SGLS304A - JUNE 2005 - REVISED JUNE 2008 D D D D D D D D D D Qualified for Automotive Applications Complete PWM Power Control Circuitry Completely Synchronized Operation Internal Undervoltage Lockout Protection Wide Supply Voltage Range Internal Short-Circuit Protection Oscillator Frequency . . . 500 kHz Max Variable Dead Time Provides Control Over Total Range Internal Regulator Provides a Stable 2.5-V Reference Supply Available in Q-Temp Automotive HighRel Automotive Applications Configuration Control / Print Support Qualification to Automotive Standards PW PACKAGE (TOP VIEW) CT RT ERROR 1IN + AMPLIFIER 1 1IN - 1FEEDBACK 1DTC 1OUT GND 1 16 2 15 3 14 4 13 5 12 6 11 7 10 8 9 REF SCP 2IN + ERROR 2IN - AMPLIFIER 2 2FEEDBACK 2DTC 2OUT VCC description The TL1451A incorporates on a single monolithic chip all the functions required in the construction of two pulse-width-modulation (PWM) control circuits. Designed primarily for power-supply control, the TL1451A contains an on-chip 2.5-V regulator, two error amplifiers, an adjustable oscillator, two dead-time comparators, undervoltage lockout circuitry, and dual common-emitter output transistor circuits. The uncommitted output transistors provide common-emitter output capability for each controller. The internal amplifiers exhibit a common-mode voltage range from 1.04 V to 1.45 V. The dead-time control (DTC) comparator has no offset unless externally altered and can provide 0% to 100% dead time. The on-chip oscillator can be operated by terminating RT and CT. During low VCC conditions, the undervoltage lockout control circuit feature locks the outputs off until the internal circuitry is operational. The TL1451A is characterized for operation from - 40C to 125C. AVAILABLE OPTIONS{ PACKAGED DEVICES} TA TSSOP (PW) -40C to 125C TL1451AQPWRQ1 For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI web site at http://www.ti.com. Package drawings, thermal data, and symbolization are available at http://www.ti.com/packaging. The PW package is only available left-end taped and reeled. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. ! "#$ ! %#&'" ($) (#"! " !%$""! %$ *$ $! $+! !#$! !(( ,-) (#" %"$!!. ($! $"$!!'- "'#($ $!. '' %$$!) Copyright 2008, Texas Instruments Incorporated %(#"! "%' /0102 '' %$$! $ $!$( #'$!! *$,!$ $() '' *$ %(#"!2 %(#" %"$!!. ($! $"$!!'- "'#($ $!. '' %$$!) www.ti.com 1 SGLS304A - JUNE 2005 - REVISED JUNE 2008 functional block diagram 2 DTC ERROR AMPLIFIER 2 IN + IN - 2 FEEDBACK 1 FEEDBACK SCP VCC RT 9 2 11 14 13 10 + 12 Oscillator 1/2 Vref 5 15 IN - 4 16 REF UVLO S 3 PWM COMP Reference Voltage 12 k R IN + 2 OUTPUT - 170 k ERROR AMPLIFIER 1 CT 1 R + 7 - 1 OUTPUT PWM COMP 1 DTC 6 8 COMPONENT COUNT 65 Resistors Capacitors 8 Transistors 105 JFETs 2 18 www.ti.com GND SGLS304A - JUNE 2005 - REVISED JUNE 2008 absolute maximum ratings over operating free-air temperature range Supply voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 V Amplifier input voltage, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 V Collector output voltage, VO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 V Collector output current, IO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 mA Continuous power total dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Dissipation Rating Table Operating free-air temperature range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40C to 125C Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -65C to 150C Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260C Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. DISSIPATION RATING TABLE PACKAGE TA 25C POWER RATING DERATING FACTOR ABOVE TA = 25C TA = 70C POWER RATING TA = 85C POWER RATING TA = 125C POWER RATING PW 838 mW 6.7 mW/C 536 mW 436 mW 168 mW recommended operating conditions MIN Supply voltage, VCC Amplifier input voltage, VI MAX UNIT 3.6 50 V 1.05 1.45 V Collector output voltage, VO 50 V Collector output current, IO 20 mA Current into feedback terminal 45 A Feedback resistor, RF 100 Timing capacitor, CT 150 15000 Timing resistor, RT 5.1 100 k 1 500 kHz -40 125 C Oscillator frequency Operating free-air temperature, TA www.ti.com k pF 3 SGLS304A - JUNE 2005 - REVISED JUNE 2008 electrical characteristics over recommended operating free-air temperature range, VCC = 6 V, f = 200 kHz (unless otherwise noted) reference section TL1451AQ PARAMETER Output voltage (pin 16) TEST CONDITIONS TA = 25C TA = MIN and 125C IO = 1 mA TYP MIN 2.4 2.5 2.6 2.35 2.46 -0.63% 2.65 4%} TA = 25C TA = 125C 2.0 12.5 0.7 15 TA = MIN TA = 25C 0.3 30 1 7.5 TA = 125C TA = MIN 0.3 14 0.3 20 10 30 Output voltage change with temperature Input voltage regulation Output voltage regulation VCC = 3.6 V to 40 V IO = 0.1 mA to 1 mA MAX Short-circuit output current VO = 0 All typical values are at TA = 25C unless otherwise indicated. These parameters are not production tested. 3 UNIT V mV mV mA undervoltage lockout section TL1451AQ PARAMETER TEST CONDITIONS Upper threshold voltage (VCC) Lower threshold voltage (VCC) Hysteresis (VCC) Reset threshold voltage (VCC) 4 www.ti.com TYP TA = 25C TA = 125C 2.72 TA = MIN TA = 25C 3.15 TA = 125C TA = MIN 1.65 1.7 MAX UNIT V 2.6 V 3.09 TA = 25C TA = 125C 80 120 10 50 TA = MIN TA = 25C 10 60 1.5 TA = 125C 0.95 TA = MIN All typical values are at TA = 25C unless otherwise indicated. MIN 1.5 mV V SGLS304A - JUNE 2005 - REVISED JUNE 2008 short-circuit protection control section PARAMETER Input threshold voltage (SCP) TEST CONDITIONS TA = 25C TA = 125C 650 700 750 400 478 650 TA = MIN 800 880 950 140 185 230 TA = 25C TA = 125C 60 120 70 120 TA = MIN 60 120 Standby voltage (SCP) Latched input voltage (SCP) TL1451AQ MIN TYP MAX Equivalent timing resistance Comparator threshold voltage (FEEDBACK) All typical values are at TA = 25C unless otherwise indicated. UNIT mV mV mV 170 k 1.18 V oscillator section PARAMETER TEST CONDITIONS CT = 330 pF, RT = 10 k Frequency MIN TL1451AQ TYP TA = 25C TA = 125C 200 193 MAX 195 Standard deviation of frequency CT = 330 pF, TA = MIN RT = 10 k VCC = 3.6 V to 40 V TA = 25C TA = 125C 1% Frequency change with voltage TA = MIN 3% UNIT kHz 2% 1% Frequency change with temperature All typical values are at TA = 25C unless otherwise indicated. These parameters are not production tested. 1.37% 10%} dead-time control section PARAMETER TEST CONDITIONS TL1451AQ TYP MAX MIN TA = 25C TA = MIN and 125C Input bias current (DTC) 1 3 A 2.22 2.32 V TA = MIN Zero duty cycle 2.28 2.4 Maximum duty cycle 1.2} -80 TA = 25C TA = 125C Input threshold voltage at f = 10 kHz (DTC) A A -145 Latch mode (source) current (DTC) Latched input voltage (DTC) UNIT 2.3 2.05 1.45 2.25} V All typical values are at TA = 25C unless otherwise indicated. These parameters are not production tested. www.ti.com 5 SGLS304A - JUNE 2005 - REVISED JUNE 2008 error-amplifier section PARAMETER Input offset voltage TEST CONDITIONS VO (FEEDBACK) = 1.25 V TL1451AQ MIN TYP VO (FEEDBACK) = 1.25 V Input bias current VO (FEEDBACK) = 1.25 V Common-mode input voltage range 10 Open-loop voltage amplification 100 100 TA = 25C TA = 125C 160 500 100 500 TA = MIN 142 700 TA = 25C TA = 125C 70 80 70 80 TA = MIN 64 80 Common-mode rejection ratio 60 Positive output voltage swing 2 dB 1.5 MHz 80 dB V Negative output voltage swing 1 Output (source) current (FEEDBACK) VID = - 0.1 V, VO = 1.25 V VID = 0.1 V, VO = 1.25 V TA = 25C TA = 125C 0.5 1.6 0.4 1.8 TA = MIN TA = 25C 0.3 1.7 -45 -70 -25 -50 -15 -70 TA = 125C TA = MIN nA V Unity-gain bandwidth Output (sink) current (FEEDBACK) nA 200 1.05 to 1.45 RF = 200 k mV 12 TA = 125C TA = MIN VCC = 3.6 V to 40 V UNIT 7 TA = 25C TA = 125C TA = MIN TA = 25C Input offset current MAX V mA A All typical values are at TA = 25C unless otherwise indicated. output section PARAMETER Collector off-state current TEST CONDITIONS TL1451AQ TYP MAX MIN VO = 50 V TA = 25C 10 TA = 125C TA = MIN Output saturation voltage Short-circuit output current All typical values are at TA = 25C unless otherwise indicated. VO = 6 V 1.2 2 1.6 2.4 1.36 2.2 90 UNIT A V mA pwm comparator section PARAMETER Input threshold voltage at f = 10 kHz (FEEDBACK) All typical values are at TA = 25C unless otherwise indicated. These parameters are not production tested. 6 Zero duty cycle TL1451AQ MIN TYP MAX 2.05 2.25} Maximum duty cycle 1.2} TEST CONDITIONS www.ti.com 1.45 UNIT V SGLS304A - JUNE 2005 - REVISED JUNE 2008 total device PARAMETER TL1451AQ MIN TYP MAX UNIT Off-state 1.3 1.8 mA RT = 10 k 1.7 2.4 mA TEST CONDITIONS Standby supply current Average supply current All typical values are at TA = 25C unless otherwise indicated. PARAMETER MEASUREMENT INFORMATION Test Input S1 VCC = 5 V RL CPE 0.47 F 4.7 k OUT1 RL 4.7 k 16 15 14 13 12 11 10 OUT2 9 TL1451A 1 CT 330 pF 2 3 4 5 6 7 8 RT 10 k Test Input Figure 1. Test Circuit Oscillator Triangle Waveform Error Amplifier Output Dead-Time Input Voltage Short-Circuit Protection Comparator Input Voltage PWM Comparator Output Voltage 2.0 V 1.6 V 1.4 V 1.25 V H L Dead Time 100% H Output Transistor Collector Waveform L 0.6 V Protection Enable Terminal Waveform tpe H Short-Circuit Protection Comparator Output Power Supply Voltage 0V L 3.6 V 2.8 V TYP 0V Protection Enable Time, tpe = (0.051 x 106 x Cpe) in seconds Figure 2. TL1451A Timing Diagram www.ti.com 7 SGLS304A - JUNE 2005 - REVISED JUNE 2008 TYPICAL CHARACTERISTICS TRIANGLE OSCILLATOR FREQUENCY vs TIMING RESISTANCE OSCILLATOR FREQUENCY VARIATION vs FREE-AIR TEMPERATURE 3 VCC = 5 V TA = 25C f osc - Oscillator Frequency Variation - % afosc ffosc osc - Triangle Oscillator Frequency - Hz 1M CT = 150 pF 100 k CT = 1500 pF 10 k CT = 15000 pF 1k 1k 4k 10 k 40 k 100 k 400 k VCC = 3.6 V RT = 10 k CT = 330 pF fosc = 200 kHz 2 1 0 -1 -2 IIIIIIIIIIII IIIIIIIIIIII IIIIIIIIIIII IIIIIIIIIIII IIIIIIIIIIII IIIII -3 -25 1M RT - Timing Resistance - 75 0 25 50 TA - Free-Air Temperature - C Figure 3 Figure 4 TRIANGLE WAVEFORM PERIOD vs TIMING CAPACITANCE TRIANGLE WAVEFORM SWING VOLTAGE vs TIMING CAPACITANCE 102 VCC = 5 V RT = 5.1 k TA = 25C s Triangle Waveform Period - uS Triangle Waveform Swing Voltage - V 2.6 2.4 100 2.2 2 1.8 1.6 1.4 1.2 VCC = 5 V RT = 5.1 k TA = 25C 101 100 1 0.8 101 102 103 104 CT - Timing Capacitance - pF 105 Figure 5 8 10-1 101 102 103 104 CT - Timing Capacitance - pF Figure 6 www.ti.com 105 SGLS304A - JUNE 2005 - REVISED JUNE 2008 TYPICAL CHARACTERISTICS REFERENCE OUTPUT VOLTAGE VARIATION vs FREE-AIR TEMPERATURE 30 avref - Reference Output Voltage Variation - mV VO(ref) avref - Reference Output Voltage Variation - mV VO(ref) REFERENCE OUTPUT VOLTAGE VARIATION vs FREE-AIR TEMPERATURE VCC = 3.6 V II(ref) = 1 mA 20 10 0 -10 AA AA AA AA - 20 IIIII IIIIIIIIIIII IIIIIIIIIIII IIIIIIIIIIII IIIIIIIIIIII IIIIIII - 30 - 25 75 0 25 50 TA - Free-Air Temperature - C 100 30 VCC = 40 V II(ref) = 1 mA 20 IIIII IIIIIIIIIII IIIIIIIIIII IIIIIIIIIII IIIIIIIIIII IIIIII 10 0 -10 AA AA AA AA - 20 - 30 - 25 75 0 25 50 TA - Free-Air Temperature - C Figure 7 Figure 8 DROPOUT VOLTAGE VARIATION vs FREE-TEMPERATURE REFERENCE OUTPUT VOLTAGE vs SUPPLY VOLTAGE 1.1 II(ref) = 1 mA TA = 25C 2.5 1 Dropout Voltage Variation - V VO(ref) Vref - Reference Output Voltage - V 3 AA AA AA 100 2 1.5 1 0.9 0.8 0.7 0.6 0.5 0 0 5 10 15 20 25 30 VCC - Supply Voltage - V 35 40 Figure 9 - 25 0 25 50 75 TA - Free-Air Temperature - C 100 Figure 10 www.ti.com 9 SGLS304A - JUNE 2005 - REVISED JUNE 2008 TYPICAL CHARACTERISTICS UNDERVOLTAGE LOCKOUT HYSTERESIS CHARACTERISTICS - Output Collector Voltage - V VVCE CE Undervoltage Lockout Threshold Voltage - V TA = 25C TA = -20C TA = 85C AA AA AA UNDERVOLTAGE LOCKOUT CHARACTERISTIC 5 4 3 5V RL 2 7,10 I = IO 8 VDE 1 300 3.5 IO = 10 mA 3.25 Threshold Voltage -VTH (Left Scale) 3 200 Threshold Voltage -VTL (Left Scale) 2.75 150 2.5 100 Hysteresis Voltage (Right Scale) 50 2.25 0 2 0 0 1 2 4 3 5 -25 0 25 50 Figure 11 Figure 12 SHORT-CIRCUIT PROTECTION CHARACTERISTICS Comparator Threshold Voltage - V Short-Circuit Protection Latch Reset Supply Voltage (Right Scale) 2 1.20 1.15 1.10 - 25 2.5 Short-Circuit Protection Comparator Threshold Voltage (Left Scale) 50 75 0 25 TA - Free-Air Temperature - C Figure 13 www.ti.com 1.5 1 100 RS - Latch Reset Supply Voltage - V 3 1.30 1.25 75 TA - Free-Air Temperature - C VCC - Supply Voltage - V 10 250 100 Undervoltage Lockout Hystersis Voltage - mV 6 SGLS304A - JUNE 2005 - REVISED JUNE 2008 TYPICAL CHARACTERISTICS PROTECTION ENABLE TIME vs PROTECTION ENABLE CAPACITANCE 18 tpe t pe - Protection Enable Time - s 15 12 9 6 3 0 0 200 50 100 150 CPE - Protection Enable Capacitance - F SCP 15 Vref 16 170 k Short-circuit Protection Comparator 12 k CPE ERROR AMP 1 ERROR AMP 2 250 Vref S R Protection Latch Vref U.V.L.O. + 1.25 V - Figure 14 www.ti.com 11 SGLS304A - JUNE 2005 - REVISED JUNE 2008 TYPICAL CHARACTERISTICS OPEN-LOOP VOLTAGE AMPLIFICATION vs FREQUENCY ERROR AMP MAXIMUM OUTPUT VOLTAGE SWING vs FREQUENCY 2 90 VCC = 5 V TA = 25C Open-Loop Voltage Amplification - dB Error Amp Maximum Output Voltage Swing - V 2.25 1.75 1.5 1.25 1 0.75 0.5 0.25 0 1k 10 k 100 k 1M f - Frequency - Hz VCC = 5 V TA = 25C 80 70 60 50 40 30 20 10 0 100 10 M 1k Figure 15 Figure 16 GAIN (AMPLIFIER IN UNITY-GAIN CONFIGURATION) vs FREQUENCY 10 VCC = 5 V TA = 25C 5 G - Gain - dB 0 -5 -10 -15 -20 1k 10 k 100 k f - Frequency - Hz Figure 17 12 10 k 100 k f - Frequency - Hz www.ti.com 1M 10 M 1M 2M SGLS304A - JUNE 2005 - REVISED JUNE 2008 TYPICAL CHARACTERISTICS CLOSED-LOOP GAIN AND PHASE SHIFT vs FREQUENCY 70 Phase Shift (Right Scale) 50 40 47 pF 470 pF 4700 pF 0 Closed-Loop Gain (Left Scale) -10 -20 30 -30 Phase Shift Closed-Loop Gain - dB 60 CX: VCC = 5 V Rref = 150 Cref = 470 pF TA = 25C -40 20 -50 -60 -70 10 -80 0 100 1k 10 k 100 k -90 1M f - Frequency - Hz Vref + - 39 k Cx Rref Cref 39 k Test Circuit Figure 18 www.ti.com 13 SGLS304A - JUNE 2005 - REVISED JUNE 2008 TYPICAL CHARACTERISTICS CLOSED-LOOP GAIN AND PHASE SHIFT vs FREQUENCY 70 CX: Phase Shift (Right Scale) 50 Closed-Loop Gain (Left Scale) 40 47 pF 470 pF 4700 pF 0 -10 -20 30 -30 -40 20 -50 -60 -70 10 -80 0 100 1k 10 k 100 k f - Frequency - Hz Vref + - 39 k Cx Rref Cref 39 k Test Circuit Figure 19 14 www.ti.com -90 1M Phase Shift Closed-Loop Gain - dB 60 VCC = 5 V Rref = 15 Cref = 470 pF TA = 25C SGLS304A - JUNE 2005 - REVISED JUNE 2008 TYPICAL CHARACTERISTICS CLOSED-LOOP GAIN AND PHASE SHIFT vs FREQUENCY 70 CX: 50 40 Phase Shift (Right Scale) Closed-Loop Gain (Left Scale) 47 pF 470 pF 4700 pF 0 -10 -20 30 -30 Phase Shift Closed-Loop Gain - dB 60 VCC = 5 V Rref = 15 Cref = 470 pF TA = 25C -40 20 -50 -60 -70 10 -80 0 100 1k 10 k 100 k -90 1M f - Frequency - Hz Vref + - 39 k Cx Rref Cref 39 k Test Circuit Figure 20 www.ti.com 15 SGLS304A - JUNE 2005 - REVISED JUNE 2008 TYPICAL CHARACTERISTICS CLOSED-LOOP GAIN AND PHASE SHIFT vs FREQUENCY 70 50 0 40 Closed-Loop Gain (Left Scale) Phase Shift (Right Scale) 30 -10 -20 -30 -40 20 -50 -60 -70 10 -80 0 100 1k 10 k 100 k f - Frequency - Hz Vref + - 39 k Cref 39 k Test Circuit Figure 21 16 www.ti.com -90 1M Phase Shift Closed-Loop Gain - dB 60 VCC = 5 V Cref = 470 pF TA = 25C SGLS304A - JUNE 2005 - REVISED JUNE 2008 TYPICAL CHARACTERISTICS OUTPUT SINK CURRENT vs COLLECTOR OUTPUT SATURATION VOLTAGE 120 TA = - 20C 110 TA = 25C Output Sink Current - mA 100 90 TA = 85C 80 70 60 50 40 30 20 VCC = 3.6 V 10 0 0 15 5 10 Collector Output Saturation Voltage - V 20 Figure 22 VO(ref) - 0.01 1 VO(ref) - 0.02 0.9 VO(ref) - 0.03 Maximum Output Voltage Swing (Right Scale) 0.8 VO(ref) - 0.04 VO(ref) - 0.05 0.7 Maximum Output Voltage Swing (Right Scale) 0.6 VO(ref) - 0.06 VO(ref) - 0.07 -25 0.5 Vref VOM - Maximum Output Voltage Swing - V VOM - Maximum Output Voltage Swing - V MAXIMUM OUTPUT VOLTAGE SWING vs FREE-AIR TEMPERATURE 33 k + 33 k - RL 100 k Vvom - 1 VCC = 3.6 V RL = 100 k VOM+1 = 1.25 V VOM -1 = 1.15 V (Right Scale) VOM -1 = 1.35 V (Left Scale) TEST CIRCUIT 0 25 50 75 TA - Free-Air Temperature - C 100 Figure 23 www.ti.com 17 SGLS304A - JUNE 2005 - REVISED JUNE 2008 TYPICAL CHARACTERISTICS OUTPUT TRANSISTOR ON DUTY CYCLE vs DEAD-TIME INPUT VOLTAGE STANDBY CURRENT vs SUPPLY VOLTAGE VCC = 3.6 V RT = 10k CT = 330 pF 10 20 IICC CC (Standby) - Standby Current - mA Output Transistor "On" Duty Cycle - % 0 30 40 50 60 70 AA AA 80 90 100 0 0.5 1 1.5 2 2.5 3 3.5 TA = 25C 2 1.75 1.5 1.25 1 0.75 0.5 0.25 0 4 0 10 20 30 VCC - Supply Voltage - V Dead-Time Input Voltage - V Figure 24 40 Figure 25 MAXIMUM CONTINUOUS POWER DISSIPATION vs FREE-AIR TEMPERATURE STANDBY CURRENT vs FREE-AIR TEMPERATURE I CC - Supply Current - mA ICC 2 AA AA 1.75 1.5 Maximum Continuous Power Dissipation - mW 1200 Average Supply Current VCC = 6 V, RT = 10 k, CT = 330 pF Stand-By Current, VCC = 40 V, No Load 1.25 1 Stand-By Current, VCC = 3.6 V, No Load 0.75 0.5 0.25 0 -25 0 25 50 75 TA - Free-Air Temperature - C 100 Figure 26 18 1100 16-Pin N Plastic Dip 1000 Thermal Resistance 125C/W 900 800 700 600 16-Pin NS Plastic SO 500 400 Thermal Resistance 250C/W 300 200 100 0 -25 0 25 50 75 TA - Free-Air Temperature Figure 27 www.ti.com 100 SGLS304A - JUNE 2005 - REVISED JUNE 2008 APPLICATION INFORMATION VCC 220 k 0.47 F 150 470 50 k 33 k L1 330 pF R1 R2 33 k R3 33 k 33 k Step-Up C2 Output R4 C1 500 pF Vref 16 15 14 13 12 11 10 9 TL1451A 1 2 3 4 5 6 7 8 470 470 R5 C5 220 500 pF 1 F L2 R6 470 33 k Step-Down C4 Output R7 33 k NOTE A: Values for R1 through R7, C1 through C4, and L1 and L2 depend upon individual application. Figure 28. High-Speed Dual Switching Regulator www.ti.com 19 PACKAGE OPTION ADDENDUM www.ti.com 20-Oct-2011 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Qty Eco Plan (2) Lead/ Ball Finish MSL Peak Temp TL1451AQPWRG4Q1 ACTIVE TSSOP PW 16 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM TL1451AQPWRQ1 ACTIVE TSSOP PW 16 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM (3) Samples (Requires Login) (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. 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OTHER QUALIFIED VERSIONS OF TL1451A-Q1 : * Catalog: TL1451A * Enhanced Product: TL1451A-EP Addendum-Page 1 PACKAGE OPTION ADDENDUM www.ti.com 20-Oct-2011 * Military: TL1451AM NOTE: Qualified Version Definitions: * Catalog - TI's standard catalog product * Enhanced Product - Supports Defense, Aerospace and Medical Applications * Military - QML certified for Military and Defense Applications Addendum-Page 2 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are sold subject to TI's terms and conditions of sale supplied at the time of order acknowledgment. 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