S-8363 Series www.sii-ic.com STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM / PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_00 (c) Seiko Instruments Inc., 2010 The S-8363 Series is a CMOS step-up switching regulator which consists of a reference voltage source, an oscillation circuit, an error amplifier, a phase compensation circuit, a current limit circuit, and a start-up circuit. Due to the operation of the PWM / PFM switching control, pulses are skipped under the light load operation and the S-8363 Series prevents decrease in efficiency caused by IC's operating current. The S-8363 Series is capable of start-up from 0.9 V (IOUT = 1 mA) by the start-up circuit, and is suitable for applications which use one dry cell. The output voltage is freely settable from 1.8 V to 5.0 V by external parts. Ceramic capacitors can be used for output capacitor. Small packages SNT-6A and SOT-23-6 enable high-density mounting. Features * Low operation voltage * Oscillation frequency * Input voltage range * Output current * Reference voltage * Efficiency * Soft start function * Low current consumption * Duty ratio * Power-off function * Current limit circuit * Nch power MOS FET ON resistance * Start-up function *1 * Lead-free, Sn 100%, halogen-free *1. : Start-up from 0.9 V (IOUT = 1 mA) guaranteed : 1.2 MHz : 0.9 V to 4.5 V : 300 mA (VIN = 1.8 V, VOUT = 3.3 V) : 0.6 V2.5% : 85% : 1.2 ms typ. : During switching-off, 95 A typ. : PWM / PFM switching control max.88% : Current consumption during power-off 3.0 A max. : limits the peak value of inductor current : 0.25 typ. : Operation with fixed duty pulse under the VOUT voltage of 1.4 V or less Refer to " Product Name Structure" for details. Applications * MP3 players, digital audio players * Digital cameras, GPS, wireless transceiver * Portable devices Packages * SNT-6A * SOT-23-6 Seiko Instruments Inc. 1 STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_00 S-8363 Series Block Diagram L = 2.2 H SD VOUT VOUT CONT VIN ON/OFF Internal SLOPE Compensation Power Supply Oscillation Circuit ON/OFF Circuit Current Limit Circuit Error Amplifier - VIN VIN MUX CIN Start-up Circuit Switching Control Circuit + PWM Reference Comparator Voltage Source Figure 1 Seiko Instruments Inc. RFB1 COUT 10 F FB + - VSS 2 STU Mode Circuit VOUT CFB RFB2 STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_00 S-8363 Series Product Name Structure Users can select the packages for the S-8363 Series. Refer to "1. Product name" regarding the contents of product name, "2. Package" regarding the package drawings and "3. Product list" regarding the product type. 1. Product name S-8363B - xxxx U 2 Environmental code U: Lead-free (Sn 100%), halogen-free Package name (abbreviation) and IC packing specification *1 I6T1: SNT-6A, Tape M6T1: SOT-23-6, Tape *1. Refer to the tape specification. 2. Package Package name 3. Drawing code Package Tape Reel Land SNT-6A PG006-A-P-SD PG006-A-C-SD PG006-A-R-SD PG006-A-L-SD SOT-23-6 MP006-A-P-SD MP006-A-C-SD MP006-A-R-SD - Product list Table 1 Remark SNT-6A SOT-23-6 S-8363B-I6T1U2 S-8363B-M6T1U2 Please select products of environmental code = U for Sn 100%, halogen-free products. Seiko Instruments Inc. 3 STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_00 S-8363 Series Pin Configurations Table 2 SNT-6A Top view 1 6 2 5 3 4 Pin No. Symbol 1 FB 2 VSS 3 CONT 4 VIN 5 VOUT 6 ON / OFF SNT-6A Description Output voltage feedback pin GND pin External inductor connection pin IC power supply pin Output voltage pin Power-off pin Figure 2 "H" : Power-on (normal operation) "L" : Power-off (standby) Table 3 SOT-23-6 Pin No. Symbol Top view 6 1 5 2 4 3 Description Power-off pin 1 ON / OFF 2 VOUT 3 VIN 4 CONT 5 VSS 6 FB Figure 3 4 SOT-23-6 Seiko Instruments Inc. "H" : Power-on (normal operation) "L" : Power-off (standby) Output voltage pin IC power supply pin External inductor connection pin GND pin Output voltage feedback pin STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_00 S-8363 Series Absolute Maximum Ratings Table 4 Absolute Maximum Ratings (Ta = +25C, VSS = 0 V unless otherwise specified) Item VIN pin voltage Symbol Absolute Maximum Ratings Unit VIN VSS-0.3 to VSS+5.0 V VOUT pin voltage VOUT VSS-0.3 to VSS+6.0 V FB pin voltage VFB VSS-0.3 to VOUT+0.3 V CONT pin voltage VCONT VSS-0.3 to VSS+6.0 V ON/OFF pin voltage VON / OFF VSS-0.3 to VIN+0.3 V 400*1 mW *1 mW Power Dissipation SNT-6A PD SOT-23-6 Operating ambient temperature 650 Topr Storage temperature Tstg *1. When mounted on board [Mounted board] (1) Board size : 114.3 mm x 76.2 mm x t1.6 mm (2) Name : JEDEC STANDARD51-7 -40 to +85 C -40 to +125 C Caution The absolute maximum ratings are rated values exceeding which the product could suffer physical damage. These values must therefore not be exceeded under any conditions. Power Dissipation (PD) [mW] 700 600 SOT-23-6 500 400 300 200 SNT-6A 100 0 0 50 100 150 Ambient Temperature (Ta) [C] Figure 4 Package Power Dissipation (When Mounted on Board) Seiko Instruments Inc. 5 STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_00 S-8363 Series Electrical Characteristics Table 5 Item Operating start voltage*1 Operating input voltage Output voltage range FB voltage FB voltage temperature coefficient FB pin input current Current consumption during operation Current consumption during switching off Electrical Characteristics (VIN = 1.8 V, VOUT = 3.3 V, Ta = +25C unless otherwise specified) Test Conditions Min. Typ. Max. Unit Circuit IOUT = 1 mA, VOUT(S)*2 = 3.3 V 0.9 V 2 4.5 V 2 1.8 5.0 V 2 0.585 0.600 0.615 V 1 Symbol VST VIN VOUT(R) VFB VFB Ta IFB IIN1 ISS1 IIN2 ISS2 Ta = -40C to +85C VOUT = 1.8 V to 5.5 V, FB pin During switching, at no load *3 VFB = VFB(S) x 0.95 During switching stop VFB = VFB(S)x 1.1 VON / OFF = 0 V, ISSS VIN = VOUT = 4.5 V fOSC MaxDuty VFB = VFB(S) x 0.95 PFMDuty RNFET VON / OFF = 0 V ILSW ILIM VIN = 1.8 V to 4.5 V, ON/OFF pin VSH VIN = 1.8 V to 4.5 V, ON/OFF pin VSL VIN = 1.8 V to 4.5 V, ON/OFF pin ISH VIN = 1.8 V to 4.5 V, ON/OFF pin ISL 100 ppm/C 1 -0.1 6 450 6 95 0.1 15 650 15 150 A A A A A 1 1 1 1 1 Current consumption during 3.0 A 1 power-off Oscillation frequency 1.0 1.2 1.4 MHz 2 Maximum duty ratio 82 88 94 % 2 PWM / PFM switching duty ratio 13 % 2 *4 Power MOS FET ON resistance 0.25 1 0.01 0.5 A 1 Power MOS FET leakage current Limited current 0.9 1.1 1.3 A 3 High level input voltage 0.75 V 1 0.25 V 1 Low level input voltage High level input current -0.1 0.1 A 1 Low level input current -0.1 0.1 A 1 Soft-start time*5 0.6 1.2 1.8 ms 2 tSS *1. This is the guaranteed value measured with external parts shown in "Table 6 External Parts List" and with test circuits shown in Figure 6. The operating start voltage varies largely depending on diode's forward voltage. Perform sufficient evaluation with actual application. *2. VOUT(S) can be set by the ratio of VFB value and the output voltage setting resistors (RFB1, RFB2). For details, refer to " External Parts Selection". *3. VFB(S) is a setting value for FB voltage. *4. Power MOS FET ON resistance largely varies depending on the VOUT voltage. *5. This is when the VOUT voltage startups from the STU release voltage or more. The soft-start time largely varies depending on the load current and the input voltage when the S-8363 Series startups from the STU release voltage or less, because the S-8363 Series once enters the start-up mode. Refer to " 2. Low voltage start-up" for STU release voltage. External Parts List When Measuring Electrical Characteristics Table 6 Element name Inductor Diode Input capacitor Output capacitor FB pin capacitor Output voltage setting resistor 1 Output voltage setting resistor 2 6 Symbol L SD CIN COUT CFB RFB1 RFB2 External Parts List Constants 2.2 H 1 F 10 F 47 pF 68 k 15 k Manufacturer TDK Corporation TOSHIBA CORPORATION TAIYO YUDEN Co., Ltd. TAIYO YUDEN Co., Ltd. TAIYO YUDEN Co., Ltd. ROHM Co., Ltd. ROHM Co., Ltd. Seiko Instruments Inc. Part number VLF302510 CRS08 EMK107B7105KA LMK212BJ106KD UMK105CH470JV MCR03 series MCR03 series STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_00 S-8363 Series Test Circuits 1. A A VIN COUT VOUT CONT FB CIN ON/OFF A S-8363 Series A A VSS Figure 5 2. L VOUT SD VIN CFB CONT VOUT RFB1 CIN ON/OFF S-8363 Series COUT FB V IOUT RFB2 VSS Figure 6 3. COUT VIN ON/OFF CONT VOUT S-8363 FB Series COUT CIN VSS Figure 7 Seiko Instruments Inc. 7 STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_00 S-8363 Series Operation 1. Switching control method The S-8363 Series switching regulator automatically switches between the pulse width modulation method (PWM) and pulse frequency modulation method (PFM) according to the load current. A low ripple power can be supplied by operating on PWM control for which the pulse width changes up to 88% in the range where the output load current is large. The S-8363 Series operates on PFM control when the output load current is small and the pulses are skipped according to the amount of the load current. Therefore, the oscillation circuit intermittently oscillates, reducing the self-current consumption. This prevents decrease in efficiency when the output load current is small. The ripple voltage during the PFM control is very small, so that the S-8363 Series realizes high efficiency and the low-noise power supply. The point at which PWM control switches to PFM control varies depending on the external element (inductor, diode, etc.), input voltage value, and output voltage value, and this method achieves high efficiency in the output load current of about 100 A. 8 Seiko Instruments Inc. STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_00 S-8363 Series 2. Low voltage start-up 2. 1 Start-up circuit The S-8363 Series can startup from 0.9 V. When the VOUT voltage at ON / OFF = "H" does not reach the STU release voltage, the start-up circuit starts the operation and outputs the fixed duty pulse to the CONT pin. By this, the VOUT voltage starts step-up. After that, the VOUT voltage reaches the STU release voltage and the STU mode circuit is set in STU release condition, therefore, the switching control circuit starts stable operation due to the soft-start function. Simultaneously, the start-up circuit is set in disable condition, so that the S-8363 Series prevents excessive current consumption. 2. 2 Start-up mode (STU mode) circuit The STU mode circuit monitors the VOUT voltage, and switches the operation modes between start-up period and normal control period of the switching control circuit. The STU release voltage is internally fixed at 1.4 V (typ.), and has hysteresis of approx. 0.15 V. When the VOUT voltage decreases to 1.25 V (typ.) from release condition, the STU mode circuit is set in the STU detection condition, shifting to the start-up period. Several s to several ten s is taken to shift from STU release to PWM release. During this the step-up operation is not performed, therefore, the VOUT voltage may largely decrease depending on the size of load. During applying ON / OFF = "L", the STU mode circuit is set in disable condition, so that the S-8363 Series prevents excessive current consumption. L = 2.2 H SD VOUT VOUT CONT VD COUT 10 F STU Mode Circuit Load Switching Control Circuit VIN VIN MUX Start-up Circuit VSS Figure 8 Start-up Circuit Switching delay STU release STU detection Output voltage (VOUT) CONT voltage (VCONT) Start-up period PWM control period Time [s] Figure 9 Start-up Sequence Seiko Instruments Inc. 9 STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_00 S-8363 Series 2. 3 Schottky barrier diode A schottky barrier diode (SD) is necessary to operate the S-8363 Series. The VOUT pin also works as the power supply pin. The voltage applied on the VOUT pin when ON / OFF = "L" is VIN - VD. VD is forward voltage for step-down of SD, and largely varies depending on the forward current If of SD and ambient temperature, but Vd is approx. 0.2 V to 0.5 V. When the S-8363 Series startups from 0.9 V, use a SD with specially low VD. When using CRS08 for the S-8363 Series, start-up is guaranteed when Ta = +25C and a load current of 1 mA. Satisfy the following conditions when using other SDs. * Low forward voltage (VD) * High switching speed * Reverse withstand voltage of VOUT + spike voltage or more * Rated current of IPK or more Table 7 Typical Schottky Diodes Manufacturer TOSHIBA CORPORATION ROHM Co., Ltd. Remark Name CRS02 CRS08 RB161M-20TR RB051LA-40TR RB070M-30TR RB161SS-20T2R Generally, in diodes with low forward volage VD, reverse leakage current Ir tends to increases. Especially, increase of Ir in high temperature is significant. To prevent decrease in efficiency, choose a diode with low Ir when low voltage start-up is unnecessary. 10 Seiko Instruments Inc. STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_00 S-8363 Series 3. Soft-start function The S-8363 Series has the built-in soft-start circuit. When power-on (connecting ON / OFF to VIN) or after start-up at ON / OFF = "H", the output voltage (VOUT) gradually rises, suppressing rush current and overshoot of the output voltage. In the S-8363 Series, the soft-start time (tss) is from start-up to the time to reach 90% of the VOUT output voltage setting value (VOUT(S)). A reference voltage adjustment method is adopted as the soft-start method, the reference voltage gradually rises from 0 V simultaneously with start of the soft-start. The soft-start circuit has two operation modes which is selected according to the VOUT voltage at start-up. 3.1 VOUT voltage at start-up > STU release voltage The soft-start starts when the reference voltage gradually rises after ON / OFF = "H". Input voltage (VIN) 0V Soft-start time (tss) VOUT x 0.90 STU release Output voltage (VOUT) 0V Reference voltage from 0V error amplifier ON/OFF voltage 0 V Soft-start period Time [s] Figure 10 Seiko Instruments Inc. 11 STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_00 S-8363 Series 3. 2 VOUT voltage at start-up < STU release voltage After ON / OFF ="H", step-up starts by the start-up operation. When the VOUT voltage reaches the STU release voltage, the soft-start starts. Since the length of the start-up period largely varies depending on the input voltage, load current, external parts and ambient temperature, the soft-start time varies according to them. Perform sufficient evaluation with actual application. Input voltage (VIN) 0V Soft-start time (tss) Output voltage (VOUT) VOUT x 0.90 STU release Reference voltage from 0V error amplifier Start-up period 0V ON/OFF voltage Soft-start period 0V Time [s] Figure 11 12 Seiko Instruments Inc. STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_00 S-8363 Series 3. 3 Condition of performing soft-start again The condition to reset after the reference voltage once rises (reference voltage from error amplifier = 0 V) is to set the ON / OFF pin voltage to "L". Setting ON / OFF = "H" starts soft-start again. When the VOUT voltage drops and decreases more than the STU detection voltage by an overload, the soft-start circuit shifts to the start-up period. When the VOUT voltage is restored by releasing overload, the soft-start function is performed. If the VOUT voltage is not decreased less than the STU detection voltage, the soft-start function is not performed when restoration. VOUT(S) Output voltage(VOUT) STU release STU detection 0V Reference voltage from error amplifier 0 V Load current (IOUT) 0A ON/OFF voltage 0V <4> <1> <2> <3> <4> <1> <2> <3> <1> <2> Time [s] <1> Start-up period <2> Soft-start period <3> Normal operation period <4> Reset period Figure 12 Reset Condition for Soft-Start Seiko Instruments Inc. 13 STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_00 S-8363 Series 4. Power-off pin This pin stops or starts step-up operations. When the ON / OFF pin is set to the low level, the internal driver of the CONT pin is turned off and all internal circuits stop substantially reducing the current consumption. The ON / OFF pin is set up as shown in Figure 13 and is internally pulled down by using the depression transistor, so all circuits stop even if this pin is floating. Do not apply a voltage of between 0.25 V and 0.75 V to the ON / OFF pin because applying such a voltage increases the current consumption. If the ON / OFF pin is not used, connect it to the VIN pin. Table 8 CR oscillation circuit Operates Stops ON/OFF pin "H" "L" VIN Output voltage Set value VIN - VD VIN ON/OFF VSS Figure 13 5. Current limit circuit A current limit circuit is built in the S-8363 Series. The current limit circuit monitors the current that flows in the Nch power MOS FET and limits current in order to prevent thermal destruction of the IC due to an overload or magnetic saturation of the inductor. When a current exceeding the current limit detection value flows in the Nch power MOS FET, the current limit circuit operates and turns off the Nch power MOS FET since the current limit detection until one clock of the oscillator ends. The Nch power MOS FET is turned on in the next clock and the current limit circuit resumes current detection operation. If the value of the current that flows in the Nch power MOS FET remains the current limit detection value or more, the current limit circuit functions again and the same operation is repeated. Once the value of the current that flows in the Nch power MOS FET is lowered up to the specified value, the normal operation status restores. The current limit detection value is fixed to 1.1 A (typ.) in the IC. However, under the condition that ON duty is small, between the detection delay time of the current limit circuit and the ON time of the Nch power MOS FET, the difference is small. Therefore, the current value which is actually limited is increased. Usually, when the difference between the VIN pin and VOUT pin is small, on duty is decreased and the limited current value is increased. 14 Seiko Instruments Inc. STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_00 S-8363 Series Operation Principles The S-8363 Series is a step-up switching regulator. Figure 14 shows the basic circuit diagram. Step-up switching regulators start current supply by the input voltage (VIN) when the Nch power MOS FET is turned on and holds energy in the inductor at the same time. When the Nch power MOS FET is turned off, the CONT pin voltage is stepped up to discharge the energy held in the inductor and the current is discharged to VOUT through the diode. When the discharged current is stored in COUT, a voltage is generated, and the potential of VOUT increases until the voltage of the FB pin reaches the same potential as the internal reference voltage. For the PWM control method, the switching frequency (fOSC) is fixed and the VOUT voltage is held constant according to the ratio of the ON time and OFF time (ON duty) of the Nch power MOS FET in each period. In the PWM control method, the VOUT voltage is held constant by controlling the ON time. In the PFM control method, the Nch power MOS FET is turned on by fixed duty. When energy is discharged to VOUT once and the VOUT potential exceeds the set value, the Nch power MOS FET stays in the off status until VOUT decreases to the set value or less due to the load discharge. Time VOUT decreases to the set value or less depends on the amount of load current, so, the switching frequency varies depending on this current. I2 SD L IOUT VOUT VIN I1 CONT Nch power MOS FET FB VSS Figure 14 COUT RL Basic Circuit of Step-up Switching Regulator The ON duty in the current continuous mode can be calculated by using the equation below. Use the S-8363 Series in the range where the ON duty is less than the maximum duty. The maximum duty is 88% (typ.). ON duty = 1 - VIN VOUT + VD*1 x 100 [%] *1. VD : Forward voltage of diode Seiko Instruments Inc. 15 STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_00 S-8363 Series 1. Continuous current mode The following explains the current that flows into the inductor when the step-up operation stabilizes in a certain status and IOUT is sufficiently large. When the Nch power MOS FET is turned on, current (I1) flows in the direction shown in Figure 14. The inductor current (IL) at this time gradually increases in proportion with the ON time (tON) of the Nch power MOS FET, as shown in Figure 15. Current change of inductor within tON : IL(ON) = IL max. - IL min. VIN = L x tON When the Nch power MOS FET is turned off, the voltage of the CONT pin is stepped up to VOUT + VD and the voltage on both ends of the inductor becomes VOUT + VD - VIN. However, it is assumed here that VOUT >> VD and VD is ignored. Current change of inductor within tOFF : VOUT - VIN IL(OFF) = x tOFF L The input power equals the output power in an ideal situation where there is no loss by components. IIN(AV) : PIN = POUT IIN(AV) x VIN = IOUT x VOUT VOUT x IOUT ....................... (1) IIN(AV) = V IN The current that flows in the inductor consists of a ripple current that changes due to variation over time and a direct current. From Figure 15 : IIN(AV) : IL 2 VOUT - VIN = IIN(DC) + x tOFF 2xL VIN = IIN(DC) + x tON .............. (2) 2xL IIN(AV) = IIN(DC) + Above, the continuous mode is the operation mode when IIN(DC) > 0 as shown in Figure 15 and the inductor current continuously flows. While the output current (IOUT) continues to decrease, IIN(DC) reaches 0 as shown in Figure 16. This point is the critical point of the continuous mode. As shown in equations (1) and (2), the direct current component (IIN(DC)) depends on IOUT. IOUT(0) when IIN(DC) reaches 0 (critical point) : tON x VIN2 IOUT(0) = 2 x L x VOUT When the output current decreases below IOUT(0), the current flowing in the inductor stops flowing in the tOFF period as shown in Figure 17. This is the discontinuous mode. 16 Seiko Instruments Inc. STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_00 S-8363 Series IL IL max. IIN(AV) IL min. IIN(DC) t tON tOFF t = 1 / fOSC Figure 15 Continuous Mode (Current Cycle of Inductor Current IL) IL IL max. IL min. t tON tOFF t = 1 / fOSC Figure 16 Critical Point (Current Cycle of Inductor Current IL) IL IL max. IL min. t tON tOFF t = 1 / fOSC Figure 17 Discontinuous Mode (Current Cycle of Inductor Current IL) Seiko Instruments Inc. 17 STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_00 S-8363 Series External Parts Selection 1. Inductor The recommended L value of the S-8363 Series is 2.2 H. Caution When selecting an inductor, be careful about its allowable current. If a current exceeding the allowable current flows through the inductor, magnetic saturation occurs, substantially lowering the efficiency and destroying ICs due to large current. Therefore, select an inductor such that IPK does not exceed the allowable current. The following equations express IPK in the ideal statuses in the discontinuous and continuous modes : 2 x IOUT x (VOUT + VD*2 - VIN) fOSC*1 x L *2 *2 VOUT + VD (VOUT + VD - VIN) x VIN x I IPK = *2 *1 OUT + VIN 2 x (VOUT + VD ) x fOSC x L IPK = *1. *2. (Discontinuous mode) (Continuous mode) fOSC : oscillation frequency VD is the forward voltage of a diode. The reference value is 0.4 V. However, current exceeding the above equation flows because conditions are practically not ideal. Perform sufficient evaluation with actual application. Table 9 Manufacturer TDK Corporation Name Typical Inductors Size (L x W x H[mm] L value Direct resistor Rated current VLF302510-2R2M 2.2 H 0.084 max. 1.23 A max. 3.0 x 2.5 x 1.0 VLS3010T-2R2M 2.2 H 0.116 max. 1.2 A max. 3.0 x 3.0 x 1.0 VLS201610E 2.2 H 0.276 max. 0.94 A max. 2.0 x 1.6 x 0.95 MLP2012S2R2M 2.2 H 0.300 max. 0.8 A max. 2.0 x 1.25 x 1.0 Coilcraft, Inc LPS3010-222ML 2.2 H 0.220 max. 1.3 A max. 3.0 x 3.0 x 1.0 Murata Manufacturing LQM2HPN2R2MG0 2.2 H 0.080 25% 1.3 A max. 2.5 x 2.0 x 1.0 Co., Ltd. LQH3NPN2R2NG0 2.2 H 0.140 20% 1.25 A max. 2.7 x 3.0 x 1.0 NR3010T2R2M 2.2 H 0.114 max. 1.1 A max. 3.0 x 3.0 x1.0 NR4010T2R2N 2.2 H 0.180 max. 1.15 A max. 4.0 x 4.0 x1.0 BRL2518T2R2M 2.2 H 0.1755 max. 0.85 A max. 2.5 x 1.8 x 1.2 TAIYO YUDEN Co., Ltd. 18 Seiko Instruments Inc. STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_00 S-8363 Series 2. Diode Use an externally mounted that meets the following conditions. * Low forward voltage (Schottky barrier diode or similar types) * High switching speed * Reverse withstand voltage of VOUT + spike voltage or more * Rated current of IPK or more 3. Input capacitor (CIN) and output capacitor (COUT) To improve efficiency, an input capacitor (CIN) lowers the power supply impedance and averages the input current. Select CIN according to the impedance of the power supply used. The recommended capacitance is 1 F or more for the S-8363 Series. An output capacitor (COUT), which is used to smooth the output voltage, requires a capacitance larger than that of the step-down type because the current is intermittently supplied from the input to the output side in the step-up type. When the output voltage is low or the load current is large, enlarging an output capacitance value is required. Moreover, when the output voltage is high, connecting a 0.1 F ceramic capacitor in parallel is required. Mount near a VOUT pin as possible. The indication of an output capacitor to the setting value of VOUT voltage is shown in the table 10. Perform thorough evaluation using an actual application to set the constant when selecting parts. A ceramic capacitor can be used for both the input and output. Table 10 Recommended Output Capacitance VOUT voltage Output capacitor (COUT) < 2.5 V 10 F x 2 2.5 V to 4.0 V 10 F 4.0 V < 10 F + 0.1 F Seiko Instruments Inc. 19 STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_00 S-8363 Series 4. Output voltage setting resistors (RFB1, RFB2), capacitor for phase compensation (CFB) For the S-8363 Series, VOUT can be set to any value by using external divider resistors. Connect the divider resistors between the VOUT and VSS pins. Because VFB = 0.6 V typ., VOUT can be calculated by using the following equation : VOUT = RFB1 + RFB2 x 0.6 RFB2 Connect divider resistors RFB1 and RFB2 as close to the IC as possible to minimize the effects of noise. If noise has an effect, adjust the values of RFB1 and RFB2 so that RFB1 + RFB2 < 100 k. CFB, which is connected in parallel with RFB1, is a capacitor for phase compensation. By setting the zero point (the phase feedback) by adding capacitor CFB to output voltage setting resistor RFB1 in parallel, the phase margin increases, improving the stability of the feedback loop. To effectively use the feedback portion of the phase based on the zero point, define CFB by using the following equation : CFB L x COUT VOUT x V 3 x RFB1 DD This equation is only a guide. The following explains the optimum setting. To efficiently use the feedback portion of the phase based on the zero point, specify settings so that the phase feeds back at the zero point frequency (fzero) of RFB1 and CFB according to the phase delay at the pole frequency (fpole) of L and COUT. The zero point frequency is generally set slightly higher than the pole frequency. The following equations are used to determine the pole frequency of L and COUT and the zero point frequency set using RFB1 and CFB. 1 VDD x V OUT L x COUT 1 fzero 2 x x RFB1 x CFB fpole 2xx The transient response can be improved by setting the zero point frequency in a lower frequency range. If, however, the zero point frequency is set in a significantly lower range, the gain increases in the range of high frequency and the phase margin decreases. This might result in unstable operation. Determine the proper value after sufficient evaluation with actual application. The typical constants based on our evaluation are shown in Table 11. Table 11 VOUT(S) [V] 1.8 2.48 3.32 4.2 5.0 20 Example of Constant for External Parts VIN [V] 1.2 1.2 1.8 1.8 1.8 RFB1 [k] 30 47 68 90 110 RFB2 [k] 15 15 15 15 15 Seiko Instruments Inc. CFB [pF] 82 68 47 39 39 STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_00 S-8363 Series Standard Circuit L = 2.2 H SD VOUT VOUT CONT VIN ON/OFF Oscillation Circuit ON/OFF Circuit Internal SLOPE Compensation Power Supply Current Limit Circuit VIN VIN STU Mode Circuit VOUT CFB Error Amplifier - FB + + Switching - Control PWM Circuit Reference Comparator Voltage Source MUX CIN Start-up Circuit RFB1 COUT COUT 0.1 F 10 F RFB2 VSS Ground point Figure 18 Caution The above connection diagram and constant will not guarantee successful operation. Perform thorough evaluation using an actual application to set the constants. Precaution * Mount external capacitors and inductor as close as possible to the IC. Set single point ground. * Characteristics ripple voltage and spike noise occur in IC containing switching regulators. Moreover rush current flows at the time of a power supply injection. Because these largely depend on the inductor, the capacitor and impedance of power supply used, perform sufficient evaluation with actual application. * The 0.1 F capacitor connected between the VOUT and VSS pins is a bypass capacitor. It stabilizes the power supply in the IC when application is used with a heavy load, and thus effectively works for stable switching regulator operation. Allocate the bypass capacitor as close to the IC as possible, prioritized over other parts. * Although the IC contains a static electricity protection circuit, static electricity or voltage that exceeds the limit of the protection circuit should not be applied. * The power dissipation of the IC greatly varies depending on the size and material of the board to be connected. Perform sufficient evaluation using an actual application before designing. * SII claims no responsibility for any disputes arising out of or in connection with any infringement by products including this IC of patents owned by a third party. Seiko Instruments Inc. 21 STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_00 S-8363 Series Application Circuits Application circuits are examples. They may always not guarantee successful operation. 1. External parts for application circuits Table 12 Part Part Name VLF302510 VLS201610E Inductor MLP2012S BRL2518T2R2M CRS02 CRS08 RB070M-30TR Diode RB051LA-40TR RB161M-20TR RB161SS-20T2R LMK212BJ106KD EMK107B7105KA Capacitor C1608X5R0J106M C1608X7R1C105K * 1. DCR : * 2. IMAX : * 3. VF : * 4. IF : * 5. VR : * 6. EDC : 22 Characteristics of External Parts Manfuacturer Characteristics *1 2.2 H, DCR = 0.084 , IMAX*2 = 1.23 A, L x WxH = 3.0 x 2.5 x 1.0 mm 2.2 H, DCR*1 = 0.276 , IMAX*2 = 0.94 A, TDK Corporation L x W x H = 2.0 x 1.6 x 0.95 mm 2.2 H, DCR*1 = 0.300 , IMAX*2 = 0.8 A, L x W x H = 2.0 x 1.25 x 1.0 mm 2.2 H, DCR*1 = 0.1755 , IMAX*2 = 0.85 A, TAIYO YUDEN Co., Ltd. L x W x H = 2.5 x 1.8 x 1.2 mm VF*3 = 0.4 V typ., IF*4 = 1.0 A, VR*5 = 30 V, L x W x H = 3.5 x 1.6 x 1.08 mm TOSHIBA CORPORATION *3 *4 *5 VF = 0.32 V typ., IF = 1.5 A, VR = 30 V, L x W x H = 3.5 x 1.6 x 1.08 mm *3 *4 *5 VF = 0.44 V typ., IF = 1.5 A, VR = 30 V, L x W x H = 3.5 x 1.6 x 0.9 mm VF*3 = 0.35 V max., IF*4 = 3.0 A, VR*5 = 20 V, L x W x H = 4.7 x 2.6 x 1.05 mm ROHM Co., Ltd. *3 *4 *5 VF = 0.31 V typ., IF = 1.0 A, VR = 20 V, L x W x H = 3.5 x 1.6 x 0.9 mm VF*3 = 0.42 V, IF*4 = 3.0 A, VR*5 = 20 V, L x W x H = 1.6 x 0.8 x 0.603 mm 10 F, EDC*6 = 10 V, X5R, L x W x H = 2.0 x 1.25 x 0.95 mm TAIYO YUDEN Co., Ltd. 10 F, EDC*6 = 16 V, X7R, L x W x H = 1.6 x 0.8 x 0.90 mm 10 F, EDC*6 = 6.3 V, X5R, L x W x H = 1.6 x 0.8 x 0.9 mm TDK Corporation 1 F, EDC*6 = 16 V, X7R, L x W x H = 1.6 x 0.8 x 0.9 mm DC resistance Maximum allowable current Forward voltage Forward current Reverse voltage Rated voltage Seiko Instruments Inc. STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_00 S-8363 Series 2. A power supply started by 0.9 V Following shows a power supply example which starts up by using the final voltage (0.9 V) of dry cells and its characteristics. L SD VDD VOUT CONT VOUT CFB RFB1 COUT 0.1 F CIN ON/OFF S-8363 Series FB RFB2 VSS Figure 19 Table 13 Condition Circuit Example (For a power supply started by 0.9 V) External Parts Examples (For a power supply started by 0.9 V) Output IC Product L Product SD Product Voltage Name Name Name COUT Product Name RFB1 RFB2 CFB 1 3.3 V S-8363B VLF302510 RB161M-20TR LMK212BJ106KD 68 k 15 k 47 pF 2 3.3 V S-8363B VLF302510 RB051LA-40TR LMK212BJ106KD 68 k 15 k 47 pF 3 3.3 V S-8363B VLF302510 RB070M-30TR LMK212BJ106KD 68 k 15 k 47 pF 4 3.3 V S-8363B VLF302510 RB161SS-20T2R LMK212BJ106KD 68 k 15 k 47 pF 5 3.3 V S-8363B VLF302510 CRS02 LMK212BJ106KD 68 k 15 k 47 pF 6 3.3 V S-8363B VLF302510 CRS08 LMK212BJ106KD 68 k 15 k 47 pF Caution The above connection will not guarantee successful operation. Perform thorough evaluation using an actual application to set the constant. Seiko Instruments Inc. 23 STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_00 S-8363 Series 3. Output characteristics of power supply started by 0.9 V Following shows the (1) Load current (IOUT) vs. Operating start voltage (VST), (2) Temperature (Ta) vs. Operating start voltage (VST), (3) Load current (IOUT) vs. Efficiency (), (4) Load current (IOUT) vs. Output voltage (VOUT), characteristics for conditions 1 to 6 in Table 13. (3) Load current (IOUT) vs. Efficiency () 100 90 Condition 6 80 70 Condition 4 60 50 40 Condition 1 Condition 5 30 Condition 3 20 10 Condition 2 0 0.01 0.1 1 10 100 1000 IOUT [mA] (4) Load current (IOUT) vs. Output voltage (VOUT) 3.40 3.38 Condition 4 Condition 5 3.36 3.34 Condition 1 3.32 3.30 3.28 Condition 6 3.26 Condition 3 3.24 3.22 Condition 2 3.20 0.01 0.1 1 10 100 1000 IOUT [mA] VOUT [V] [%] 24 VST [V] (2) Temperature (Ta) vs. Operating start voltage (VST) 1.1 Condition 6 1.0 Condition 3 0.9 Condition 5 0.8 0.7 Condition 2 0.6 Condition 4 0.5 Condition 1 0.4 0 25 50 75 85 -40 -25 Ta [C] VST [V] (1) Load current (IOUT) vs. Operating start voltage (VST) 1.80 Condition 6 1.60 1.40 Condition 5 1.20 Condition 3 1.00 0.80 Condition 1 0.60 0.40 Condition 4 0.20 Condition 2 0.00 100 1 10 IOUT [mA] Seiko Instruments Inc. STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_00 S-8363 Series 4. Super-small power supply Following shows a circuit example which gives top priority to reduce the implementation area by using the small external parts and its characteristics. L VDD SD VOUT CONT VOUT CFB RFB1 CIN COUT2 ON/OFF S-8363 Series COUT1 FB RFB2 VSS Figure 20 Table 14 Circuit Example (For super-small power supply) External Parts Examples (For super-small power supply) Output IC Product L Product SD Product Voltage Name Name Name 1 1.8 V S-8363B MLP2012S 2 3.3 V S-8363B 3 1.8 V 4 3.3 V 5 6 Condition Caution COUT1 COUT2 RFB1 RFB2 CFB RB161SS-20 C1608X5R0J106M C1608X5R0J106M 30 k 15 k 82 pF MLP2012S RB161SS-20 LMK212BJ106KD 0.1 F 68 k 15 k 47 pF S-8363B VLS201610E RB161SS-20 C1608X5R0J106M C1608X5R0J106M 30 k 15 k 82 pF S-8363B VLS201610E RB161SS-20 LMK212BJ106KD 0.1 F 68 k 15 k 47 pF 1.8 V S-8363B BRL2518T2R2M RB161SS-20 C1608X5R0J106M C1608X5R0J106M 30 k 15 k 82 pF 3.3 V S-8363B BRL2518T2R2M RB161SS-20 LMK212BJ106KD 0.1 F 68 k 15 k 47 pF The above connection will not guarantee successful operation. Perform thorough evaluation using an actual application to set the constant. Seiko Instruments Inc. 25 STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_00 S-8363 Series 5. Output characteristics of super-small power supply VIN = 0.9 V VIN = 1.2 V VIN = 1.5 V 0.1 50 45 40 35 30 25 20 15 10 5 0 0.1 [%] Condition 2 100 90 80 70 60 50 40 30 20 10 0 0.01 Vr [mV] 100 1000 100 1000 1.90 1.88 1.86 1.84 1.82 1.80 1.78 1.76 1.74 1.72 1.70 VIN = 0.9 V VIN = 1.2 V VIN = 1.5 V 0.01 0.1 1 10 IOUT [mA] 100 1000 VIN = 1.5 V VIN = 1.2 V VIN = 0.9 V 0.01 1 10 IOUT [mA] VIN = 1.2 V VIN = 1.8 V VIN = 2.4 V VIN = 3.0 V 0.1 50 45 40 35 30 25 20 15 10 5 0 1 10 IOUT [mA] 100 1000 100 1000 3.40 3.38 3.36 3.34 3.32 3.30 3.28 3.26 3.24 3.22 3.20 VIN = 3.0 V VIN = 1.2 V VIN = 1.8 V VIN = 2.4 V 0.01 VIN = 3.0 V VIN = 2.4 V VIN = 1.8 V VIN = 1.2 V 0.01 26 1 10 IOUT [mA] VOUT [V] Vr [mV] [%] Condition 1 100 90 80 70 60 50 40 30 20 10 0 0.01 VOUT [V] Following shows the output current (IOUT) vs. efficiency (), output current (IOUT) vs. output voltage (VOUT), and output current (IOUT) vs. ripple voltage (Vr) characteristics for conditions 1 to 6 in Table 14. 0.1 1 10 IOUT [mA] Seiko Instruments Inc. 0.1 1 10 IOUT [mA] 100 1000 VIN = 1.5 V VIN = 1.2 V VIN = 0.9 V 0.1 50 45 40 35 30 25 20 15 10 5 0 100 1000 100 1000 1.90 1.88 1.86 1.84 1.82 1.80 1.78 1.76 1.74 1.72 1.70 VIN = 0.9 V VIN = 1.2 V VIN = 1.5 V 0.01 0.1 1 10 IOUT [mA] 100 1000 VIN = 1.5 V VIN = 1.2 V VIN = 0.9 V 0.01 0.1 [%] Condition 4 100 90 80 70 60 50 40 30 20 10 0 0.01 Vr [mV] 1 10 IOUT [mA] 1 10 IOUT [mA] VOUT [V] Vr [mV] [%] Condition 3 100 90 80 70 60 50 40 30 20 10 0 0.01 VOUT [V] STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_00 S-8363 Series VIN = 1.2 V VIN = 1.8 V VIN = 2.4 V VIN = 3.0 V 0.1 50 45 40 35 30 25 20 15 10 5 0 1 10 IOUT [mA] 100 1000 100 1000 3.40 3.38 3.36 3.34 3.32 3.30 3.28 3.26 3.24 3.22 3.20 VIN = 3.0 V VIN = 1.2 V VIN = 1.8 V VIN = 2.4 V 0.01 0.1 1 10 IOUT [mA] 100 1000 VIN = 3.0 V VIN = 2.4 V VIN = 1.8 V VIN = 1.2 V 0.01 0.1 1 10 IOUT [mA] Seiko Instruments Inc. 27 VIN = 1.5 V VIN = 1.2 V VIN = 0.9 V 0.1 50 45 40 35 30 25 20 15 10 5 0 0.1 [%] Condition 6 100 90 80 70 60 50 40 30 20 10 0 0.01 Vr [mV] 100 1000 100 1000 1.90 1.88 1.86 1.84 1.82 1.80 1.78 1.76 1.74 1.72 1.70 VIN = 0.9 V VIN = 1.2 V VIN = 1.5 V 0.01 0.1 1 10 IOUT [mA] 100 1000 100 1000 VIN = 1.5 V VIN = 1.2 V VIN = 0.9 V 0.01 1 10 IOUT [mA] VIN = 0.9 V VIN = 1.2 V VIN = 1.8 V VIN = 2.5 V 0.1 50 45 40 35 30 25 20 15 10 5 0 1 10 IOUT [mA] 100 1000 100 1000 3.40 3.38 3.36 3.34 3.32 3.30 3.28 3.26 3.24 3.22 3.20 VIN = 0.9 V VIN = 1.2 V VIN = 1.8 V VIN = 2.5 V 0.01 VIN = 2.5 V VIN = 1.8 V VIN = 1.2 V VIN = 0.9 V 0.01 28 1 10 IOUT [mA] VOUT [V] Vr [mV] [%] Condition 5 100 90 80 70 60 50 40 30 20 10 0 0.01 VOUT [V] STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_00 S-8363 Series 0.1 1 10 IOUT [mA] Seiko Instruments Inc. 0.1 1 10 IOUT [mA] STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_00 S-8363 Series Characteristics (Typical Data) 1. Examples of Major Power Supply Dependence Characteristics (Ta = +25C) (1) Current consumption during operation (IIN1) vs. Operating input voltage (VIN) Current consumption during switching off (IIN2) vs. Operating input voltage (VIN) 12 8 ISS1, ISS2 [A] IIN1, IIN2 [A] 10 (2) Current consumption during operation (ISS1) vs. Output voltage (VOUT) Current consumption during switching off (ISS2) vs. Output voltage (VOUT) 1000 900 800 700 600 ISS1 500 400 300 200 ISS2 100 0 0.0 1.0 2.0 3.0 4.0 5.0 VOUT [V] IIN1, IIN2 6 4 2 0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 VIN [V] ISSS [A] (3) Current consumption during power-off (ISSS) vs. Operating input voltage (VIN), Output voltage (VOUT) 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 VIN, VOUT [V] 4.5 5.0 (6) Maximum duty ratio (MaxDuty) vs. Output voltage (VOUT) 100 (7) Soft-start time (tSS) vs. Output voltage (VOUT) 1.5 95 1.4 90 1.3 tSS [ms] MaxDuty [%] (5) Start-up oscillation frequency (fST) vs. Operating input voltage (VIN) 500 450 400 350 300 250 200 150 100 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 VIN [V] fST [kHz] fosc [MHz] (4) Oscillation frequency (fOSC) vs. Output voltage (VOUT) 1.38 1.34 1.30 1.26 1.22 1.18 1.14 1.10 1.06 1.02 1.5 2.0 2.5 3.0 3.5 4.0 VOUT [V] 85 80 1.2 1.1 75 1.0 70 0.9 1.5 2.0 2.5 3.0 3.5 VOUT [V] 4.0 4.5 5.0 1.5 Seiko Instruments Inc. 2.0 2.5 3.0 3.5 VOUT [V] 4.0 4.5 5.0 29 STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_00 S-8363 Series VOUT = 5.0 V 5 0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 VIN [V] ILIM [mA] (10) Limited current (ILIM) vs. Operating input voltage (VIN) 1600 VOUT = 1.8 V 1400 1200 1000 800 600 VOUT = 5.0 V VOUT = 3.32 V 400 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 VIN [V] (12) Power MOS FET leakage current (ILSW) vs. Output voltage (VOUT) 0.5 IPFM [mA] 10 (9) Output current at PWM / PFM switching (IPFM) vs. Operating input voltage (VIN) 70 VOUT = 5.0 V 60 50 VOUT = 3.32 V 40 VOUT = 1.8 V 30 20 10 0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 VIN [V] (11) Maximum load current (IOUTMAX) vs. Operating input voltage (VIN) 1000 900 VOUT = 3.32 V 800 700 VOUT = 1.8 V 600 500 400 300 VOUT = 5.0 V 200 100 0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 VIN [V] IOUTMAX [mA] PFMDuty [%] (8) PWM / PFM switching duty ratio (PFMDuty) vs. Operating input voltage (VIN) 25 VOUT = 1.8 V 20 VOUT = 3.32 V 15 (13) High level input voltage (VSH) vs. Operating input voltage (VIN) 0.8 0.7 VSH [V] ILSW [A] 0.4 0.3 0.2 0.1 0.6 0.5 0.4 0.0 0.3 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 VOUT [V] (15) FB voltage (VFB) vs. Output voltage (VOUT) 0.63 0.8 0.62 0.7 0.61 VFB [V] VSL [V] (14) Low level input voltage (VSL) vs. Operating input voltage (VIN) 0.9 0.6 0.5 0.60 0.59 0.4 0.58 0.3 0.57 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 VIN [V] 30 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 VIN [V] 1.5 Seiko Instruments Inc. 2.0 2.5 3.0 3.5 VOUT [V] 4.0 4.5 5.0 STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_00 S-8363 Series 2. Examples of Major Temperature Characteristics (Ta = -40 to +85C) (3) Current consumption during switching off (IIN2) vs. Temperature (Ta) 10.0 9.0 8.0 7.0 6.0 5.0 VIN = 0.9 V 4.0 VIN = 1.8 V 3.0 VIN = 4.2 V 2.0 VIN = 4.5 V 1.0 0.0 0 25 50 75 85 -40 -25 Ta [C] (4) Current consumption during switching off (ISS2) vs. Temperature (Ta) 200 180 160 140 120 100 VOUT = 1.8 V 80 60 VOUT = 3.3 V 40 VOUT = 5.0 V 20 0 0 25 50 75 85 -40 -25 Ta [C] ISS2 [A] IIN2 [A] ISS1 [A] (2) Current consumption during operation (ISS1) vs. Temperature (Ta) 1000 900 800 VOUT = 5.0 V 700 600 VOUT = 3.3 V 500 400 VOUT = 1.8 V 300 200 100 0 0 25 50 75 85 -40 -25 Ta [C] IIN1 [A] (1) Current consumption during operation (IIN1) vs. Temperature (Ta) 10.0 9.0 8.0 7.0 6.0 5.0 VIN = 0.9 V 4.0 VIN = 1.8 V 3.0 VIN = 4.2 V 2.0 VIN = 4.5 V 1.0 0.0 0 25 50 75 85 -40 -25 Ta [C] ISSS [A] (5) Current consumption during power-off (ISSS) vs. Temperature (Ta) 1.0 0.9 0.8 0.7 0.6 VIN = VOUT = 4.5 V 0.5 0.4 0.3 0.2 0.1 0.0 0 25 50 75 85 -40 -25 Ta [C] (7) Start-up oscillation frequency (fST) vs. Temperature (Ta) 500 450 400 350 VIN = 0.9 V 300 250 200 150 100 0 25 50 75 85 -40 -25 Ta [C] fST [kHz] fosc [MHz] (6) Oscillation frequency (fOSC) vs. Temperature (Ta) 1.38 1.34 1.30 1.26 1.22 1.18 1.14 VOUT = 1.8 V VOUT = 3.3 V 1.10 1.06 VOUT = 5.0 V 1.02 0 25 50 75 85 -40 -25 Ta [C] Seiko Instruments Inc. 31 STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_00 S-8363 Series 95 85 VOUT = 1.8 V VOUT = 3.3 V VOUT = 5.0 V 80 75 -40 -25 0 25 Ta [C] 50 75 85 25 20 VOUT = 5.0 V, VIN = 3.0 V 15 10 VOUT = 1.8 V, VIN = 1.2 V VOUT = 3.32 V, VIN = 1.8 V 5 0 -40 -25 25 Ta [C] 50 ILIM [mA] 1400 1200 1000 800 VOUT = 3.32 V, VIN = 1.8 V VOUT = 1.8 V, VIN = 1.2 V 600 -40 -25 0 25 Ta [C] 50 75 85 ILSW [A] (14) Power MOS FET leakage current (ILSW) vs. Temperature (Ta) 0.5 VOUT = 1.8 V 0.4 0.3 VOUT = 3.3 V 0.2 VOUT = 5.0 V 0.1 0.0 -0.1 -0.2 -0.3 -0.4 -0.5 0 25 50 75 85 -40 -25 Ta [C] 32 15 10 5 75 85 VOUT = 5.0 V, VIN = 3.0 V VOUT = 5.0 V, VIN = 3.0 V VOUT = 3.32 V, VIN = 1.8 V VOUT = 1.8 V, VIN = 1.2 V 20 0 0 (12) Limited current (ILIM) vs. Temperature (Ta) 1600 400 (11) Output current at PWM / PFM switching (IPFM) vs. Temperature (Ta) 30 IPFM [mA] PFMDuty [%] (10) PWM / PFM switching duty ratio (PFMDuty) vs. Temperature (Ta) 25 -40 -25 0 25 Ta [C] 50 (13) Maximum load current (IOUTMAX) vs. Temperature (Ta) 1000 900 800 VOUT = 5.0 V, VIN = 3.0 V 700 VOUT = 3.32 V, VIN = 1.8 V 600 500 400 300 200 VOUT = 1.8 V, VIN = 1.2 V 100 0 0 25 50 -40 -25 Ta [C] 75 85 IOUTMAX [mA] 70 tSS [ms] 90 (9) Soft-start time (tSS) vs. Temperature (Ta) 1.6 1.5 1.4 1.3 1.2 1.1 VOUT = 1.8 V 1.0 0.9 VOUT = 3.3 V 0.8 VOUT = 5.0 V 0.7 0.6 0 25 50 75 85 -40 -25 Ta [C] 75 85 (15) High level input voltage (VSH) vs. Temperature (Ta) 0.60 VIN = 4.5 V 0.55 VIN = 4.2 V 0.50 VSH [V] MaxDuty [%] (8) Maximum duty ratio (MaxDuty) vs. Temperature (Ta) 100 0.45 VIN = 1.8 V VIN = 0.9 V 0.40 0.35 0.30 -40 -25 Seiko Instruments Inc. 0 25 Ta [C] 50 75 85 STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_00 S-8363 Series (17) FB voltage (VFB) vs. Temperature (Ta) 0.63 0.55 0.62 0.50 0.61 0.45 0.40 0.35 0.30 VFB [V] VSL [V] (16) Low level input voltage (VSL) vs Temperature (Ta) 0.60 VIN = 0.9 V VIN = 1.8 V VIN = 4.2 V VIN = 4.5 V -40 -25 0.57 0 25 Ta [C] 50 75 85 0.0 VSTU+ [V] VST [V] -40 -25 0 25 Ta [C] 50 75 85 1.5 0.8 0.2 VOUT = 3.3 V (19) Start-up mode release voltage (VSTU+) vs. Temperature (Ta) 1.6 1.0 0.4 0.59 0.58 (18) Operating start voltage (VST) vs. Temperature (Ta) 1.2 0.6 0.60 IOUT = 10 mA IOUT = 1 mA IOUT = 0.1 mA -40 -25 1.4 1.3 1.2 1.1 0 25 Ta [C] 50 75 85 -40 -25 Seiko Instruments Inc. 0 25 Ta [C] 50 75 85 33 STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_00 S-8363 Series 3. Output waveform VOUT = 3.3 VVIN = 1.98 V t [2 s / div] VOUT VCONT t [1 s / div] VCONT t [1 s / div] VOUT [V] VOUT 3.34 3.33 3.32 3.31 3.30 3.29 3.28 3.27 3.26 VCONT t [1 s / div] VOUT = 5.0 VVIN = 3.0 V VOUT VCONT t [2 s / div] VOUT [V] IOUT = 10 mA 12.0 10.0 8.0 6.0 4.0 2.0 0.0 -2.0 VCONT [V] VOUT [V] IOUT = 1 mA 5.04 5.02 5.00 4.98 4.96 4.94 4.92 4.90 5.04 5.02 5.00 4.98 4.96 4.94 4.92 4.90 34 VCONT t [1 s / div] VOUT [V] VOUT VOUT VCONT t [1 s / div] 12.0 10.0 8.0 6.0 4.0 2.0 0.0 -2.0 12.0 10.0 8.0 6.0 4.0 2.0 0.0 -2.0 IOUT = 300 mA 12.0 10.0 8.0 6.0 4.0 2.0 0.0 -2.0 VCONT [V] VOUT [V] IOUT = 100 mA 5.04 5.02 5.00 4.98 4.96 4.94 4.92 4.90 3.8 3.7 3.6 3.5 3.4 3.3 3.2 3.1 3.0 VOUT VCONT [V] (2) IOUT = 300 mA 3.8 3.7 3.6 3.5 3.4 3.3 3.2 3.1 3.0 VCONT [V] VOUT [V] IOUT = 100 mA 3.34 3.33 3.32 3.31 3.30 3.29 3.28 3.27 3.26 3.8 3.7 3.6 3.5 3.4 3.3 3.2 3.1 3.0 VCONT [V] VCONT 3.34 3.33 3.32 3.31 3.30 3.29 3.28 3.27 3.26 VCONT [V] VOUT VOUT [V] IOUT = 10 mA 3.8 3.7 3.6 3.5 3.4 3.3 3.2 3.1 3.0 VCONT [V] VOUT [V] IOUT = 1 mA 3.34 3.33 3.32 3.31 3.30 3.29 3.28 3.27 3.26 VCONT [V] (1) 5.04 5.02 5.00 4.98 4.96 4.94 4.92 4.90 Seiko Instruments Inc. VOUT VCONT t [1 s / div] STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_00 S-8363 Series 4. Examples of Transient Response Characteristics Unless otherwise specified, the used parts are those in Table 6 External Parts List. 4.1 At power-on (VOUT(S) = 3.3 V, VIN = 0 V 0.9 V, Ta = +25C) (1) IOUT = 1 mA 4.0 VIN, VOUT [V] VOUT 3.0 2.0 1.0 0 4.2 VIN -0.8 0.2 1.2 2.2 Time [s] 3.2 At power-on (VOUT(S) = 3.3 V, VIN = 0 V 2.0 V, Ta = +25C) (1) IOUT = 1 mA 4.0 (2) IOUT = 300 mA 4.0 VOUT VIN, VOUT [V] VIN, VOUT [V] VOUT 3.0 2.0 VIN 1.0 0 4.3 -0.8 3.0 2.0 1.0 0 0.2 1.2 2.2 Time [s] VIN 3.2 -0.8 0.2 1.2 2.2 Time [s] 3.2 Power-off pin response (VOUT = 3.3 V, VIN = 0.9 V, VON/OFF = 0 V 0.9 V, Ta = +25C) VON/OFF, VOUT [V] (1) IOUT = 1 mA 4.0 VOUT 3.0 2.0 1.0 VON/OFF 0 4.4 -0.8 0.2 1.2 2.2 Time [s] 3.2 Power-off pin response (VOUT = 3.3 V, VIN = 2.0 V, VON/OFF = 0 V 2.0 V, Ta = +25C) (2) VOUT VON/OFF, VOUT [V] VON/OFF, VOUT [V] (1) IOUT = 1 mA 4.0 3.0 2.0 VON/OFF 1.0 0 -0.8 IOUT = 300 mA 4.0 VOUT 3.0 2.0 VON/OFF 1.0 0 0.2 1.2 2.2 Time [s] 3.2 -0.8 Seiko Instruments Inc. 0.2 1.2 2.2 Time [s] 3.2 35 STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_00 S-8363 Series Power supply voltage fluctuations (VOUT = 3.0 V, IOUT = 100 mA, Ta = +25C) 3.0 -100 100 200 Time [s] 300 1.0 3.0 -100 2.0 1.0 0 100 200 Time [s] 300 400 (2) IOUT = 100 mA0.1 mA 3.5 500 400 3.4 400 300 3.3 200 3.2 IOUT 3.1 -200 -100 0 100 200 Time [s] 300 VOUT 300 3.3 200 3.2 100 3.1 0 3.0 400 IOUT IOUT [mA] 500 VOUT [V] 100 0 -2 0 2 Time [s] 4 6 Load fluctuations (VOUT = 3.3 V, VIN = 1.98 V, IOUT = 100 mA 200 mA 100 mA, Ta = +25C) (1) IOUT = 100 mA200 mA 3.5 3.4 (2) VOUT 500 IOUT = 200 mA100 mA 3.5 400 3.4 300 3.3 200 3.2 IOUT 3.1 -100 0 100 200 Time [s] 300 400 500 400 VOUT 300 3.3 200 3.2 100 3.1 0 3.0 IOUT -100 Seiko Instruments Inc. 100 0 0 100 200 Time [s] 300 400 IOUT [mA] VOUT [V] 3.1 VOUT 3.0 3.0 VIN Load fluctuations (VOUT = 3.3 V, VIN = 1.98 V, IOUT = 0.1 mA 100 mA 0.1 mA, Ta = +25C) 3.4 4.7 4.0 3.2 400 (1) IOUT = 0.1 mA100 mA 3.5 3.0 5.0 VOUT 3.3 2.0 VOUT [V] 4.6 0 6.0 VIN [V] VIN 3.2 3.0 VOUT [V] 3.4 4.0 3.3 3.1 36 5.0 VOUT [V] VOUT VIN = 2.64 V1.98 V 3.5 VIN [V] (2) IOUT [mA] VOUT [V] 3.4 6.0 IOUT [mA] 4.5 (1) VIN = 1.98 V2.64 V 3.5 STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_00 S-8363 Series Reference Data Reference data is provided to determine specific external components. Therefore, the following data shows the characteristics of the recommended external components selected for various applications. 1. External parts Table 15 Efficiency vs. Output Current Characteristics and Output Voltage vs. Output Current Characteristics for External Parts (1 / 2) Condition 1 2 3 4 5 6 7 Product Name S-8363B S-8363B S-8363B S-8363B S-8363B S-8363B S-8363B Output Voltage 1.8 V 3.3 V 5.0 V 3.3 V 3.3 V 3.3 V 3.3 V L Product Name VLF302510 VLF302510 VLF302510 VLF302510 VLF302510 VLF302510 VLF302510 SD Product Name CRS08 CRS08 CRS08 CRS08 CRS08 RB070M-30TR RB051LA-40TR CIN C1608X7R1C105K EMK107B7105KA EMK107B7105KA C1608X7R1C105K C1608X7R1C105K EMK107B7105KA EMK107B7105KA Table 15 Efficiency vs. Output Current Characteristics and Output Voltage vs. Output Current Characteristics for External Parts (2 / 2) Condition COUT1 COUT2 COUT3 RFB1 RFB2 CFB 1 C1608X5R0J106M C1608X5R0J106M 30 k 15 k 82 pF 2 LMK212BJ106KD 0.1 F 68 k 15 k 47 pF 3 LMK212BJ106KD 0.1 F 110 k 15 k 38 pF 4 C1608X5R0J106M C1608X5R0J106M 68 k 15 k 47 pF 5 C1608X5R0J106M C1608X5R0J106M C1608X5R0J106M 68 k 15 k 47 pF 6 LMK212BJ106KD 0.1 F 68 k 15 k 47 pF 7 LMK212BJ106KD 0.1 F 68 k 15 k 47 pF Seiko Instruments Inc. 37 STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_00 S-8363 Series The properties of the external parts are shown below. Table 16 Part Inductor Part Name VLF302510 CRS08 RB070M-30TR Diode RB051LA-40TR RB161M-20TR RB161SS-20T2R LMK212BJ106KD EMK107B7105KA Capacitor C1608X5R0J106M C1608X7R1C105K * 1. DCR : * 2. IMAX : * 3. VF : * 4. IF : * 5. VR : * 6. EDC : Characteristics of External Parts Manfuacturer Characteristics 2.2 H, DCR*1 = 0.084 , IMAX*2 = 1.23 A, TDK Corporation L x WxH = 3.0 x 2.5 x 1.0 mm VF*3 = 0.32 V typ., IF*4 = 1.5 A, VR*5 = 30 V, TOSHIBA CORPORATION L x W x H = 3.5 x 1.6 x 1.08 mm VF*3 = 0.44 V typ., IF*4 = 1.5 A, VR*5 = 30 V, L x W x H = 3.5 x 1.6 x 0.9 mm VF*3 = 0.35 V max., IF*4 = 3.0 A, VR*5 = 20 V, L x W x H = 4.7 x 2.6 x 1.05 mm ROHM Co., Ltd. VF*3 = 0.31 V typ., IF*4 = 1.0 A, VR*5 = 20 V, L x W x H = 3.5 x 1.6 x 0.9 mm VF*3 = 0.42 V, IF*4 = 1.0 A, VR*5 = 20 V, L x W x H = 1.6 x 0.8 x 0.603 mm 10 F, EDC*6 = 10 V, X5R, L x W x H = 2.0 x 1.25 x 0.95 mm TAIYO YUDEN Co., Ltd. *6 10 F, EDC = 16 V, X7R, L x W x H = 1.6 x 0.8 x 0.9 mm 10 F, EDC*6 = 6.3 V, X5R, L x W x H = 1.6 x 0.8 x 0.9 mm TDK Corporation *6 1 F, EDC = 16 V, X7R, L x W x H = 1.6 x 0.8 x 0.9 mm DC resistance Maximum allowable current Forward voltage Forward current Reverse voltage Rated voltage Caution The values shown in the characteristics column of Table 16 above are based on the materials provided by each manufacture. However, consider the characteristics of the original materials when using the above products. 38 Seiko Instruments Inc. STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_00 S-8363 Series 2. Output Current (IOUT) vs. Efficiency () Characteristics, Output Current (IOUT) vs. Output Voltage (VOUT) Characteristics Following shows the actual output current (IOUT) vs. efficiency () and output current (IOUT) vs. output voltage (VOUT) characteristics for conditions 1 to 7 in Table 15. 100 90 80 70 60 50 40 30 20 10 0 VIN = 0.9 V VIN = 1.2 V VIN = 1.5 V 0.01 100 90 80 70 60 50 40 30 20 10 0 100 VOUT [V] VIN = 0.9 V VIN = 1.2 V VIN = 1.8 V 100 90 80 70 60 50 40 30 20 10 0 0.1 1 10 IOUT [mA] 100 0.1 3.40 3.38 3.36 3.34 3.32 3.30 3.28 3.26 3.24 3.22 3.20 1 10 IOUT [mA] 100 1000 VIN = 3.0 V VIN = 2.5 V VIN = 0.9 V VIN = 1.2 V VIN = 1.8 V 0.01 1000 0.1 1 10 IOUT [mA] 100 1000 S-8363B (VOUT(S) = 5.0 V) VIN = 4.2 V VIN = 4.5 V VIN = 1.8 V VIN = 2.4 V VIN = 3.0 V 0.01 Condition 4 VIN = 0.9 V VIN = 1.2 V VIN = 1.5 V 0.01 1000 VIN = 2.5 V VIN = 3.0 V Condition 3 [%] 1 10 IOUT [mA] 1.90 1.88 1.86 1.84 1.82 1.80 1.78 1.76 1.74 1.72 1.70 S-8363B (VOUT(S) = 3.3 V) 0.01 [%] 0.1 VOUT [V] [%] Condition 2 100 90 80 70 60 50 40 30 20 10 0 VOUT [V] S-8363B (VOUT(S) = 1.8 V) 0.1 1 10 IOUT [mA] 100 5.10 5.08 5.06 5.04 5.02 5.00 4.98 4.96 4.94 4.92 4.90 VIN = 4.2 V VIN = 4.5 V VIN = 1.8 V VIN = 2.4 V VIN = 3.0 V 0.01 1000 0.1 1 10 IOUT [mA] 100 1000 S-8363B (VOUT(S) = 3.3 V) VIN = 2.5 V VIN = 3.0 V VOUT [V] [%] Condition 1 VIN = 0.9 V VIN = 1.2 V VIN = 1.8 V 0.01 0.1 1 10 IOUT [mA] 100 3.40 3.38 3.36 3.34 3.32 3.30 3.28 3.26 3.24 3.22 3.20 1000 Seiko Instruments Inc. VIN = 3.0 V VIN = 2.5 V VIN = 0.9 V VIN = 1.2 V VIN = 1.8 V 0.01 0.1 1 10 IOUT [mA] 100 1000 39 STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_00 S-8363 Series 100 90 80 70 60 50 40 30 20 10 0 S-8363B (VOUT(S) = 3.3 V) VIN = 0.9 V VIN = 1.2 V VIN = 1.8 V 0.01 100 90 80 70 60 50 40 30 20 10 0 100 VIN = 3.0 V VIN = 2.5 V VIN = 0.9 V VIN = 1.2 V VIN = 1.8 V 0.01 1000 VIN = 2.5 V VIN = 3.0 V VIN = 0.9 V VIN = 1.2 V VIN = 1.8 V Condition 7 [%] 1 10 IOUT [mA] 3.40 3.38 3.36 3.34 3.32 3.30 3.28 3.26 3.24 3.22 3.20 0.1 1 10 IOUT [mA] 100 1000 S-8363B (VOUT(S) = 3.3 V) 0.01 0.1 1 10 IOUT [mA] 100 3.40 3.38 3.36 3.34 3.32 3.30 3.28 3.26 3.24 3.22 3.20 VIN = 3.0 V VIN = 2.5 V VIN = 0.9 V VIN = 1.2 V VIN = 1.8 V 0.01 1000 0.1 1 10 IOUT [mA] 100 1000 S-8363B (VOUT(S) = 3.3 V) VIN = 2.5 V VIN = 3.0 V VIN = 0.9 V VIN = 1.2 V VIN = 1.8 V 0.01 40 0.1 VOUT [V] [%] Condition 6 100 90 80 70 60 50 40 30 20 10 0 VOUT [V] VIN = 2.5 V VIN = 3.0 V VOUT [V] [%] Condition 5 0.1 1 10 IOUT [mA] 100 3.40 3.38 3.36 3.34 3.32 3.30 3.28 3.26 3.24 3.22 3.20 1000 Seiko Instruments Inc. VIN = 3.0 V VIN = 2.5 V VIN = 0.9 V VIN = 1.2 V VIN = 1.8 V 0.01 0.1 1 10 IOUT [mA] 100 1000 STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_00 S-8363 Series 3. Output Current (IOUT) vs. Ripple Voltage (Vr) Characteristics Following shows the actual output current (IOUT) vs. ripple voltage (Vr) characteristics for conditions of 1 to 7 in Table 15. VIN = 1.5 V VIN = 1.2 V VIN = 0.9 V 0.01 VIN = 4.5 V VIN = 4.2 V Vr [mV] Condition 5 50 45 40 35 30 25 20 15 10 5 0 1 10 IOUT [mA] 100 0.1 100 0.01 Condition 7 50 45 40 35 30 25 20 15 10 5 0 0.1 VIN = 3.0 V VIN = 2.5 V 0.01 100 1000 100 1000 50 45 40 35 30 25 20 15 10 5 0 1 10 IOUT [mA] 100 1000 0.1 100 1000 100 1000 VIN = 1.8 V VIN = 1.2 V VIN = 0.9 V 1 10 IOUT [mA] S-8363B (VOUT(S) = 3.3 V) VIN = 3.0 V VIN = 2.5 V 0.01 0.1 VIN = 1.8 V VIN = 1.2 V VIN = 0.9 V 1 10 IOUT [mA] S-8363B (VOUT(S) = 3.3 V) VIN = 3.0 V VIN = 2.5 V 0.01 50 45 40 35 30 25 20 15 10 5 0 0.1 VIN = 0.9 V VIN = 1.2 V S-8363B (VOUT(S) = 3.3 V) Condition 6 VIN = 1.8 V VIN = 1.2 V VIN = 0.9 V 1 10 IOUT [mA] VIN = 1.8 V VIN = 2.5 V VIN = 3.0 V 0.01 1000 S-8363B (VOUT(S) = 3.3 V) VIN = 3.0 V VIN = 2.5 V S-8363B (VOUT(S) = 3.3 V) Condition 4 VIN = 3.0 V VIN = 2.4 V VIN = 1.8 V 1 10 IOUT [mA] 50 45 40 35 30 25 20 15 10 5 0 1000 S-8363B (VOUT(S) = 5.0 V) 0.01 Vr [mV] 0.1 Vr [mV] Vr [mV] Condition 3 50 45 40 35 30 25 20 15 10 5 0 Condition 2 Vr [mV] Vr [mV] 50 45 40 35 30 25 20 15 10 5 0 Vr [mV] S-8363B (VOUT(S) = 1.8 V) Condition 1 0.1 VIN = 1.8 V VIN = 1.2 V VIN = 0.9 V 1 10 IOUT [mA] Seiko Instruments Inc. 41 STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR Rev.2.0_00 S-8363 Series Marking Specification (1) SNT-6A SNT-6A Top view 1 (1) to (3) : (4) to (6) : 6 3 (1) (2) (3) (4) (5) (6) 2 Product code (Refer to Product name vs. Product code) Lot number 5 4 Product name vs. Product code Product name (1) I S-8363B-I6T1U2 Product code (2) (3) 9 B (2) SOT-23-6 SOT-23-6 Top view 6 5 4 (1) to (3) : (4) : Product code (Refer to Product name vs. Product code) Lot number (1) (2) (3) (4) 1 2 3 Product name vs. Product code Product name S-8363B-M6T1U2 (1) I Product code (2) (3) 9 B Remark Please select products of environmental code = U for Sn 100%, halogen-free products. 42 Seiko Instruments Inc. 1.570.03 6 1 5 4 2 3 +0.05 0.08 -0.02 0.5 0.480.02 0.20.05 No. PG006-A-P-SD-2.0 TITLE SNT-6A-A-PKG Dimensions No. PG006-A-P-SD-2.0 SCALE UNIT mm Seiko Instruments Inc. +0.1 o1.5 -0 4.00.1 2.00.05 0.250.05 +0.1 1.850.05 5 o0.5 -0 4.00.1 0.650.05 3 2 1 4 5 6 Feed direction No. PG006-A-C-SD-1.0 TITLE SNT-6A-A-Carrier Tape PG006-A-C-SD-1.0 No. SCALE UNIT mm Seiko Instruments Inc. 12.5max. 9.00.3 Enlarged drawing in the central part o130.2 (60) (60) No. PG006-A-R-SD-1.0 TITLE SNT-6A-A-Reel No. PG006-A-R-SD-1.0 SCALE UNIT QTY. mm Seiko Instruments Inc. 5,000 0.52 1.36 0.52 0.3 0.2 0.3 0.2 0.3 Caution Making the wire pattern under the package is possible. However, note that the package may be upraised due to the thickness made by the silk screen printing and of a solder resist on the pattern because this package does not have the standoff. No. PG006-A-L-SD-3.0 TITLE SNT-6A-A-Land Recommendation PG006-A-L-SD-3.0 No. SCALE UNIT mm Seiko Instruments Inc. 2.90.2 1.90.2 6 0.95 5 1 4 2 3 +0.1 0.15 -0.05 0.95 0.350.15 No. MP006-A-P-SD-1.1 TITLE SOT236-A-PKG Dimensions No. MP006-A-P-SD-1.1 SCALE UNIT mm Seiko Instruments Inc. 4.00.1(10 pitches:40.00.2) +0.1 o1.5 -0 2.00.05 +0.2 o1.0 -0 0.250.1 4.00.1 1.40.2 3.20.2 3 2 1 4 5 6 Feed direction No. MP006-A-C-SD-3.1 TITLE SOT236-A-Carrier Tape No. MP006-A-C-SD-3.1 SCALE UNIT mm Seiko Instruments Inc. 12.5max. 9.00.3 Enlarged drawing in the central part o130.2 (60) (60) No. MP006-A-R-SD-2.1 SOT236-A-Reel TITLE MP006-A-R-SD-2.1 No. SCALE UNIT QTY mm Seiko Instruments Inc. 3,000 www.sii-ic.com * * * * * * The information described herein is subject to change without notice. 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