exist. However, di/dt tests its converters to several system level standards, primary of which is the more stringent EN55022, Information technology equipment - Radio disturbance characteristics - Limits and methods of measurement. With the addition of a simple external filter (see application notes), all versions of the SQ24 Series of converters pass the requirements of Class B conducted emissions per EN55022 and FCC, and meet at a minimum, Class A radiated emissions per EN 55022 and Class B per FCC Title 47CFR, Part 15-J. Please contact di/dt Applications Engineering for details of this testing. Characterization General Information The converter has been characterized for many operational aspects, to include thermal derating (maximum load current as a function of ambient temperature and airflow) for vertical and horizontal mounting, efficiency, start-up and shutdown parameters, output ripple and noise, transient response to load step-change, overload and short circuit. The figures are numbered as Fig. x.y, where x indicates the different output voltages, and y is associated with a specific plot (y = 1 for the vertical thermal derating, ...). For example, Fig. x.1 will refer to the vertical thermal derating for all the output voltages in general. The following pages contain specific plots or waveforms associated with the converter. Additional comments for specific data are provided below. USA Toll Free 866 WOW-didt Page 5 of 70 SQ24 Series Data Sheet Test Conditions All data presented were taken with the converter soldered to a test board, specifically a 0.060" thick printed wiring board (PWB) with four layers. The top and bottom layers were not metalized. The two inner layers, comprising two-ounce copper, were used to provide traces for connectivity to the converter. The lack of metalization on the outer layers as well as the limited thermal connection ensured that heat transfer from the converter to the PWB was minimized. This provides a worst-case but consistent scenario for thermal derating purposes. All measurements requiring airflow were made in di/dt's vertical and horizontal wind tunnel facilities using Infrared (IR) thermography and thermocouples for thermometry. Ensuring components on the converter do not exceed their ratings is important to maintaining high reliability. If one anticipates operating the converter at or close to the maximum loads specified in the derating curves, it is prudent to check actual operating temperatures in the application. Thermographic imaging is preferable; if this capability is not available, then thermocouples may be used. di/dt recommends the use of AWG #40 gauge thermocouples to ensure measurement accuracy. Careful routing of the thermocouple leads will further minimize measurement error. Refer to Figure H for optimum measuring thermocouple location. Thermal Derating Load current vs. ambient temperature and airflow rates are given in Fig. x.1 for through-hole version. Ambient temperature was varied between 25C and 85C, with airflow rates from 30 to 500 LFM (0.15 to 2.5m/s), and vertical and horizontal converter mounting. For each set of conditions, the maximum load current was defined as the lowest of: (i) The output current at which any FET junction temperature did not exceed a maximum specified temperature (120C) as indicated by the thermographic image, or (ii) The nominal rating of the converter (4A on 12V, 5.3A on 8.0V, 8A on 6.0V, 10A on 5.0V, and 15A on 3.3 - 1.0V). During normal operation, derating curves with maximum FET temperature less than or equal to 120C should not be exceeded. Temperature on the PCB at the thermocouple location shown in Fig. H should not exceed 118C in order to operate inside the derating curves. SQ24 Family DS Ver 5 05-14-04 Fig. H: Location of the thermocouple for thermal testing. Efficiency Fig. x.5 shows the efficiency vs. load current plot for ambient temperature of 25C, airflow rate of 300 LFM (1.5m/s) with vertical mounting and input voltages of 18V, 24V and 36V. Also, a plot of efficiency vs. load current, as a function of ambient temperature with Vin = 24V, airflow rate of 200 LFM (1 m/s) with vertical mounting is shown in Fig. x.6. Power Dissipation Fig. x.7 shows the power dissipation vs. load current plot for Ta = 25C, airflow rate of 300 LFM (1.5m/s) with vertical mounting and input voltages of 18V, 24V and 36V. Also, a plot of power dissipation vs. load current, as a function of ambient temperature with Vin = 24V, airflow rate of 200 LFM (1 m/s) with vertical mounting is shown in Fig. x.8. Start-up Output voltage waveforms, during the turn-on transient using the ON/OFF pin for full rated load currents (resistive load) are shown without and with external load capacitance in Fig. x.9 and Fig. x.10, respectively. Ripple and Noise Fig. x.13 shows the output voltage ripple waveform, measured at full rated load current with a 10 F tantalum and 1 F ceramic capacitor across the output. Note that all output voltage waveforms are measured across a 1 F ceramic capacitor. The input reflected ripple current waveforms are obtained using the test setup shown in Fig x.14. The corresponding waveforms are shown in Fig. x.15 and Fig. x.16. USA Toll Free 866 WOW-didt Page 6 of 70 SQ24 Series Data Sheet Start-up Information (using negative ON/OFF) V IN Scenario #1: Initial Start-up From Bulk Supply ON/OFF function enabled, converter started via application of VIN. See Figure E. Time Comments t0 ON/OFF pin is ON; system front end power is toggled on, VIN to converter begins to rise. t1 VIN crosses Under-Voltage Lockout protection circuit threshold; converter enabled. t2 Converter begins to respond to turn-on command (converter turn-on delay). t3 Converter VOUT reaches 100% of nominal value. For this example, the total converter start-up time (t3- t1) is typically 4 ms. ON/OFF STATE OFF ON V OUT t1 t2 t0 t t3 Fig. E: Start-up scenario #1 Scenario #2: Initial Start-up Using ON/OFF Pin With VIN previously powered, converter started via ON/OFF pin. See Figure F. Time Comments t0 VINPUT at nominal value. t1 Arbitrary time when ON/OFF pin is enabled (converter enabled). t2 End of converter turn-on delay. t3 Converter VOUT reaches 100% of nominal value. For this example, the total converter start-up time (t3- t1) is typically 4 ms. VIN ON/OFF STATE OFF ON VOUT Scenario #3: Turn-off and Restart Using ON/OFF Pin With VIN previously powered, converter is disabled and then enabled via ON/OFF pin. See Figure G. Time Comments t0 VIN and VOUT are at nominal values; ON/OFF pin ON. t1 ON/OFF pin arbitrarily disabled; converter output falls to zero; turn-on inhibit delay period (100 ms typical) is initiated, and ON/OFF pin action is internally inhibited. t2 ON/OFF pin is externally re-enabled. If (t2- t1) 100 ms, external action of ON/OFF pin is locked out by start-up inhibit timer. If (t2- t1) > 100 ms, ON/OFF pin action is internally enabled. t3 Turn-on inhibit delay period ends. If ON/OFF pin is ON, converter begins turn-on; if off, converter awaits ON/OFF pin ON signal; see Figure F. t4 End of converter turn-on delay. t5 Converter VOUT reaches 100% of nominal value. For the condition, (t2- t1) 100 ms, the total converter start-up time (t5- t2) is typically 104 ms. For (t2- t1) > 100 ms, start-up will be typically 4 ms after release of ON/OFF pin. t0 t1 t2 t t3 Fig. F: Start-up scenario #2. V IN 100 ms ON/OFF STATE OFF ON V OUT t0 t1 t2 t3 t4 t5 t Fig. G: Start-up scenario #3. SQ24 Family DS Ver 5 05-14-04 USA Toll Free 866 WOW-didt Page 7 of 70 SQ24 Series Data Sheet Electrical Specifications: SQ24T/S04120 (12 Volts Out) Conditions: TA=25C, Airflow=300 LFM (1.5 m/s), Vin=24Vdc, Vout=12 Vdc unless otherwise specified. PARAMETER INPUT CHARACTERISTICS Maximum Input Current Input Stand-by Current Input No Load Current (0 load on the output) Input Reflected-Ripple Current Input Voltage Ripple Rejection NOTES MIN 4 Adc, 12 Vdc Out @ 18 Vdc In Vin = 24V, converter disabled Vin = 24V, converter enabled 25MHz bandwidth 120Hz TYP MAX UNITS 3.1 Adc mAdc mAdc mAPK-PK dB 12.000 12.120 Vdc 4 4 10 10 12.180 120 1000 4 5.5 10 1 mV mV Vdc mVPK-PK F Adc Adc A Arms 3 100 6 TBD OUTPUT CHARACTERISTICS Output Voltage Set Point (no load) Output Regulation Over Line Over Load Output Voltage Range Output Ripple and Noise - 25MHz bandwidth External Load Capacitance Output Current Range Current Limit Inception Peak Short-Circuit Current RMS Short-Circuit Current 11.880 2 Over line, load and temperature Full load + 10 F tantalum + 1 F ceramic Plus full load (resistive) 11.820 90 0 Non-latching Non-latching. Short=10m. Non-latching 5 7.5 Co = 1 F ceramic 1 F ceramic 150 200 20 mV mV s 87 87 % % DYNAMIC RESPONSE Load Change 25% of Iout Max, di/dt = 0.1 A/S di/dt = 5 A/S Setting Time to 1% EFFICIENCY 100% Load 50% Load Additional Notes: 2. -40C to 85C SQ24 Family DS Ver 5 05-14-04 USA Toll Free 866 WOW-didt Page 8 of 70 SQ24 Series Data Sheet 5 5 4 4 Load Current [Adc] Load Current [Adc] SQ24T/S04120 (12 Volts Out) 3 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 2 1 3 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 2 1 0 0 20 30 40 50 60 70 80 20 90 30 60 70 80 90 Fig. 12V.2: Available load current vs. ambient air temperature and airflow rates for SQ24T04120 converter with B height pins mounted horizontally with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. 5 5 4 4 Load Current [Adc] Load Current [Adc] Fig. 12V.1: Available load current vs. ambient air temperature and airflow rates for SQ24T04120 converter with B height pins mounted vertically with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. 3 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 1 50 Ambient Temperature [C] Ambient Temperature [C] 2 40 3 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 2 1 0 0 20 30 40 50 60 70 80 90 20 30 50 60 70 80 90 Ambient Temperature [C] Ambient Temperature [C] Fig. 12V.3: Available load current vs. ambient temperature and airflow rates for SQ24S04120 converter mounted vertically with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. SQ24 Family DS Ver 5 05-14-04 40 Fig. 12V.4: Available load current vs. ambient temperature and airflow rates for SQ24S04120 converter mounted horizontally with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. USA Toll Free 866 WOW-didt Page 9 of 70 SQ24 Series Data Sheet 0.95 0.95 0.90 0.90 0.85 0.85 Efficiency Efficiency SQ24T/S04120 (12 Volts Out) 0.80 0.75 0.80 0.75 36 V 24 V 18 V 0.70 70 C 55 C 40 C 0.70 0.65 0.65 0 1 2 3 4 5 0 1 Load Current [Adc] Fig. 12V.5: Efficiency vs. load current and input voltage for SQ24T/S04120 converter mounted vertically with air flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta = 25C. 3 4 5 Fig. 12V.6: Efficiency vs. load current and ambient temperature for SQ24T/S04120 converter mounted vertically with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of 200 LFM (1.0 m/s). 10.00 10.00 8.00 8.00 Power Dissipation [W] Power Dissipation [W] 2 Load Current [Adc] 6.00 4.00 36 V 24 V 18 V 2.00 6.00 4.00 70 C 55 C 40 C 2.00 0.00 0.00 0 1 2 3 4 5 0 2 3 4 5 Load Current [Adc] Load Current [Adc] Fig. 12V.7: Power dissipation vs. load current and input voltage for SQ24T/S04120 converter mounted vertically with air flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta = 25C. SQ24 Family DS Ver 5 05-14-04 1 Fig. 12V.8: Power dissipation vs. load current and ambient temperature for SQ24T/S04120 converter mounted vertically with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of 200 LFM (1.0 m/s). USA Toll Free 866 WOW-didt Page 10 of 70 SQ24 Series Data Sheet SQ24T/S04120 (12 Volts Out) Fig. 12V.9: Turn-on transient at full rated load current (resistive) with no output capacitor at Vin = 24V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage (5 V/div.). Time scale: 1 ms/div. Fig. 12V.10: Turn-on transient at full rated load current (resistive) plus 1,000F at Vin = 24V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage (5 V/div.). Time scale: 2 ms/div. Fig. 12V.11: Output voltage response to load current stepchange (1A - 2A - 1A) at Vin = 24V. Top trace: output voltage (200 mV/div.). Bottom trace: load current (1 A/div.). Current slew rate: 0.1 A/s. Co = 1 F ceramic. Time scale: 0.5 ms/div. Fig. 12V.12: Output voltage response to load current stepchange (1A - 2A - 1A) at Vin = 24V. Top trace: output voltage (200 mV/div.). Bottom trace: load current (1 A/div.). Current slew rate: 5 A/s. Co = 1 F ceramic. Time scale: 0.5 ms/div. SQ24 Family DS Ver 5 05-14-04 USA Toll Free 866 WOW-didt Page 11 of 70 SQ24 Series Data Sheet SQ24T/S04120 (12 Volts Out) iS 10 H source inductance Vsource iC 33 F ESR <1 electrolytic capacitor SemiQ Family TM DC/DC Converter 1 F ceramic Vout capacitor Fig. 12V.13: Output voltage ripple (50 mV/div.) at full rated load current into a resistive load with Co = 10 F tantalum + 1uF ceramic and Vin = 24V. Time scale: 1 s/div. Fig. 12V.14: Test Set-up for measuring input reflected ripple currents, ic and is. Fig. 12V.15: Input reflected ripple current, ic (100 mA/div.), measured at input terminals at full rated load current and Vin = 24V. Refer to Fig. 12V.14 for test setup. Time scale: 1 s/div. Fig. 12V.16: Input reflected ripple current, is (10 mA/div.), measured through 10H at the source at full rated load current and Vin = 24V. Refer to Fig. 12V.14 for test setup. Time scale: 1s/div. SQ24 Family DS Ver 5 05-14-04 USA Toll Free 866 WOW-didt Page 12 of 70 SQ24 Series Data Sheet SQ24T/S04120 (12 Volts Out) 15 Vout [Vdc] 10 5 0 0 1 2 3 4 5 6 Iout [Adc] Fig. 12V.17: Output voltage vs. load current showing current limit point and converter shutdown point. Input voltage has almost no effect on current limit characteristic. SQ24 Family DS Ver 5 05-14-04 Fig. 12V.18: Load current (top trace, 5 A/div., 20 ms/div.) into a 10 m short circuit during restart, at Vin = 24V. Bottom trace (5 A/div., 1 ms/div.) is an expansion of the on-time portion of the top trace. USA Toll Free 866 WOW-didt Page 13 of 70 SQ24 Series Data Sheet Electrical Specifications: SQ24T/S05080 (8.0 Volts Out) Conditions: TA=25C, Airflow=300 LFM (1.5 m/s), Vin=24 Vdc, Vout=8.0 Vdc unless otherwise specified. PARAMETER INPUT CHARACTERISTICS NOTES Maximum Input Current Input Stand-by Current Input No Load Current (0 load on the output) Input Reflected-Ripple Current Input Voltage Ripple Rejection MIN 5.3 Adc, 8.0 Vdc Out @ 18 Vdc In Vin = 24 V, converter disabled Vin = 24 V, converter enabled 25MHz bandwidth 120Hz TYP MAX UNITS 2.8 Adc mAdc mAdc mAPK-PK dB 8.000 8.080 Vdc 4 4 10 10 8.120 100 2200 5.3 6.75 12 1 mV mV Vdc mVPK-PK F Adc Adc A Arms 2.6 68 6 TBD OUTPUT CHARACTERISTICS Output Voltage Set Point (no load) Output Regulation Over Line Over Load Output Voltage Range Output Ripple and Noise - 25MHz bandwidth External Load Capacitance Output Current Range Current Limit Inception Peak Short-Circuit Current RMS Short-Circuit Current 7.920 2 Over line, load and temperature Full load + 10 F tantalum + 1 F ceramic Plus full load (resistive) 7.880 70 0 Non-latching Non-latching. Short=10m. Non-latching 6.25 10 Co = 1 F ceramic Co = 94 F tant. + 1 F ceramic 160 160 400 mV mV s 85.5 87 % % DYNAMIC RESPONSE Load Change 25% of Iout Max, di/dt = 0.1 A/S di/dt = 5 A/S Setting Time to 1% EFFICIENCY 100% Load 50% Load -40C to 85C 6 0.95 5 0.90 4 0.85 Efficiency Load Current [Adc] Additional Notes: 2. 3 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 2 1 0.80 0.75 36 V 24 V 18 V 0.70 0 0.65 20 30 40 50 60 70 80 90 0 Ambient Temperature [C] 2 3 4 5 6 Load Current [Adc] Fig. 8.0V.1: Available load current vs. ambient air temperature and airflow rates for SQ24T05080 converter with D height pins mounted vertically with Vin = 24 V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. SQ24 Family DS Ver 5 05-14-04 1 Fig. 8.0V.2: Efficiency vs. load current and input voltage for SQ24T/S05080 converter mounted vertically with air flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta = 25C. USA Toll Free 866 WOW-didt Page 14 of 70 SQ24 Series Data Sheet Electrical Specifications: SQ24T/S08060 (6.0 Volts Out) Conditions: TA=25C, Airflow=300 LFM (1.5 m/s), Vin=24Vdc, Vout=6.0 Vdc unless otherwise specified. PARAMETER INPUT CHARACTERISTICS Maximum Input Current Input Stand-by Current Input No Load Current (0 load on the output) Input Reflected-Ripple Current Input Voltage Ripple Rejection NOTES MIN 8 Adc, 6.0 Vdc Out @ 18 Vdc In Vin = 24V, converter disabled Vin = 24V, converter enabled 25MHz bandwidth 120Hz TYP MAX UNITS 3.1 Adc mAdc mAdc mAPK-PK dB 6.000 6.060 Vdc 2 2 5 5 6.090 60 10,000 8 11.5 25 2.5 mV mV Vdc mVPK-PK F Adc Adc A Arms 2.6 88 6 TBD OUTPUT CHARACTERISTICS Output Voltage Set Point (no load) Output Regulation Over Line Over Load Output Voltage Range Output Ripple and Noise - 25MHz bandwidth External Load Capacitance Output Current Range Current Limit Inception Peak Short-Circuit Current RMS Short-Circuit Current 5.940 2 Over line, load and temperature Full load + 10 F tantalum + 1 F ceramic Plus full load (resistive) 5.910 45 0 Non-latching Non-latching. Short=10m. Non-latching 10 15 Co = 1 F ceramic Co = 450 F tant. + 1 F ceramic 100 80 200 mV mV s 89 89 % % DYNAMIC RESPONSE Load Change 25% of Iout Max, di/dt = 0.1 A/S di/dt = 5 A/S Setting Time to 1% EFFICIENCY 100% Load 50% Load Additional Notes: 2. -40C to 85C SQ24 Family DS Ver 5 05-14-04 USA Toll Free 866 WOW-didt Page 15 of 70 SQ24 Series Data Sheet 10 10 8 8 Load Current [Adc] Load Current [Adc] SQ24T/S08060 (6.0 Volts Out) 6 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 4 2 6 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 4 2 0 0 20 30 40 50 60 70 80 90 20 30 Ambient Temperature [C] 10 8 8 Load Current [Adc] Load Current [Adc] 60 70 80 90 Fig. 6.0V.2: Available load current vs. ambient air temperature and airflow rates for SQ24T08060 converter with B height pins mounted horizontally with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. 10 6 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 2 50 Ambient Temperature [C] Fig. 6.0V.1: Available load current vs. ambient air temperature and airflow rates for SQ24T08060 converter with B height pins mounted vertically with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. 4 40 6 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 4 2 0 0 20 30 40 50 60 70 80 90 20 30 Ambient Temperature [C] 50 60 70 80 90 Ambient Temperature [C] Fig. 6.0V.3: Available load current vs. ambient temperature and airflow rates for SQ24S08060 converter mounted vertically with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. SQ24 Family DS Ver 5 05-14-04 40 Fig. 6.0V.4: Available load current vs. ambient temperature and airflow rates for SQ24S08060 converter mounted horizontally with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. USA Toll Free 866 WOW-didt Page 16 of 70 SQ24 Series Data Sheet 0.95 0.95 0.90 0.90 0.85 0.85 Efficiency Efficiency SQ24T/S08060 (6.0 Volts Out) 0.80 0.75 36 V 24 V 18 V 0.80 0.75 0.70 70 C 55 C 40 C 0.70 0.65 0 2 4 6 8 0.65 10 0 2 Load Current [Adc] 6 8 10 Load Current [Adc] Fig. 6.0V.5: Efficiency vs. load current and input voltage for SQ24T/S08060 converter mounted vertically with air flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta = 25C. Fig. 6.0V.6: Efficiency vs. load current and ambient temperature for SQ24T/S08060 converter mounted vertically with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of 200 LFM (1.0 m/s). 10.00 10.00 8.00 8.00 Power Dissipation [W] Power Dissipation [W] 4 6.00 4.00 72 V 48 V 36 V 2.00 6.00 4.00 70 C 55 C 40 C 2.00 0.00 0.00 0 2 4 6 8 10 0 Load Current [Adc] 4 6 8 10 Load Current [Adc] Fig. 6.0V.7: Power dissipation vs. load current and ambient temperature for SQ24T/S08060 converter mounted vertically with air flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta = 25C. SQ24 Family DS Ver 5 05-14-04 2 Fig. 6.0V.8: Power dissipation vs. load current and ambient temperature for SQ24T/S08060 converter mounted vertically with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of 200 LFM (1.0 m/s). USA Toll Free 866 WOW-didt Page 17 of 70 SQ24 Series Data Sheet SQ24T/S08060 (6.0 Volts Out) Fig. 6.0V.9: Turn-on transient at full rated load current (resistive) with no output capacitor at Vin = 24V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage (2 V/div.). Time scale: 1 ms/div. Fig. 6.0V.10: Turn-on transient at full rated load current (resistive) plus 10,000F at Vin = 24V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage (2 V/div.). Time scale: 2 ms/div. Fig. 6.0V.11: Output voltage response to load current stepchange (2A - 4A - 2A) at Vin = 24V. Top trace: output voltage (100mV/div.). Bottom trace: load current (2A/div.). Current slew rate: 0.1 A/s. Co = 1 F ceramic. Time scale: 0.2 ms/div. Fig. 6.0V.12: Output voltage response to load current stepchange (2A - 4A - 2A) at Vin = 24V. Top trace: output voltage (100mV/div.). Bottom trace: load current (2A/div.). Current slew rate: 5 A/s. Co = 450 F tantalum + 1 F ceramic. Time scale: 0.2 ms/div. SQ24 Family DS Ver 5 05-14-04 USA Toll Free 866 WOW-didt Page 18 of 70 SQ24 Series Data Sheet SQ24T/S08060 (6.0 Volts Out) iS 10 H source inductance Vsource iC 33 F ESR <1 electrolytic capacitor SemiQ Family TM DC/DC Converter 1 F ceramic Vout capacitor Fig. 6.0V.13: Output voltage ripple (50 mV/div.) at full rated load current into a resistive load with Co = 10 F tantalum + 1uF ceramic and Vin = 24V. Time scale: 1 s/div. Fig. 6.0V.14: Test Set-up for measuring input reflected ripple currents, ic and is. Fig. 6.0V.15: Input reflected ripple current, ic (100 mA/div.), measured at input terminals at full rated load current and Vin = 24V. Refer to Fig. 6.0V.14 for test setup. Time scale: 1 s/div. Fig. 6.0V.16: Input reflected ripple current, is (10 mA/div.), measured through 10 H at the source at full rated load current and Vin = 24V. Refer to Fig. 6.0V.14 for test setup. Time scale: 1s/div. SQ24 Family DS Ver 5 05-14-04 USA Toll Free 866 WOW-didt Page 19 of 70 SQ24 Series Data Sheet SQ24T/S08060 (6.0 Volts Out) 8 Vout [Vdc] 6 4 2 0 0 3 6 9 12 Iout [Adc] Fig. 6.0V.17: Output voltage vs. load current showing current limit point and converter shutdown point. Input voltage has almost no effect on current limit characteristic. SQ24 Family DS Ver 5 05-14-04 Fig. 6.0V.18: Load current (top trace, 20 A/div., 20 ms/div.) into a 10 m short circuit during restart, at Vin = 24V. Bottom trace (20 A/div., 2 ms/div.) is an expansion of the on-time portion of the top trace. USA Toll Free 866 WOW-didt Page 20 of 70 SQ24 Series Data Sheet Electrical Specifications: SQ24T/S10050 (5.0 Volts Out) Conditions: TA=25C, Airflow=300 LFM (1.5 m/s), Vin=24Vdc, Vout=5.0 Vdc unless otherwise specified. PARAMETER INPUT CHARACTERISTICS Maximum Input Current Input Stand-by Current Input No Load Current (0 load on the output) Input Reflected-Ripple Current Input Voltage Ripple Rejection NOTES MIN 10 Adc, 5.0 Vdc Out @ 18 Vdc In Vin = 24V, converter disabled Vin = 24V, converter enabled 25MHz bandwidth 120Hz TYP MAX UNITS 3.3 Adc mAdc mAdc mAPK-PK dB 5.000 5.050 Vdc 2 2 5 5 5.075 80 10,000 10 14 30 3 mV mV Vdc mVPK-PK F Adc Adc A Arms 3 93 6 TBD OUTPUT CHARACTERISTICS Output Voltage Set Point (no load) Output Regulation Over Line Over Load Output Voltage Range Output Ripple and Noise - 25MHz bandwidth External Load Capacitance Output Current Range Current Limit Inception Peak Short-Circuit Current RMS Short-Circuit Current 4.950 2 Over line, load and temperature Full load + 10 F tantalum + 1 F ceramic Plus full load (resistive) 4.925 45 0 Non-latching Non-latching. Short=10m. Non-latching 12.5 20 Co = 1 F ceramic Co = 450 F tant. + 1 F ceramic 140 90 200 mV mV s 86 87 % % DYNAMIC RESPONSE Load Change 25% of Iout Max, di/dt = 0.1 A/S di/dt = 5 A/S Setting Time to 1% EFFICIENCY 100% Load 50% Load Additional Notes: 2. -40C to 85C SQ24 Family DS Ver 5 05-14-04 USA Toll Free 866 WOW-didt Page 21 of 70 SQ24 Series Data Sheet 12 12 10 10 Load Current [Adc] Load Current [Adc] SQ24T/S10050 (5.0 Volts Out) 8 6 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 4 2 8 6 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 4 2 0 0 20 30 40 50 60 70 80 90 20 30 Ambient Temperature [C] 12 10 10 Load Current [Adc] Load Current [Adc] 60 70 80 90 Fig. 5.0V.2: Available load current vs. ambient air temperature and airflow rates for SQ24T10050 converter with B height pins mounted horizontally with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. 12 8 6 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 2 50 Ambient Temperature [C] Fig. 5.0V.1: Available load current vs. ambient air temperature and airflow rates for SQ24T10050 converter with B height pins mounted vertically with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. 4 40 8 6 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 4 2 0 0 20 30 40 50 60 70 80 90 20 30 50 60 70 80 90 Ambient Temperature [C] Ambient Temperature [C] Fig. 5.0V.3: Available load current vs. ambient temperature and airflow rates for SQ24S10050 converter mounted vertically with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. SQ24 Family DS Ver 5 05-14-04 40 Fig. 5.0V.4: Available load current vs. ambient temperature and airflow rates for SQ24S10050 converter mounted horizontally with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. USA Toll Free 866 WOW-didt Page 22 of 70 SQ24 Series Data Sheet 0.95 0.95 0.90 0.90 0.85 0.85 Efficiency Efficiency SQ24T/S10050 (5.0 Volts Out) 0.80 0.75 0.80 0.75 36 V 24 V 18 V 0.70 70 C 55 C 40 C 0.70 0.65 0.65 0 2 4 6 8 10 12 0 2 4 Load Current [Adc] Fig. 5.0V.5: Efficiency vs. load current and input voltage for SQ24T/S10050 converter mounted vertically with air flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta = 25C. 8 10 12 Fig. 5.0V.6: Efficiency vs. load current and ambient temperature for SQ24T/S10050 converter mounted vertically with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of 200 LFM (1.0 m/s). 10.00 10.00 8.00 8.00 Power Dissipation [W] Power Dissipation [W] 6 Load Current [Adc] 6.00 4.00 36 V 24 V 18 V 2.00 6.00 4.00 70 C 55 C 40 C 2.00 0.00 0.00 0 2 4 6 8 10 12 0 4 6 8 10 12 Load Current [Adc] Load Current [Adc] Fig. 5.0V.7: Power dissipation vs. load current and input voltage for SQ24T/S10050 converter mounted vertically with air flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta = 25C. SQ24 Family DS Ver 5 05-14-04 2 Fig. 5.0V.8: Power dissipation vs. load current and ambient temperature for SQ24T/S10050 converter mounted vertically with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of 200 LFM (1.0 m/s). USA Toll Free 866 WOW-didt Page 23 of 70 SQ24 Series Data Sheet SQ24T/S10050 (5.0 Volts Out) Fig. 5.0V.9: Turn-on transient at full rated load current (resistive) with no output capacitor at Vin = 24V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage (2 V/div.). Time scale: 2 ms/div. Fig. 5.0V.10: Turn-on transient at full rated load current (resistive) plus 10,000 F at Vin = 24V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage (2 V/div.). Time scale: 2 ms/div. Fig. 5.0V.11: Output voltage response to load current stepchange (2.5A - 5A - 2.5A) at Vin = 24V. Top trace: output voltage (100 mV/div.). Bottom trace: load current (2 A/div.). Current slew rate: 0.1 A/s. Co = 1 F ceramic. Time scale: 0.2 ms/div. Fig. 5.0V.12: Output voltage response to load current stepchange (2.5A - 5A - 2.5A) at Vin = 24V. Top trace: output voltage (100 mV/div.). Bottom trace: load current (2 A/div.). Current slew rate: 5 A/s. Co = 450 F tantalum + 1 F ceramic. Time scale: 0.2 ms/div. SQ24 Family DS Ver 5 05-14-04 USA Toll Free 866 WOW-didt Page 24 of 70 SQ24 Series Data Sheet SQ24T/S10050 (5.0 Volts Out) iS 10 H source inductance Vsource iC 33 F ESR <1 electrolytic capacitor SemiQ Family TM DC/DC Converter 1 F ceramic Vout capacitor Fig. 5.0V.13: Output voltage ripple (20 mV/div.) at full rated load current into a resistive load with Co = 10 F tantalum + 1uF ceramic and Vin = 24V. Time scale: 1 s/div. Fig. 5.0V.14: Test Set-up for measuring input reflected ripple currents, ic and is. Fig. 5.0V.15: Input reflected ripple current, ic (100 mA/div.), measured at input terminals at full rated load current and Vin = 24V. Refer to Fig. 5.0V.14 for test setup. Time scale: 1 s/div. Fig. 5.0V.16: Input reflected ripple current, is (10 mA/div.), measured through 10 H at the source at full rated load current and Vin = 24V. Refer to Fig. 5.0V.14 for test setup. Time scale: 1s/div. SQ24 Family DS Ver 5 05-14-04 USA Toll Free 866 WOW-didt Page 25 of 70 SQ24 Series Data Sheet SQ24T/S10050 (5.0 Volts Out) 6.0 5.0 Vout [Vdc] 4.0 3.0 2.0 1.0 0 0 5 10 15 Iout [Adc] Fig. 5.0V.17: Output voltage vs. load current showing current limit point and converter shutdown point. Input voltage has almost no effect on current limit characteristic. SQ24 Family DS Ver 5 05-14-04 Fig. 5.0V.18: Load current (top trace, 10 A/div., 20 ms/div.) into a 10 m short circuit during restart, at Vin = 24V. Bottom trace (10 A/div., 1 ms/div.) is an expansion of the on-time portion of the top trace. USA Toll Free 866 WOW-didt Page 26 of 70 SQ24 Series Data Sheet Electrical Specifications: SQ24T/S15033 (3.3 Volts Out) Conditions: TA=25C, Airflow=300 LFM (1.5 m/s), Vin=24Vdc, Vout=3.3 Vdc unless otherwise specified. PARAMETER INPUT CHARACTERISTICS Maximum Input Current Input Stand-by Current Input No Load Current (0 load on the output) Input Reflected-Ripple Current Input Voltage Ripple Rejection NOTES MIN 15 Adc, 3.3 Vdc Out @ 18 Vdc In Vin = 24V, converter disabled Vin = 24V, converter enabled 25MHz bandwidth 120Hz TYP MAX UNITS 3.2 Adc mAdc mAdc mAPK-PK dB 3.300 3.333 Vdc 2 2 5 5 3.350 50 15,000 15 20 40 5.3 mV mV Vdc mVPK-PK F Adc Adc A Arms 3 100 6 TBD OUTPUT CHARACTERISTICS Output Voltage Set Point (no load) Output Regulation Over Line Over Load Output Voltage Range Output Ripple and Noise - 25MHz bandwidth External Load Capacitance Output Current Range Current Limit Inception Peak Short-Circuit Current RMS Short-Circuit Current 3.267 2 Over line, load and temperature Full load + 10 F tantalum + 1 F ceramic Plus full load (resistive) 3.250 30 0 Non-latching Non-latching. Short=10m. Non-latching 18 30 Co = 1 F ceramic Co = 450 F tant. + 1 F ceramic 100 100 100 mV mV s 88 88 % % DYNAMIC RESPONSE Load Change 25% of Iout Max, di/dt = 0.1 A/S di/dt = 5 A/S Setting Time to 1% EFFICIENCY 100% Load 50% Load Additional Notes: 2. -40C to 85C SQ24 Family DS Ver 5 05-14-04 USA Toll Free 866 WOW-didt Page 27 of 70 SQ24 Series Data Sheet 20 20 15 15 Load Current [Adc] Load Current [Adc] SQ24T/S15033 (3.3 Volts Out) 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 5 0 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 5 0 20 30 40 50 60 70 80 90 20 30 Ambient Temperature [C] 60 70 80 90 Fig. 3.3V.2: Available load current vs. ambient air temperature and airflow rates for SQ24T15033 converter with B height pins mounted horizontally with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. 20 20 15 15 Load Current [Adc] Load Current [Adc] 50 Ambient Temperature [C] Fig. 3.3V.1: Available load current vs. ambient air temperature and airflow rates for SQ24T15033 converter with B height pins mounted vertically with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 5 40 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 5 0 0 20 30 40 50 60 70 80 90 20 30 50 60 70 80 90 Ambient Temperature [C] Ambient Temperature [C] Fig. 3.3V.3: Available load current vs. ambient temperature and airflow rates for SQ24S15033 converter mounted vertically with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. SQ24 Family DS Ver 5 05-14-04 40 Fig. 3.3V.4: Available load current vs. ambient temperature and airflow rates for SQ24S15033 converter mounted horizontally with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. USA Toll Free 866 WOW-didt Page 28 of 70 SQ24 Series Data Sheet 0.95 0.95 0.90 0.90 0.85 0.85 Efficiency Efficiency SQ24T/S15033 (3.3 Volts Out) 0.80 0.75 0.80 0.75 36 V 24 V 18 V 0.70 70 C 55 C 40 C 0.70 0.65 0.65 0 2 4 6 8 10 12 14 16 0 2 4 Load Current [Adc] Fig. 3.3V.5: Efficiency vs. load current and input voltage for SQ24T/S15033 converter mounted vertically with air flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta = 25C. 8 10 12 14 16 Fig. 3.3V.6: Efficiency vs. load current and ambient temperature for SQ24T/S15033 converter mounted vertically with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of 200 LFM (1.0 m/s). 8.00 8.00 6.00 6.00 Power Dissipation [W] Power Dissipation [W] 6 Load Current [Adc] 4.00 36 V 24 V 18 V 2.00 4.00 70 C 55 C 40 C 2.00 0.00 0.00 0 2 4 6 8 10 12 14 16 0 2 6 8 10 12 14 16 Load Current [Adc] Load Current [Adc] Fig. 3.3V.7: Power dissipation vs. load current and input voltage for SQ24T/S15033 converter mounted vertically with air flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta = 25C. SQ24 Family DS Ver 5 05-14-04 4 Fig. 3.3V.8: Power dissipation vs. load current and ambient temperature for SQ24T/S15033 converter mounted vertically with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of 200 LFM (1.0 m/s). USA Toll Free 866 WOW-didt Page 29 of 70 SQ24 Series Data Sheet SQ24T/S15033 (3.3 Volts Out) Fig. 3.3V.9: Turn-on transient at full rated load current (resistive) with no output capacitor at Vin = 24V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage (1 V/div.). Time scale: 2 ms/div. Fig. 3.3V.10: Turn-on transient at full rated load current (resistive) plus 10,000 F at Vin = 24V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage (1 V/div.). Time scale: 2 ms/div. Fig. 3.3V.11: Output voltage response to load current stepchange (3.75A - 7.5A - 3.75A) at Vin = 24V. Top trace: output voltage (100 mV/div.). Bottom trace: load current (5 A/div.). Current slew rate: 0.1 A/s. Co = 1 F ceramic. Time scale: 0.2 ms/div. Fig. 3.3V.12: Output voltage response to load current stepchange (3.75A - 7.5A - 3.75A) at Vin = 24V. Top trace: output voltage (100 mV/div.). Bottom trace: load current (5 A/div.). Current slew rate: 5 A/s. Co = 450 F tantalum + 1 F ceramic. Time scale: 0.2 ms/div. SQ24 Family DS Ver 5 05-14-04 USA Toll Free 866 WOW-didt Page 30 of 70 SQ24 Series Data Sheet SQ24T/S15033 (3.3 Volts Out) iS 10 H source inductance Vsource iC 33 F ESR <1 electrolytic capacitor SemiQ Family TM DC/DC Converter 1 F ceramic Vout capacitor Fig. 3.3V.13: Output voltage ripple (20 mV/div.) at full rated load current into a resistive load with Co = 10 F tantalum + 1uF ceramic and Vin = 24V. Time scale: 1 s/div. Fig. 3.3V.14: Test Set-up for measuring input reflected ripple currents, ic and is. Fig. 3.3V.15: Input reflected ripple current, ic (100 mA/div.), measured at input terminals at full rated load current and Vin = 24V. Refer to Fig. 3.3V.14 for test setup. Time scale: 1 s/div. Fig. 3.3V.16: Input reflected ripple current, is (10 mA/div.), measured through 10 H at the source at full rated load current and Vin = 24V. Refer to Fig. 3.3V.14 for test setup. Time scale: 1s/div. SQ24 Family DS Ver 5 05-14-04 USA Toll Free 866 WOW-didt Page 31 of 70 SQ24 Series Data Sheet SQ24T/S15033 (3.3 Volts Out) 4 Vout [Vdc] 3 2 1 0 0 5 10 15 20 Iout [Adc] Fig. 3.3V.17: Output voltage vs. load current showing current limit point and converter shutdown point. Input voltage has almost no effect on current limit characteristic. SQ24 Family DS Ver 5 05-14-04 Fig. 3.3V.18: Load current (top trace, 20 A/div., 20 ms/div.) into a 10 m short circuit during restart, at Vin = 24V. Bottom trace (20 A/div., 1 ms/div.) is an expansion of the on-time portion of the top trace. USA Toll Free 866 WOW-didt Page 32 of 70 SQ24 Series Data Sheet Electrical Specifications: SQ24T/S15025 (2.5 Volts Out) Conditions: TA=25C, Airflow=300 LFM (1.5 m/s), Vin=24Vdc, Vout=2.5 Vdc unless otherwise specified. PARAMETER INPUT CHARACTERISTICS Maximum Input Current Input Stand-by Current Input No Load Current (0 load on the output) Input Reflected-Ripple Current Input Voltage Ripple Rejection NOTES MIN 15 Adc, 2.5 Vdc Out @ 18 Vdc In Vin = 24V, converter disabled Vin = 24V, converter enabled 25MHz bandwidth 120Hz TYP MAX UNITS 2.5 Adc mAdc mAdc mAPK-PK dB 2.500 2.525 Vdc 2 2 5 5 2.538 50 15,000 15 20 40 5.3 mV mV Vdc mVPK-PK F Adc Adc A Arms 3 67 6 TBD OUTPUT CHARACTERISTICS Output Voltage Set Point (no load) Output Regulation Over Line Over Load Output Voltage Range Output Ripple and Noise - 25MHz bandwidth External Load Capacitance Output Current Range Current Limit Inception Peak Short-Circuit Current RMS Short-Circuit Current 2.475 2 Over line, load and temperature Full load + 10 F tantalum + 1 F ceramic Plus full load (resistive) 2.462 30 0 Non-latching Non-latching. Short=10m. Non-latching 18 30 Co = 1 F ceramic) Co = 450 F tant. + 1 F ceramic 110 120 150 mV mV s 86.5 87 % % DYNAMIC RESPONSE Load Change 25% of Iout Max, di/dt = 0.1 A/S di/dt = 5 A/S Setting Time to 1% EFFICIENCY 100% Load 50% Load Additional Notes: 2. -40C to 85C SQ24 Family DS Ver 5 05-14-04 USA Toll Free 866 WOW-didt Page 33 of 70 SQ24 Series Data Sheet 20 20 15 15 Load Current [Adc] Load Current [Adc] SQ24T/S15025 (2.5 Volts Out) 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 5 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 5 0 0 20 30 40 50 60 70 80 20 90 30 Fig. 2.5V.1: Available load current vs. ambient air temperature and airflow rates for SQ24T15025 converter with B height pins mounted vertically with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. 60 70 80 90 Fig. 2.5V.2: Available load current vs. ambient air temperature and airflow rates for SQ24T15025 converter with B height pins mounted horizontally with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. 20 20 15 15 Load Current [Adc] Load Current [Adc] 50 Ambient Temperature [C] Ambient Temperature [C] 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 5 40 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 5 0 0 20 30 40 50 60 70 80 90 20 30 50 60 70 80 90 Ambient Temperature [C] Ambient Temperature [C] Fig. 2.5V.3: Available load current vs. ambient temperature and airflow rates for SQ24S15025 converter mounted vertically with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. SQ24 Family DS Ver 5 05-14-04 40 Fig. 2.5V.4: Available load current vs. ambient temperature and airflow rates for SQ24S15025 converter mounted horizontally with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. USA Toll Free 866 WOW-didt Page 34 of 70 SQ24 Series Data Sheet 0.95 0.95 0.90 0.90 0.85 0.85 Efficiency Efficiency SQ24T/S15025 (2.5 Volts Out) 0.80 0.75 0.80 0.75 36 V 24 V 18 V 0.70 70 C 55 C 40 C 0.70 0.65 0.65 0 2 4 6 8 10 12 14 16 0 2 4 Load Current [Adc] Fig. 2.5V.5: Efficiency vs. load current and input voltage for SQ24T/S15025 converter mounted vertically with air flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta = 25C. 8 10 12 14 16 Fig. 2.5V.6: Efficiency vs. load current and ambient temperature for SQ24T/S15025 converter mounted vertically with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of 200 LFM (1.0 m/s). 8.00 8.00 6.00 6.00 Power Dissipation [W] Power Dissipation [W] 6 Load Current [Adc] 4.00 36 V 24 V 18 V 2.00 4.00 70 C 55 C 40 C 2.00 0.00 0.00 0 2 4 6 8 10 12 14 16 0 2 6 8 10 12 14 16 Load Current [Adc] Load Current [Adc] Fig. 2.5V.7: Power dissipation vs. load current and input voltage for SQ24T/S15025 converter mounted vertically with air flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta = 25C. SQ24 Family DS Ver 5 05-14-04 4 Fig. 2.5V.8: Power dissipation vs. load current and ambient temperature for SQ24T/S15025 converter mounted vertically with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of 200 LFM (1.0 m/s). USA Toll Free 866 WOW-didt Page 35 of 70 SQ24 Series Data Sheet SQ24T/S15025 (2.5 Volts Out) Fig. 2.5V.9: Turn-on transient at full rated load current (resistive) with no output capacitor at Vin = 24V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage (1 V/div.). Time scale: 1 ms/div. Fig. 2.5V.10: Turn-on transient at full rated load current (resistive) plus 10,000 F at Vin = 24V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage (1 V/div.). Time scale: 1 ms/div. Fig. 2.5V.11: Output voltage response to load current stepchange (3.75 A - 7.5 A - 3.75 A) at Vin = 24V. Top trace: output voltage (100 mV/div.). Bottom trace: load current (5 A/div.). Current slew rate: 0.1 A/s. Co = 1 F ceramic. Time scale: 0.2 ms/div. Fig. 2.5V.12: Output voltage response to load current stepchange (3.75 A - 7.5 A - 3.75 A) at Vin = 24V. Top trace: output voltage (100 mV/div.). Bottom trace: load current (5 A/div.). Current slew rate: 5 A/s. Co = 450 F tantalum + 1 F ceramic. Time scale: 0.2 ms/div. SQ24 Family DS Ver 5 05-14-04 USA Toll Free 866 WOW-didt Page 36 of 70 SQ24 Series Data Sheet SQ24T/S15025 (2.5 Volts Out) iS 10 H source inductance Vsource iC 33 F ESR <1 electrolytic capacitor SemiQ Family TM DC/DC Converter 1 F ceramic Vout capacitor Fig. 2.5V.13: Output voltage ripple (20 mV/div.) at full rated load current into a resistive load with Co = 10 F tantalum + 1uF ceramic and Vin = 24V. Time scale: 1 s/div. Fig. 2.5V.14: Test Set-up for measuring input reflected ripple currents, ic and is. Fig. 2.5V.15: Input reflected ripple current, ic (100 mA/div.), measured at input terminals at full rated load current and Vin = 24V. Refer to Fig. 2.5V.14 for test setup. Time scale: 1 s/div. Fig. 2.5V.16: Input reflected ripple current, is (10 mA/div.), measured through 10 H at the source at full rated load current and Vin = 24V. Refer to Fig. 2.5V.14 for test setup. Time scale: 1s/div. SQ24 Family DS Ver 5 05-14-04 USA Toll Free 866 WOW-didt Page 37 of 70 SQ24 Series Data Sheet SQ24T/S15025 (2.5 Volts Out) 3 Vout [Vdc] 2 1 0 0 5 10 15 20 Iout [Adc] Fig. 2.5V.17: Output voltage vs. load current showing current limit point and converter shutdown point. Input voltage has almost no effect on current limit characteristic. SQ24 Family DS Ver 5 05-14-04 Fig. 2.5V.18: Load current (top trace, 20 A/div., 20 ms/div.) into a 10 m short circuit during restart, at Vin = 24V. Bottom trace (20 A/div., 1 ms/div.) is an expansion of the on-time portion of the top trace. USA Toll Free 866 WOW-didt Page 38 of 70 SQ24 Series Data Sheet Electrical Specifications: SQ24T/S15020 (2.0 Volts Out) Conditions: TA=25C, Airflow=300 LFM (1.5 m/s), Vin=24Vdc, Vout=2.0 Vdc unless otherwise specified. PARAMETER INPUT CHARACTERISTICS Maximum Input Current Input Stand-by Current Input No Load Current (0 load on the output) Input Reflected-Ripple Current Input Voltage Ripple Rejection NOTES MIN 15 Adc, 2.0 Vdc Out @ 18 Vdc In Vin = 24V, converter disabled Vin = 24V, converter enabled 25MHz bandwidth 120Hz TYP MAX UNITS 2 Adc mAdc mAdc mAPK-PK dB 2.000 2.02 Vdc 2 2 5 5 2.030 50 15,000 15 20 40 5.3 mV mV Vdc mVPK-PK F Adc Adc A Arms 3 57 6 TBD OUTPUT CHARACTERISTICS Output Voltage Set Point (no load) Output Regulation Over Line Over Load Output Voltage Range Output Ripple and Noise - 25MHz bandwidth External Load Capacitance Output Current Range Current Limit Inception Peak Short-Circuit Current RMS Short-Circuit Current 1.98 2 Over line, load and temperature Full load + 10 F tantalum + 1 F ceramic Plus full load (resistive) 1.970 30 0 Non-latching Non-latching. Short=10m. Non-latching 18 30 Co = 1 F ceramic Co = 450 F tant. + 1 F ceramic 100 120 150 mV mV s 85 85 % % DYNAMIC RESPONSE Load Change 25% of Iout Max, di/dt = 0.1 A/S di/dt = 5 A/S Setting Time to 1% EFFICIENCY 100% Load 50% Load Additional Notes: 2. -40C to 85C SQ24 Family DS Ver 5 05-14-04 USA Toll Free 866 WOW-didt Page 39 of 70 SQ24 Series Data Sheet 20 20 15 15 Load Current [Adc] Load Current [Adc] SQ24T/S15020 (2.0 Volts Out) 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 5 0 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 5 0 20 30 40 50 60 70 80 90 20 30 Ambient Temperature [C] 60 70 80 90 Fig. 2.0V.2: Available load current vs. ambient air temperature and airflow rates for SQ24T15020 converter with B height pins mounted horizontally with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. 20 20 15 15 Load Current [Adc] Load Current [Adc] 50 Ambient Temperature [C] Fig. 2.0V.1: Available load current vs. ambient air temperature and airflow rates for SQ24T15020 converter with B height pins mounted vertically with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 5 40 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 5 0 0 20 30 40 50 60 70 80 90 20 30 50 60 70 80 90 Ambient Temperature [C] Ambient Temperature [C] Fig. 2.0V.3: Available load current vs. ambient temperature and airflow rates for SQ24S15020 converter mounted vertically with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. SQ24 Family DS Ver 5 05-14-04 40 Fig. 2.0V.4: Available load current vs. ambient temperature and airflow rates for SQ24S15020 converter mounted horizontally with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. USA Toll Free 866 WOW-didt Page 40 of 70 SQ24 Series Data Sheet 0.95 0.95 0.90 0.90 0.85 0.85 Efficiency Efficiency SQ24T/S15020 (2.0 Volts Out) 0.80 0.75 0.80 0.75 36 V 24 V 18 V 0.70 70 C 55 C 40 C 0.70 0.65 0.65 0 2 4 6 8 10 12 14 16 0 2 4 Load Current [Adc] Fig. 2.0V.5: Efficiency vs. load current and input voltage for SQ24T/S15020 converter mounted vertically with air flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta = 25C. 8 10 12 14 16 Fig. 2.0V.6: Efficiency vs. load current and ambient temperature for SQ24T/S15020 converter mounted vertically with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of 200 LFM (1.0 m/s). 6.00 6.00 5.00 5.00 Power Dissipation [W] Power Dissipation [W] 6 Load Current [Adc] 4.00 3.00 2.00 36 V 24 V 18 V 4.00 3.00 2.00 70 C 55 C 40 C 1.00 1.00 0.00 0.00 0 2 4 6 8 10 12 14 16 0 2 6 8 10 12 14 16 Load Current [Adc] Load Current [Adc] Fig. 2.0V.7: Power dissipation vs. load current and input voltage for SQ24T/S15020 converter mounted vertically with air flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta = 25C. SQ24 Family DS Ver 5 05-14-04 4 Fig. 2.0V.8: Power dissipation vs. load current and ambient temperature for SQ24T/S15020 converter mounted vertically with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of 200 LFM (1.0 m/s). USA Toll Free 866 WOW-didt Page 41 of 70 SQ24 Series Data Sheet SQ24T/S15020 (2.0 Volts Out) Fig. 2.0V.9: Turn-on transient at full rated load current (resistive) with no output capacitor at Vin = 24V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage (1 V/div.). Time scale: 1 ms/div. Fig. 2.0V.10: Turn-on transient at full rated load current (resistive) plus 10,000F at Vin = 24V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage (1 V/div.). Time scale: 1 ms/div. Fig. 2.0V.11: Output voltage response to load current stepchange (3.75A - 7.5A - 3.75A) at Vin = 24V. Top trace: output voltage (100 mV/div.). Bottom trace: load current (5 A/div.). Current slew rate: 0.1 A/s. Co = 1 F ceramic. Time scale: 0.2 ms/div. Fig. 2.0V.12: Output voltage response to load current stepchange (3.75A - 7.5A - 3.75A) at Vin = 24V. Top trace: output voltage (100 mV/div.). Bottom trace: load current (5 A/div.). Current slew rate: 5 A/s. Co = 450 F tantalum + 1 F ceramic. Time scale: 0.2 ms/div. SQ24 Family DS Ver 5 05-14-04 USA Toll Free 866 WOW-didt Page 42 of 70 SQ24 Series Data Sheet SQ24T/S15020 (2.0 Volts Out) iS 10 H source inductance Vsource iC 33 F ESR <1 electrolytic capacitor SemiQ Family TM DC/DC Converter 1 F ceramic Vout capacitor Fig. 2.0V.13: Output voltage ripple (20 mV/div.) at full rated load current into a resistive load with Co = 10 F tantalum + 1uF ceramic and Vin = 24V. Time scale: 1 s/div. Fig. 2.0V.14: Test Set-up for measuring input reflected ripple currents, ic and is. Fig. 2.0V.15: Input reflected ripple current, ic (100 mA/div.), measured at input terminals at full rated load current and Vin = 24V. Refer to Fig. 2.0V.14 for test setup. Time scale: 1 s/div. Fig. 2.0V.16: Input reflected ripple current, is (10 mA/div.), measured through 10 H at the source at full rated load current and Vin = 24V. Refer to Fig. 2.0V.14 for test setup. Time scale: 1s/div. SQ24 Family DS Ver 5 05-14-04 USA Toll Free 866 WOW-didt Page 43 of 70 SQ24 Series Data Sheet SQ24T/S15020 (2.0 Volts Out) 3 Vout [Vdc] 2 1 0 0 10 5 15 20 Iout [Adc] Fig. 2.0V.17: Output voltage vs. load current showing current limit point and converter shutdown point. Input voltage has almost no effect on current limit characteristic. SQ24 Family DS Ver 5 05-14-04 Fig. 2.0V.18: Load current (top trace, 20 A/div., 20 ms/div.) into a 10 m short circuit during restart, at Vin = 24V. Bottom trace (20 A/div., 2 ms/div.) is an expansion of the on-time portion of the top trace. USA Toll Free 866 WOW-didt Page 44 of 70 SQ24 Series Data Sheet Electrical Specifications: SQ24T/S15018 (1.8 Volts Out) Conditions: TA=25C, Airflow=300 LFM (1.5 m/s), Vin=24Vdc, Vout=1.8 Vdc unless otherwise specified. PARAMETER INPUT CHARACTERISTICS Maximum Input Current Input Stand-by Current Input No Load Current (0 load on the output) Input Reflected-Ripple Current Input Voltage Ripple Rejection NOTES MIN 15 Adc, 1.8 Vdc Out @ 18 Vdc In Vin = 24V, converter disabled Vin = 24V, converter enabled 25MHz bandwidth 120Hz TYP MAX UNITS 1.8 Adc mAdc mAdc mAPK-PK dB 1.800 1.818 Vdc 2 2 4 5 1.827 50 15,000 15 20 40 5.3 mV mV Vdc mVPK-PK F Adc Adc A Arms 3 53 6 TBD OUTPUT CHARACTERISTICS Output Voltage Set Point (no load) Output Regulation Over Line Over Load Output Voltage Range Output Ripple and Noise - 25MHz bandwidth External Load Capacitance Output Current Range Current Limit Inception Peak Short-Circuit Current RMS Short-Circuit Current 1.782 2 Over line, load and temperature Full load + 10 F tantalum + 1 F ceramic Plus full load (resistive) 1.773 30 0 Non-latching Non-latching. Short=10m. Non-latching 18 30 Co = 1 F ceramic Co = 450 F tant. + 1 F ceramic 100 120 150 mV mV s 84.5 84 % % DYNAMIC RESPONSE Load Change 25% of Iout Max, di/dt = 0.1 A/S di/dt = 5 A/S Setting Time to 1% EFFICIENCY 100% Load 50% Load Additional Notes: 2. -40C to 85C SQ24 Family DS Ver 5 05-14-04 USA Toll Free 866 WOW-didt Page 45 of 70 SQ24 Series Data Sheet 20 20 15 15 Load Current [Adc] Load Current [Adc] SQ24T/S15018 (1.8 Volts Out) 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 5 0 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 5 0 20 30 40 50 60 70 80 90 20 30 Ambient Temperature [C] 60 70 80 90 Fig. 1.8V.2: Available load current vs. ambient air temperature and airflow rates for SQ24T15018 converter with B height pins mounted horizontally with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. 20 20 15 15 Load Current [Adc] Load Current [Adc] 50 Ambient Temperature [C] Fig. 1.8V.1: Available load current vs. ambient air temperature and airflow rates for SQ24T15018 converter with B height pins mounted vertically with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 5 40 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 5 0 0 20 30 40 50 60 70 80 90 20 30 50 60 70 80 90 Ambient Temperature [C] Ambient Temperature [C] Fig. 1.8V.3: Available load current vs. ambient temperature and airflow rates for SQ24S15018 converter mounted vertically with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. SQ24 Family DS Ver 5 05-14-04 40 Fig. 1.8V.4: Available load current vs. ambient temperature and airflow rates for SQ24S15018 converter mounted horizontally with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. USA Toll Free 866 WOW-didt Page 46 of 70 SQ24 Series Data Sheet 0.95 0.95 0.90 0.90 0.85 0.85 Efficiency Efficiency SQ24T/S15018 (1.8 Volts Out) 0.80 0.75 0.80 0.75 36 V 24 V 18 V 0.70 70 C 55 C 40 C 0.70 0.65 0.65 0 2 4 6 8 10 12 14 16 0 2 4 Load Current [Adc] Fig. 1.8V.5: Efficiency vs. load current and input voltage for SQ24T/S15018 converter mounted vertically with air flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta = 25C. 8 10 12 14 16 Fig. 1.8V.6: Efficiency vs. load current and ambient temperature for SQ24T/S15018 converter mounted vertically with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of 200 LFM (1.0 m/s). 6.00 6.00 5.00 5.00 Power Dissipation [W] Power Dissipation [W] 6 Load Current [Adc] 4.00 3.00 2.00 36 V 24 V 18 V 4.00 3.00 2.00 70 C 55 C 40 C 1.00 1.00 0.00 0.00 0 2 4 6 8 10 12 14 16 0 2 Fig. 1.8V.7: Power dissipation vs. load current and input voltage for SQ24T/S15018 converter mounted vertically with air flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta = 25C. SQ24 Family DS Ver 5 05-14-04 4 6 8 10 12 14 16 Load Current [Adc] Load Current [Adc] Fig. 1.8V.8: Power dissipation vs. load current and ambient temperature for SQ24T/S15018 converter mounted vertically with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of 200 LFM (1.0 m/s). USA Toll Free 866 WOW-didt Page 47 of 70 SQ24 Series Data Sheet SQ24T/S15018 (1.8 Volts Out) Fig. 1.8V.9: Turn-on transient at full rated load current (resistive) with no output capacitor at Vin = 24V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage (1 V/div.). Time scale: 1 ms/div. Fig. 1.8V.10: Turn-on transient at full rated load current (resistive) plus 10,000F at Vin = 24V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage (1 V/div.). Time scale: 1 ms/div. Fig. 1.8V.11: Output voltage response to load current stepchange (3.75A - 7.5A - 3.75A) at Vin = 24V. Top trace: output voltage (100 mV/div.). Bottom trace: load current (5 A/div.). Current slew rate: 0.1 A/s. Co = 1 F ceramic. Time scale: 0.2 ms/div. Fig. 1.8V.12: Output voltage response to load current stepchange (3.75A - 7.5A - 3.75A) at Vin = 24V. Top trace: output voltage (100 mV/div.). Bottom trace: load current (5 A/div.). Current slew rate: 5 A/s. Co = 450 F tantalum + 1 F ceramic. Time scale: 0.2 ms/div. SQ24 Family DS Ver 5 05-14-04 USA Toll Free 866 WOW-didt Page 48 of 70 SQ24 Series Data Sheet SQ24T/S15018 (1.8 Volts Out) iS 10 H source inductance Vsource iC 33 F ESR <1 electrolytic capacitor SemiQ Family TM DC/DC Converter 1 F ceramic Vout capacitor Fig. 1.8V.13: Output voltage ripple (20 mV/div.) at full rated load current into a resistive load with Co = 10 F tantalum + 1uF ceramic and Vin = 24V. Time scale: 1 s/div. Fig. 1.8V.14: Test Set-up for measuring input reflected ripple currents, ic and is. Fig. 1.8V.15: Input reflected ripple current, ic (100 mA/div.), measured at input terminals at full rated load current and Vin = 24V. Refer to Fig. 1.8V.14 for test setup. Time scale: 1 s/div. Fig. 1.8V.16: Input reflected ripple current, is (10 mA/div.), measured through 10 H at the source at full rated load current and Vin = 24V. Refer to Fig. 1.8V.14 for test setup. Time scale: 1s/div. SQ24 Family DS Ver 5 05-14-04 USA Toll Free 866 WOW-didt Page 49 of 70 SQ24 Series Data Sheet SQ24T/S15018 (1.8 Volts Out) 3 Vout [Vdc] 2 1 0 0 5 10 15 20 Iout [Adc] Fig. 1.8V.17: Output voltage vs. load current showing current limit point and converter shutdown point. Input voltage has almost no effect on current limit characteristic. SQ24 Family DS Ver 5 05-14-04 Fig. 1.8V.18: Load current (top trace, 20 A/div., 20 ms/div.) into a 10 m short circuit during restart, at Vin = 24V. Bottom trace (20 A/div., 2 ms/div.) is an expansion of the on-time portion of the top trace. USA Toll Free 866 WOW-didt Page 50 of 70 SQ24 Series Data Sheet Electrical Specifications: SQ24T/S15015 (1.5 Volts Out) Conditions: TA=25C, Airflow=300 LFM (1.5 m/s), Vin=24Vdc, Vout=1.5 Vdc unless otherwise specified. PARAMETER INPUT CHARACTERISTICS Maximum Input Current Input Stand-by Current Input No Load Current (0 load on the output) Input Reflected-Ripple Current Input Voltage Ripple Rejection NOTES MIN 15 Adc, 1.5 Vdc Out @ 18 Vdc In Vin = 24V, converter disabled Vin = 24V, converter enabled 25MHz bandwidth 120Hz TYP MAX UNITS 1.6 Adc mAdc mAdc mAPK-PK dB 1.500 1.515 Vdc 2 2 4 4 1.523 50 15,000 15 20 40 5.3 mV mV Vdc mVPK-PK F Adc Adc A Arms 2.6 48 6 TBD OUTPUT CHARACTERISTICS Output Voltage Set Point (no load) Output Regulation Over Line Over Load Output Voltage Range Output Ripple and Noise - 25MHz bandwidth External Load Capacitance Output Current Range Current Limit Inception Peak Short-Circuit Current RMS Short-Circuit Current 1.485 2 Over line, load and temperature Full load + 10 F tantalum + 1 F ceramic Plus full load (resistive) 1.477 30 0 Non-latching Non-latching. Short=10m. Non-latching 18 30 Co = 1 F ceramic Co = 450 F tant. + 1 F ceramic 80 120 170 mV mV s 83 83 % % DYNAMIC RESPONSE Load Change 25% of Iout Max, di/dt = 0.1 A/S di/dt = 5 A/S Setting Time to 1% EFFICIENCY 100% Load 50% Load Additional Notes: 2. -40C to 85C SQ24 Family DS Ver 5 05-14-04 USA Toll Free 866 WOW-didt Page 51 of 70 SQ24 Series Data Sheet 20 20 15 15 Load Current [Adc] Load Current [Adc] SQ24T/S15015 (1.5 Volts Out) 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 5 0 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 5 0 20 30 40 50 60 70 80 90 20 30 Ambient Temperature [C] 60 70 80 90 Fig. 1.5V.2: Available load current vs. ambient air temperature and airflow rates for SQ24T15015 converter with B height pins mounted horizontally with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. 20 20 15 15 Load Current [Adc] Load Current [Adc] 50 Ambient Temperature [C] Fig. 1.5V.1: Available load current vs. ambient air temperature and airflow rates for SQ24T15015 converter with B height pins mounted vertically with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 5 40 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 5 0 0 20 30 40 50 60 70 80 90 20 30 50 60 70 80 90 Ambient Temperature [C] Ambient Temperature [C] Fig. 1.5V.3: Available load current vs. ambient temperature and airflow rates for SQ24S15015 converter mounted vertically with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. SQ24 Family DS Ver 5 05-14-04 40 Fig. 1.5V.4: Available load current vs. ambient temperature and airflow rates for SQ24S15015 converter mounted horizontally with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. USA Toll Free 866 WOW-didt Page 52 of 70 SQ24 Series Data Sheet 0.95 0.95 0.90 0.90 0.85 0.85 Efficiency Efficiency SQ24T/S15015 (1.5 Volts Out) 0.80 0.75 0.80 0.75 36 V 24 V 18 V 0.70 70 C 55 C 40 C 0.70 0.65 0.65 0 2 4 6 8 10 12 14 16 0 2 4 Load Current [Adc] Fig. 1.5V.5: Efficiency vs. load current and input voltage for SQ24T/S15015 converter mounted vertically with air flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta = 25C. 8 10 12 14 16 Fig. 1.5V.6: Efficiency vs. load current and ambient temperature for SQ24T/S15015 converter mounted vertically with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of 200 LFM (1.0 m/s). 6.00 6.00 5.00 5.00 Power Dissipation [W] Power Dissipation [W] 6 Load Current [Adc] 4.00 3.00 2.00 36 V 24 V 18 V 4.00 3.00 2.00 70 C 55 C 40 C 1.00 1.00 0.00 0.00 0 2 4 6 8 10 12 14 16 0 2 6 8 10 12 14 16 Load Current [Adc] Load Current [Adc] Fig. 1.5V.7: Power dissipation vs. load current and input voltage for SQ24T/S15015 converter mounted vertically with air flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta = 25C. SQ24 Family DS Ver 5 05-14-04 4 Fig. 1.5V.8: Power dissipation vs. load current and ambient temperature for SQ24T/S15015 converter mounted vertically with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of 200 LFM (1.0 m/s). USA Toll Free 866 WOW-didt Page 53 of 70 SQ24 Series Data Sheet SQ24T/S15015 (1.5 Volts Out) Fig. 1.5V.9: Turn-on transient at full rated load current (resistive) with no output capacitor at Vin = 24V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage (0.5 V/div.). Time scale: 1 ms/div. Fig. 1.5V.10: Turn-on transient at full rated load current (resistive) plus 10,000 F at Vin = 24V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage (0.5 V/div.). Time scale: 1 ms/div. Fig. 1.5V.11: Output voltage response to load current stepchange (3.75 A - 7.5 A - 3.75 A) at Vin = 24V. Top trace: output voltage (100 mV/div.). Bottom trace: load current (5 A/div.). Current slew rate: 0.1 A/s. Co = 1 F ceramic. Time scale: 0.2 ms/div. Fig. 1.5V.12: Output voltage response to load current stepchange (3.75 A - 7.5 A - 3.75 A) at Vin = 24V. Top trace: output voltage (100 mV/div.). Bottom trace: load current (5 A/div.). Current slew rate: 5 A/s. Co = 450 F tantalum + 1 F ceramic. Time scale: 0.2 ms/div. SQ24 Family DS Ver 5 05-14-04 USA Toll Free 866 WOW-didt Page 54 of 70 SQ24 Series Data Sheet SQ24T/S15015 (1.5 Volts Out) iS 10 H source inductance Vsource iC 33 F ESR <1 electrolytic capacitor SemiQ Family TM DC/DC Converter 1 F ceramic Vout capacitor Fig. 1.5V.13: Output voltage ripple (20 mV/div.) at full rated load current into a resistive load with Co = 10 F tantalum + 1uF ceramic and Vin = 24V. Time scale: 1 s/div. Fig. 1.5V.14: Test Set-up for measuring input reflected ripple currents, ic and is. Fig. 1.5V.15: Input reflected ripple current, ic (100 mA/div.), measured at input terminals at full rated load current and Vin = 24V. Refer to Fig. 1.5V.14 for test setup. Time scale: 1 s/div. Fig. 1.5V.16: Input reflected ripple current, is (10 mA/div.), measured through 10 H at the source at full rated load current and Vin = 24V. Refer to Fig. 1.5V.14 for test setup. Time scale: 1s/div. SQ24 Family DS Ver 5 05-14-04 USA Toll Free 866 WOW-didt Page 55 of 70 SQ24 Series Data Sheet SQ24T/S15015 (1.5 Volts Out) 2.0 Vout [Vdc] 1.5 1.0 0.5 0 0 5 10 15 20 Iout [Adc] Fig. 1.5V.17: Output voltage vs. load current showing current limit point and converter shutdown point. Input voltage has almost no effect on current limit characteristic. SQ24 Family DS Ver 5 05-14-04 Fig. 1.5V.18: Load current (top trace, 20 A/div., 20 ms/div.) into a 10 m short circuit during restart, at Vin = 24V. Bottom trace (20 A/div., 2 ms/div.) is an expansion of the on-time portion of the top trace. USA Toll Free 866 WOW-didt Page 56 of 70 SQ24 Series Data Sheet Electrical Specifications: SQ24T/S15012 (1.2 Volts Out) Conditions: TA=25C, Airflow=300 LFM (1.5 m/s), Vin=24Vdc, Vout=1.2 Vdc unless otherwise specified. PARAMETER INPUT CHARACTERISTICS Maximum Input Current Input Stand-by Current Input No Load Current (0 load on the output) Input Reflected-Ripple Current Input Voltage Ripple Rejection NOTES MIN 15 Adc, 1.2 Vdc Out @ 18 Vdc In Vin = 24V, converter disabled Vin = 24V, converter enabled 25MHz bandwidth 120Hz TYP MAX UNITS 1.25 Adc mAdc mAdc mAPK-PK dB 1.200 1.212 Vdc 1 1 3 3 1.218 50 15,000 15 20 40 5.3 mV mV Vdc mVPK-PK F Adc Adc A Arms 2.6 43 6 TBD OUTPUT CHARACTERISTICS Output Voltage Set Point (no load) Output Regulation Over Line Over Load Output Voltage Range Output Ripple and Noise - 25MHz bandwidth External Load Capacitance Output Current Range Current Limit Inception Peak Short-Circuit Current RMS Short-Circuit Current 1.188 2 Over line, load and temperature Full load + 10 F tantalum + 1 F ceramic Plus full load (resistive) 1.182 30 0 Non-latching Non-latching. Short=10m. Non-latching 18 30 Co = 1 F ceramic Co = 450 F tant. + 1 F ceramic 90 120 200 mV mV s 81 81 % % DYNAMIC RESPONSE Load Change 25% of Iout Max, di/dt = 0.1 A/S di/dt = 5 A/S Setting Time to 1% EFFICIENCY 100% Load 50% Load Additional Notes: 2. -40C to 85C SQ24 Family DS Ver 5 05-14-04 USA Toll Free 866 WOW-didt Page 57 of 70 SQ24 Series Data Sheet 20 20 15 15 Load Current [Adc] Load Current [Adc] SQ24T/S15012 (1.2 Volts Out) 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 5 0 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 5 0 20 30 40 50 60 70 80 90 20 30 Ambient Temperature [C] 60 70 80 90 Fig. 1.2V.2: Available load current vs. ambient air temperature and airflow rates for SQ24T15012 converter with B height pins mounted horizontally with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. 20 20 15 15 Load Current [Adc] Load Current [Adc] 50 Ambient Temperature [C] Fig. 1.2V.1: Available load current vs. ambient air temperature and airflow rates for SQ24T15012 converter with B height pins mounted vertically with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 5 40 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 5 0 0 20 30 40 50 60 70 80 90 20 30 50 60 70 80 90 Ambient Temperature [C] Ambient Temperature [C] Fig. 1.2V.3: Available load current vs. ambient temperature and airflow rates for SQ24S15012 converter mounted vertically with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. SQ24 Family DS Ver 5 05-14-04 40 Fig. 1.2V.4: Available load current vs. ambient temperature and airflow rates for SQ24S15012 converter mounted horizontally with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. USA Toll Free 866 WOW-didt Page 58 of 70 SQ24 Series Data Sheet 0.95 0.95 0.90 0.90 0.85 0.85 Efficiency Efficiency SQ24T/S15012 (1.2 Volts Out) 0.80 0.75 0.80 0.75 36 V 24 V 18 V 0.70 70 C 55 C 40 C 0.70 0.65 0.65 0 2 4 6 8 10 12 14 16 0 2 4 Load Current [Adc] Fig. 1.2V.5: Efficiency vs. load current and input voltage for SQ24T/S15012 converter mounted vertically with air flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta = 25C. 8 10 12 14 16 Fig. 1.2V.6: Efficiency vs. load current and ambient temperature for SQ24T/S15012 converter mounted vertically with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of 200 LFM (1.0 m/s). 6.00 6.00 5.00 5.00 Power Dissipation [W] Power Dissipation [W] 6 Load Current [Adc] 4.00 3.00 2.00 36 V 24 V 18 V 4.00 3.00 2.00 70 C 55 C 40 C 1.00 1.00 0.00 0.00 0 2 4 6 8 10 12 14 16 0 2 6 8 10 12 14 16 Load Current [Adc] Load Current [Adc] Fig. 1.2V.7: Power dissipation vs. load current and input voltage for SQ24T/S15012 converter mounted vertically with air flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta = 25C. SQ24 Family DS Ver 5 05-14-04 4 Fig. 1.2V.8: Power dissipation vs. load current and ambient temperature for SQ24T/S15012 converter mounted vertically with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of 200 LFM (1.0 m/s). USA Toll Free 866 WOW-didt Page 59 of 70 SQ24 Series Data Sheet SQ24T/S15012 (1.2 Volts Out) Fig. 1.2V.9: Turn-on transient at full rated load current (resistive) with no output capacitor at Vin = 24V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage (0.5 V/div.). Time scale: 1 ms/div. Fig. 1.2V.10: Turn-on transient at full rated load current (resistive) plus 10,000 F at Vin = 24V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage (0.5 V/div.). Time scale: 1 ms/div. Fig. 1.2V.11: Output voltage response to load current stepchange (3.75 A - 7.5 A - 3.75 A) at Vin = 24V. Top trace: output voltage (100 mV/div.). Bottom trace: load current (5 A/div.). Current slew rate: 0.1 A/s. Co = 1 F ceramic. Time scale: 0.2 ms/div. Fig. 1.2V.12: Output voltage response to load current stepchange (3.75 A - 7.5 A - 3.75 A) at Vin = 24V. Top trace: output voltage (100 mV/div.). Bottom trace: load current (5 A/div.). Current slew rate: 5 A/s. Co = 450 F tantalum + 1 F ceramic. Time scale: 0.2 ms/div. SQ24 Family DS Ver 5 05-14-04 USA Toll Free 866 WOW-didt Page 60 of 70 SQ24 Series Data Sheet SQ24T/S15012 (1.2 Volts Out) iS 10 H source inductance Vsource iC 33 F ESR <1 electrolytic capacitor SemiQ Family TM DC/DC Converter 1 F ceramic Vout capacitor Fig. 1.2V.13: Output voltage ripple (20 mV/div.) at full rated load current into a resistive load with Co = 10 F tantalum + 1uF ceramic and Vin = 24V. Time scale: 1 s/div. Fig. 1.2V.14: Test Set-up for measuring input reflected ripple currents, ic and is. Fig. 1.2V.15: Input reflected ripple current, ic (100 mA/div.), measured at input terminals at full rated load current and Vin = 24V. Refer to Fig. 1.2V.14 for test setup. Time scale: 1 s/div. Fig. 1.2V.16: Input reflected ripple current, is (10 mA/div.), measured through 10 H at the source at full rated load current and Vin = 24V. Refer to Fig. 1.2V.14 for test setup. Time scale: 1s/div. SQ24 Family DS Ver 5 05-14-04 USA Toll Free 866 WOW-didt Page 61 of 70 SQ24 Series Data Sheet SQ24T/S15012 (1.2 Volts Out) 1.5 Vout [Vdc] 1.0 0.5 0 0 5 10 15 20 Iout [Adc] Fig. 1.2V.17: Output voltage vs. load current showing current limit point and converter shutdown point. Input voltage has almost no effect on current limit characteristic. SQ24 Family DS Ver 5 05-14-04 Fig. 1.2V.18: Load current (top trace, 20 A/div., 20 ms/div.) into a 10 m short circuit during restart, at Vin = 24V. Bottom trace (20 A/div., 2 ms/div.) is an expansion of the on-time portion of the top trace. USA Toll Free 866 WOW-didt Page 62 of 70 SQ24 Series Data Sheet Electrical Specifications: SQ24T/S15010 (1.0 Volt Out) Conditions: TA=25C, Airflow=300 LFM (1.5 m/s), Vin=24Vdc, Vout=1.0 Vdc unless otherwise specified. PARAMETER INPUT CHARACTERISTICS Maximum Input Current Input Stand-by Current Input No Load Current (0 load on the output) Input Reflected-Ripple Current Input Voltage Ripple Rejection NOTES MIN 15 Adc, 1.0 Vdc Out @ 18 Vdc In Vin = 24V, converter disabled Vin = 24V, converter enabled 25MHz bandwidth 120Hz TYP MAX UNITS 1.1 Adc mAdc mAdc mAPK-PK dB 1.000 1.010 Vdc 1 1 2 3 1.015 50 15,000 15 20 40 5.3 mV mV Vdc mVPK-PK F Adc Adc A Arms 2.6 43 7.5 TBD OUTPUT CHARACTERISTICS Output Voltage Set Point (no load) Output Regulation Over Line Over Load Output Voltage Range Output Ripple and Noise - 25MHz bandwidth External Load Capacitance Output Current Range Current Limit Inception Peak Short-Circuit Current RMS Short-Circuit Current 0.990 2 Over line, load and temperature Full load + 10 F tantalum + 1 F ceramic Plus full load (resistive) 0.985 30 0 Non-latching Non-latching. Short=10m. Non-latching 18 30 Co = 1 F ceramic Co = 450 F tant. + 1 F ceramic 80 140 180 mV mV s 79 79 % % DYNAMIC RESPONSE Load Change 25% of Iout Max, di/dt = 0.1 A/S di/dt = 5 A/S Setting Time to 1% EFFICIENCY 100% Load 50% Load Additional Notes: 2. -40C to 85C SQ24 Family DS Ver 5 05-14-04 USA Toll Free 866 WOW-didt Page 63 of 70 SQ24 Series Data Sheet 20 20 15 15 Load Current [Adc] Load Current [Adc] SQ24T/S15010 (1.0 Volt Out) 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 5 0 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 5 0 20 30 40 50 60 70 80 90 20 30 Ambient Temperature [C] 60 70 80 90 Fig. 1.0V.2: Available load current vs. ambient air temperature and airflow rates for SQ24T15010 converter with B height pins mounted horizontally with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. 20 20 15 15 Load Current [Adc] Load Current [Adc] 50 Ambient Temperature [C] Fig. 1.0V.1: Available load current vs. ambient air temperature and airflow rates for SQ24T15010 converter with B height pins mounted vertically with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 5 40 10 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) 5 0 0 20 30 40 50 60 70 80 90 20 30 50 60 70 80 90 Ambient Temperature [C] Ambient Temperature [C] Fig. 1.0V.3: Available load current vs. ambient temperature and airflow rates for SQ24S15010 converter mounted vertically with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. SQ24 Family DS Ver 5 05-14-04 40 Fig. 1.0V.4: Available load current vs. ambient temperature and airflow rates for SQ24S15010 converter mounted horizontally with Vin = 24V, air flowing from pin 3 to pin 1 and maximum FET temperature 120C. USA Toll Free 866 WOW-didt Page 64 of 70 SQ24 Series Data Sheet 0.95 0.95 0.90 0.90 0.85 0.85 Efficiency Efficiency SQ24T/S15010 (1.0 Volt Out) 0.80 0.75 0.80 0.75 36 V 24 V 18 V 0.70 70 C 55 C 40 C 0.70 0.65 0.65 0 2 4 6 8 10 12 14 16 0 2 4 Load Current [Adc] Fig. 1.0V.5: Efficiency vs. load current and input voltage for SQ24T/S15010 converter mounted vertically with air flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta = 25C. 8 10 12 14 16 Fig. 1.0V.6: Efficiency vs. load current and ambient temperature for SQ24T/S15010 converter mounted vertically with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of 200 LFM (1.0 m/s). 6.00 6.00 5.00 5.00 Power Dissipation [W] Power Dissipation [W] 6 Load Current [Adc] 4.00 3.00 2.00 36 V 24 V 18 V 4.00 3.00 2.00 70 C 55 C 40 C 1.00 1.00 0.00 0.00 0 2 4 6 8 10 12 14 16 0 2 6 8 10 12 14 16 Load Current [Adc] Load Current [Adc] Fig. 1.0V.7: Power dissipation vs. load current and input voltage for SQ24T/S15010 converter mounted vertically with air flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta = 25C. SQ24 Family DS Ver 5 05-14-04 4 Fig. 1.0V.8: Power dissipation vs. load current and ambient temperature for SQ24T/S15010 converter mounted vertically with Vin = 24V and air flowing from pin 3 to pin 1 at a rate of 200 LFM (1.0 m/s). USA Toll Free 866 WOW-didt Page 65 of 70 SQ24 Series Data Sheet SQ24T/S15010 (1.0 Volt Out) Fig. 1.0V.9: Turn-on transient at full rated load current (resistive) with no output capacitor at Vin = 24V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage (0.5 V/div.). Time scale: 1 ms/div. Fig. 1.0V.10: Turn-on transient at full rated load current (resistive) plus 10,000F at Vin = 24V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage (0.5 V/div.). Time scale: 1 ms/div. Fig. 1.0V.11: Output voltage response to load current stepchange (3.75 A - 7.5 A - 3.75 A) at Vin = 24V. Top trace: output voltage (100 mV/div.). Bottom trace: load current (5 A/div.). Current slew rate: 0.1 A/s. Co = 1 F ceramic. Time scale: 0.2 ms/div. Fig. 1.0V.12: Output voltage response to load current stepchange (3.75 A - 7.5 A - 3.75 A) at Vin = 24V. Top trace: output voltage (100 mV/div.). Bottom trace: load current (5 A/div.). Current slew rate: 5 A/s. Co = 450 F tantalum + 1 F ceramic. Time scale: 0.2 ms/div. SQ24 Family DS Ver 5 05-14-04 USA Toll Free 866 WOW-didt Page 66 of 70 SQ24 Series Data Sheet SQ24T/S15010 (1.0 Volt Out) iS 10 H source inductance Vsource iC 33 F ESR <1 electrolytic capacitor SemiQ Family TM DC/DC Converter 1 F ceramic Vout capacitor Fig. 1.0V.13: Output voltage ripple (20 mV/div.) at full rated load current into a resistive load with Co = 10 F tantalum + 1uF ceramic and Vin = 24V. Time scale: 1 s/div. Fig. 1.0V.14: Test Set-up for measuring input reflected ripple currents, ic and is. Fig. 1.0V.15: Input reflected ripple current, ic (100 mA/div.), measured at input terminals at full rated load current and Vin = 24V. Refer to Fig. 1.0V.14 for test setup. Time scale: 1 s/div. Fig. 1.0V.16: Input reflected ripple current, is (10 mA/div.), measured through 10 H at the source at full rated load current and Vin = 24V. Refer to Fig. 1.0V.14 for test setup. Time scale: 1s/div. SQ24 Family DS Ver 5 05-14-04 USA Toll Free 866 WOW-didt Page 67 of 70 SQ24 Series Data Sheet SQ24T/S15010 (1.0 Volt Out) 1.5 Vout [Vdc] 1.0 0.5 0 0 5 10 15 20 Iout [Adc] Fig. 1.0V.17: Output voltage vs. load current showing current limit point and converter shutdown point. Input voltage has almost no effect on current limit characteristic. SQ24 Family DS Ver 5 05-14-04 Fig. 1.0V.18: Load current (top trace, 20 A/div., 20 ms/div.) into a 10 m short circuit during restart, at Vin = 24V. Bottom trace (20 A/div., 2 ms/div.) is an expansion of the on-time portion of the top trace. USA Toll Free 866 WOW-didt Page 68 of 70 SQ24 Series Data Sheet Physical Information SQ24S Platform Notes * * * 1 8 7 TOP VIEW 2 * * 6 5 3 All dimensions are in inches [mm] Connector Material: Copper Connector Finish: Gold over Nickel Optional: Tin/Lead over Nickel Converter Weight: 0.53 oz [15 g] Recommended Surface-Mount Pads: Min. 0.080" X 0.112" [2.03 x 2.84] Max. 0.092" X 0.124" [2.34 x 3.15] 4 Pad/Pin Connections Pad/Pin # 1 2 3 4 5 6 7 8 SIDE VIEW SQ24S Pinout (Surface Mount) Height Option A B C D E 1 Function Vin (+) ON/OFF Vin (-) Vout (-) SENSE(-) TRIM SENSE(+) Vout (+) HT (Max. Height) +0.000 [+0.00] -0.038 [- 0.97] 0.319 [8.10] 0.352 [8.94] 0.516 [13.11] 0.416 [10.57] 0.298 [7.57] CL (Min. Clearance) +0.016 [+0.41] -0.000 [- 0.00] 0.030 [0.77] 0.063 [1.60] 0.227 [5.77] 0.127 [3.23] 0.009 [0.23] 8 7 2 TOP VIEW 6 Pin Option 5 4 3 A B C SIDE VIEW PL Pin Length 0.005 [0.13] 0.188 [4.77] 0.145 [3.68] 0.110 [2.79] SQ24T Platform Notes * * SQ24T Pinout (Through-hole) * * * * SQ24 Family DS Ver 5 05-14-04 USA Toll Free 866 WOW-didt All dimensions are in inches [mm] Pins 1-3 and 5-7 are O 0.040" [1.02] with O 0.078" [1.98] shoulder Pins 4 and 8 are O 0.062" [1.57] without shoulder Pin material: Brass Pin Finish: Tin/Lead over Nickel Converter Weight: 0.53 oz [15 g] Page 69 of 70 SQ24 Series Data Sheet Converter Part Numbering Scheme Product Series Input Voltage Mounting Scheme Rated Load Current Output Voltage SQ 24 T 05 080 15 15 A (1.0 - 3.3 V) One-Eighth Brick Format S Surface Mount 18-36 V T Throughhole 10 10 A (5.0 V) 08 8 A (6.0 V) 05 5.3 A (8.0 V) 04 4 A (12.0 V) 1. 2. 010 1.0 V 012 1.2 V 015 1.5 V 018 1.8 V 020 2.0 V 025 2.5 V 033 3.3 V 050 5.0 V 060 6.0 V 080 8.0 V 120 12.0 V - ON/OFF Logic Maximum Height [HT] Pin Length [PL] Special Features N B A 0 N Negative P Positive SMT S 0.289" Through hole A 0.319" B 0.352" C 0.516" D 0.416" E 0.298" 0 STD SMT 0 0.00" Through hole A 0.188" B 0.145" C 0.110" S SMC Tin/Lead over Nickel T Special 2 Trim (For 1.2V & 1.0V only) The example above describes P/N SQ24T05080-NBA0: 18-36 V input, through-hole mounting, 5.3 A @ 8.0 V output, negative ON/OFF logic, a maximum height of 0.352", and a through the board pin length of 0.188". Please consult factory regarding availability of a specific version. For definitions, operation, and associated trim equations for all trim options, please refer to Application Note 103, Trim Feature for Isolated dc-dc converters. For more information please contact di/dt, a Power-One company 1822 Aston Avenue ** Carlsbad, CA ** 92008 ** USA USA Toll Free 866-WOW-didt (969-3438) www.didt.com ** support@didt.com The information and specifications contained in this data sheet are believed to be accurate and reliable at the time of publication. However, Power-One, Inc. assumes no responsibility for its use or for any infringements of patents or other rights of third parties, which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Power-One, Inc. Specifications are subject to change without notice. (c)Copyright Power-One, Inc. 2004 SQ24 Family DS Ver 5 05-14-04 USA Toll Free 866 WOW-didt Page 70 of 70