元器件交易网www.cecb2b.com TPS76715Q, TPS76718Q, TPS76725Q, TPS76727QTPS76728Q, TPS76730Q TPS76733Q, TPS76750Q, TPS76701QFAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORSSLVS208C – MAY 1999 – REVISED SEPTEMBER 1999D1 A Low-Dropout Voltage RegulatorDAvailable in 1.5-V, 1.8-V, 2.5-V, 2.7-V, 2.8-V,DDDDDD PWP PACKAGE(TOP VIEW)D3.0-V, 3.3-V, 5.0-V Fixed Output andAdjustable VersionsDropout Voltage Down to 230 mV at 1 A(TPS76750)Ultra Low 85 µA Typical Quiescent CurrentFast Transient Response2% Tolerance Over Specified Conditions forFixed-Output VersionsOpen Drain Power-On Reset With 200-msDelay (See TPS768xx for PG Option)8-Pin SOIC and 20-Pin TSSOP PowerPAD™(PWP) PackageThermal Shutdown ProtectionGND/HSINKGND/HSINKGNDNCENININNCGND/HSINKGND/HSINK1234 567891020191817161514131211GND/HSINKGND/HSINKNCNCRESETFB/NCOUTOUTGND/HSINKGND/HSINKNC – No internal connectionD PACKAGE(TOP VIEW)descriptionThis device is designed to have a fast transientresponse and be stable with 10-µF low ESRcapacitors. This combination provides highperformance at a reasonable cost.TPS76733DROPOUT VOLTAGEvsFREE-AIR TEMPERATURE103∆VO– Change inOutput Voltage – mVIO = 1 AVDO– Dropout Voltage – mV102100500–50–10010.50GNDENININ12348765RESETFB/NCOUTOUTTPS76733LOAD TRANSIENT RESPONSECL = 100 µFTA = 25°C101100IO = 10 mA10–1CO = 10 µF02040IO = 0608010012014010–2–60–40–20I O – Output Current – A0204060TA – Free-Air Temperature – °C80100120140160180200t – Time – µsPlease be aware that an important notice concerning availability, standard warranty, and use in critical applications ofTexasInstruments semiconductor products and disclaimers thereto appears at the end of this data sheet.PowerPAD is a trademark of Texas Instruments Incorporated.PRODUCTION DATA information is current as of publication date.Products conform to specifications per the terms of Texas Instrumentsstandard warranty. Production processing does not necessarily includetesting of all parameters.Copyright © 1999, Texas Instruments IncorporatedPOST OFFICE BOX 655303 DALLAS, TEXAS 75265•1元器件交易网www.cecb2b.comSLVS208C – MAY 1999 – REVISED SEPTEMBER 1999TPS76715Q, TPS76718Q, TPS76725Q, TPS76727QTPS76728Q, TPS76730Q TPS76733Q, TPS76750Q, TPS76701QFAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORSdescription (continued) Because the PMOS device behaves as a low-value resistor, the dropout voltage is very low (typically 230 mVat an output current of 1 A for the TPS76750) and is directly proportional to the output current. Additionally, sincethe PMOS pass element is a voltage-driven device, the quiescent current is very low and independent of outputloading (typically 85 µA over the full range of output current, 0 mA to 1 A). These two key specifications yielda significant improvement in operating life for battery-powered systems. This LDO family also features a sleepmode; applying a TTL high signal to EN (enable) shuts down the regulator, reducing the quiescent current to1 µA at TJ = 25°C.The RESET output of the TPS767xx initiates a reset in microcomputer and microprocessor systems in the eventof an undervoltage condition. An internal comparator in the TPS767xx monitors the output voltage of theregulator to detect an undervoltage condition on the regulated output voltage.The TPS767xx is offered in 1.5-V, 1.8-V, 2.5-V, 2.7-V, 2.8-V, 3.0-V, 3.3-V and 5.0-V fixed-voltage versions andin an adjustable version (programmable over the range of 1.5 V to 5.5 V). Output voltage tolerance is specifiedas a maximum of 2% over line, load, and temperature ranges. The TPS767xx family is available in 8 pin SOICand 20 pin PWP packages.AVAILABLE OPTIONSOUTPUTVOLTAGE(V)TYP5.03.33.02.8–40°CC to 125to125°C2.72.51.81.5Adjustable1.5 V to 5.5 VPACKAGED DEVICESTSSOP(PWP)TPS76750QTPS76733QTPS76730QTPS76728QTPS76727QTPS76725QTPS76718QTPS76715QTPS76701QSOIC(D)TPS76750QTPS76733QTPS76730QTPS76728QTPS76727QTPS76725QTPS76718QTPS76715QTPS76701QTJThe TPS76701 is programmable using an external resistor divider (see applicationinformation). The D and PWP packages are available taped and reeled. Add an Rsuffix to the device type (e.g., TPS76701QDR).TPS767xxVI67ININOUT0.1 µF5ENGND3OUT1413+VOCO†10 µFRESET16RESET†See application information section for capacitor selection details.Figure 1. Typical Application Configuration (For Fixed Output Options)2POST OFFICE BOX 655303 DALLAS, TEXAS 75265•元器件交易网www.cecb2b.com TPS76715Q, TPS76718Q, TPS76725Q, TPS76727QTPS76728Q, TPS76730Q TPS76733Q, TPS76750Q, TPS76701QFAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORSSLVS208C – MAY 1999 – REVISED SEPTEMBER 1999functional block diagram—adjustable versionINENRESET_+OUT+_Vref = 1.1834 V200 ms DelayFB/NCR1R2GNDExternal to the devicefunctional block diagram—fixed-voltage versionINENRESET_+OUT+_Vref = 1.1834 V200 ms DelayR1R2GNDPOST OFFICE BOX 655303 DALLAS, TEXAS 75265•3元器件交易网www.cecb2b.comSLVS208C – MAY 1999 – REVISED SEPTEMBER 1999TPS76715Q, TPS76718Q, TPS76725Q, TPS76727QTPS76728Q, TPS76730Q TPS76733Q, TPS76750Q, TPS76701QFAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORSTerminal Functions – SOIC PackageTERMINALNAMEENFB/NCGNDINOUTRESETNO.2713, 45, 68IOOI/OIIEnable inputFeedback input voltage for adjustable device (no connect for fixed options)Regulator groundInput voltageRegulated output voltageRESET outputDESCRIPTION Terminal Functions – PWP PackageTERMINALNAMEENFB/NCGNDGND/HSINKINNCOUTRESETNO.51531, 2, 9, 10, 11,12, 19, 206, 74, 8, 17, 1813, 1416OOII/OIIEnable inputFeedback input voltage for adjustable device (no connect for fixed options)Regulator groundGround/heatsinkInput voltageNo connectRegulated output voltageRESET outputDESCRIPTION4POST OFFICE BOX 655303 DALLAS, TEXAS 75265•元器件交易网www.cecb2b.com TPS76715Q, TPS76718Q, TPS76725Q, TPS76727QTPS76728Q, TPS76730Q TPS76733Q, TPS76750Q, TPS76701QFAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORSSLVS208C – MAY 1999 – REVISED SEPTEMBER 1999timing diagramVIVres†tVOThresholdVoltageVIT–‡VIT+‡VIT+‡Less than 5% of theoutput voltageVresVIT–‡tRESETOutput200 msDelay200 msDelayOutputUndefinedOutputUndefinedt†Vres is the minimum input voltage for a valid RESET. The symbol Vres is not currently listed within EIA or JEDEC standardsfor semiconductor symbology.‡VIT –Trip voltage is typically 5% lower than the output voltage (95%VO) VIT–to VIT+ is the hysteresis voltage.POST OFFICE BOX 655303 DALLAS, TEXAS 75265•5元器件交易网www.cecb2b.comSLVS208C – MAY 1999 – REVISED SEPTEMBER 1999TPS76715Q, TPS76718Q, TPS76725Q, TPS76727QTPS76728Q, TPS76730Q TPS76733Q, TPS76750Q, TPS76701QFAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORS absolute maximum ratings over operating free-air temperature range (unless otherwise noted)ĔInput voltage range‡, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to 13.5 VVoltage range at EN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to VI + 0.3 VMaximum RESET voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.5 VPeak output current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Internally limitedOutput voltage, VO (OUT, FB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 VContinuous total power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See dissipation rating tablesOperating virtual junction temperature range, TJ –40. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . °C to 125°CStorage temperature range, Tstg –65. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . °C to 150°CESD rating, HBM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 kV†Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, andfunctional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is notimplied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.‡All voltage values are with respect to network terminal ground.DISSIPATION RATING TABLE 1 – FREE-AIR TEMPERATURESPACKAGEDAIR FLOW(CFM)0250TA < 25°CPOWER RATING568 mW904 mWDERATING FACTORABOVE TA = 25°C5.68 mW/°C9.04 mW/°CTA = 70°CPOWER RATING312 mW497 mWTA = 85°CPOWER RATING227 mW361 mWDISSIPATION RATING TABLE 2 – FREE-AIR TEMPERATURESPACKAGEPWP#PWP||AIR FLOW(CFM)03000300TA < 25°CPOWER RATING2.9 W4.3 W3 W7.2 WDERATING FACTORABOVE TA = 25°C23.5 mW/°C34.6 mW/°C23.8 mW/°C57.9 mW/°CTA = 70°CPOWER RATING1.9 W2.8 W1.9 W4.6 WTA = 85°CPOWER RATING1.5 W2.2 W1.5 W3.8 W#This parameter is measured with the recommended copper heat sink pattern on a 1-layer PCB, 5-in × 5-in PCB, 1 oz. copper,2-in × 2-in coverage (4 in2).||This parameter is measured with the recommended copper heat sink pattern on a 8-layer PCB, 1.5-in × 2-in PCB, 1 oz. copperwith layers 1, 2, 4, 5, 7, and 8 at 5% coverage (0.9 in2) and layers 3 and 6 at 100% coverage (6 in2). For more information, referto TI technical brief SLMA002.recommended operating conditionsMINInput voltage, VIkOutput voltage range, VOOutput current, IO (Note 1)Operating virtual junction temperature, TJ (Note 1)2.71.50–40MAX105.51.0125UNITVV A°Ck To calculate the minimum input voltage for your maximum output current, use the following equation: VI(min) = VO(max) + VDO(max load).NOTE 1:Continuous current and operating junction temperature are limited by internal protection circuitry, but it is not recommended that thedevice operate under conditions beyond those specified in this table for extended periods of time.6POST OFFICE BOX 655303 DALLAS, TEXAS 75265•元器件交易网www.cecb2b.com TPS76715Q, TPS76718Q, TPS76725Q, TPS76727QTPS76728Q, TPS76730Q TPS76733Q, TPS76750Q, TPS76701QFAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORSSLVS208C – MAY 1999 – REVISED SEPTEMBER 1999electrical characteristics over recommended operating free-air temperature range,Vi = VO(typ) + 1 V, IO = 1 mA, EN = 0 V, CO = 10 µF (unless otherwise noted)PARAMETERTPS76701TPS76715TPS76718TPS76725Output voltage (10µA to 1 A load)(10 Ato1Aload)(see Note 2)TPS76727TPS76728TPS76730TPS76733TPS76750Quiescent current (GND current)()EN = 0V, (see Note 2)Output voltage line regulation (∆VO/VO)(see Notes 2 and 3)Load regulationOutput noise voltageOutput current LimitThermal shutdown junction temperatureEN = VI,StandbycurrentStandby currentEN = VI,TPS76701FB = 1.5 V1.70.9f = 1 KHz, TJ = 25°CIO(RESET) = 300µAVO decreasingMeasured at VOVI = 2.7 V,V(RESET) = 5 V200 IO(RESET) = 1mACO = 10 µF, 601.1920.50.150.4198TJ = 25°C,2.7 V < VI < 10 VTJ = –40°C to 125°C2.7 V < VI < 10 V2BW = 300 Hz to 50 kHz, CO = 10 µF, TJ = 25°CVO = 0 VTEST CONDITIONS1.5 V ≤ VO ≤ 5.5 V, 1.5 V ≤ VO ≤ 5.5 V, TJ = 25°C,TJ = –40°C to 125°C,TJ = 25°C,TJ = –40°C to 125°C,TJ = 25°C,TJ = –40°C to 125°C,TJ = 25°C,TJ = –40°C to 125°C,TJ = 25°C,TJ = –40°C to 125°C,TJ = 25°C,TJ = –40°C to 125°C,TJ = 25°C,TJ = –40°C to 125°C,TJ = 25°C,TJ = –40°C to 125°C,10 µA < IO < 1 A,IO = 1 A,TJ = 25°CTJ = –40°C to 125°C2.7 V < VIN < 10 V2.7 V < VIN < 10 V2.8 V < VIN < 10 V2.8 V < VIN < 10 V3.5 V < VIN < 10 V3.5 V < VIN < 10 V3.7 V < VIN < 10 V3.7 V < VIN < 10 V3.8 V < VIN < 10 V3.8 V < VIN < 10 V4.0 V < VIN < 10 V4.0 V < VIN < 10 V4.3 V < VIN < 10 V4.3 V < VIN < 10 V6.0 V < VIN < 10 V6.0 V < VIN < 10 VTJ = 25°CTJ = –40°C to 125°C0.0131901.71501102MIN0.98VO1.51.4701.81.7642.52.4502.72.6462.82.7443.02.9403.33.2345.04.900851255.100µA%/VmVµVrmsA°CµAµAnAVVdBV%VO%VOVµAms3.3663.0602.8562.7542.550V1.8361.530TYPVO1.02VOMAXUNITVO + 1 V < VI ≤ 10 V,TJ = 25°CFB input currentHigh level enable input voltageLow level enable input voltagePower supply ripple rejection (see Note 2)Minimum input voltage for valid RESETTrip threshold voltageResetHysteresis voltageOutput low voltageLeakage currentRESET time-out delayNOTE 2:Minimum IN operating voltage is 2.7 V or VO(typ) + 1 V, whichever is greater. Maximum IN voltage 10V.POST OFFICE BOX 655303 DALLAS, TEXAS 75265•7元器件交易网www.cecb2b.comSLVS208C – MAY 1999 – REVISED SEPTEMBER 1999TPS76715Q, TPS76718Q, TPS76725Q, TPS76727QTPS76728Q, TPS76730Q TPS76733Q, TPS76750Q, TPS76701QFAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORS electrical characteristics over recommended operating free-air temperature range,Vi = VO(typ) + 1 V, IO = 1 mA, EN = 0 V, CO = 10 µF (unless otherwise noted) (continued)PARAMETERInputcurrent(EN)Input current (EN)TPS76728TPS76730TPS76733TPS76750EN = 0 VEN = VIIO = 1 A,IO = 1 A,IO = 1 A,IO = 1 A,IO = 1 A,IO = 1 A,IO = 1 A,IO = 1 A,TJ = 25°CTJ = –40°C to 125°CTJ = 25°CTJ = –40°C to 125°CTJ = 25°CTJ = –40°C to 125°CTJ = 25°CTJ = –40°C to 125°CTEST CONDITIONSMIN–1–1500825450675350575230380mVTYP0MAX11UNITµADropout voltage(See Note 4)(SeeNote4)NOTES:3.If VO≤ 1.8 V then Vimax = 10 V, Vimin = 2.7 V:LineReg.(mV)+ǒ%ńVǓ If VO ≥ 2.5 V then Vimax = 10 V, Vimin = VO + 1 V:VOǒVimax*2.7VǓ100 1000LineReg.(mV)+ǒ%ńVǓ VOǒVimax*ǒVO)1VǓǓ100 10004.IN voltage equals VO(Typ) – 100 mV; TPS76701 output voltage set to 3.3 V nominal with external resistor divider. TPS76715,TPS76718, TPS76725, and TPS76727 dropout voltage limited by input voltage range limitations (i.e., TPS76730 input voltage needsto drop to 2.9 V for purpose of this test).Table of GraphsFIGUREVOOutputvoltageOutput voltageGround currentPower supply ripple rejectionOutput noiseZoVDOOutput impedanceDropout voltageLine transient responseLoad transient responseOutput voltageDropout voltageEquivalent series resistance (ESR)vs Timevs Input voltagevs Output currentvs Output currentvs Free-air temperaturevs Free-air temperaturevs Frequencyvs Frequencyvs Frequencyvs Free-air temperature2, 3, 45, 6, 78, 91011121314, 1615, 17181921 – 248POST OFFICE BOX 655303 DALLAS, TEXAS 75265•元器件交易网www.cecb2b.com TPS76715Q, TPS76718Q, TPS76725Q, TPS76727QTPS76728Q, TPS76730Q TPS76733Q, TPS76750Q, TPS76701QFAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORSSLVS208C – MAY 1999 – REVISED SEPTEMBER 1999TYPICAL CHARACTERISTICSTPS76733TPS76715OUTPUT VOLTAGEvsOUTPUT CURRENT3.28353.28303.28253.28203.2815VI = 4.3 VTA = 25°COUTPUT VOLTAGEvsOUTPUT CURRENT1.49851.49801.49751.49701.4965VI = 2.7 VTA = 25°CVO– Output Voltage – V3.28103.28053.2800VO– Output Voltage – V1.49601.49551.495000.10.20.30.40.50.60.70.8IO – Output Current – A0.9100.10.20.30.40.50.60.70.80.91IO – Output Current – AFigure 2TPS76725Figure 3TPS76733OUTPUT VOLTAGEvsOUTPUT CURRENT2.49602.49552.4950VO– Output Voltage – V2.49452.49402.49352.49302.49252.4920VO– Output Voltage – VVI = 3.5 VTA = 25°C3.32OUTPUT VOLTAGEvsFREE-AIR TEMPERATUREVI = 4.3 V3.313.303.29IO = 1 A3.283.273.263.25–60–40–20IO = 1 mA00.10.20.30.40.50.60.70.80.91020406080100120140IO – Output Current – ATA – Free-Air Temperature – °CFigure 4Figure 5POST OFFICE BOX 655303 DALLAS, TEXAS 75265•9元器件交易网www.cecb2b.comSLVS208C – MAY 1999 – REVISED SEPTEMBER 1999TPS76715Q, TPS76718Q, TPS76725Q, TPS76727QTPS76728Q, TPS76730Q TPS76733Q, TPS76750Q, TPS76701QFAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORSTYPICAL CHARACTERISTICSTPS76715TPS76725 OUTPUT VOLTAGEvsFREE-AIR TEMPERATURE1.515VI = 2.7 V1.510VO– Output Voltage – VVO– Output Voltage – V2.5102.5052.5002.4952.4902.4852.480–60–402.515OUTPUT VOLTAGEvsFREE-AIR TEMPERATUREVI = 3.5 V1.5051.500IO = 1 AIO = 1 mAIO = 1 A1.495IO = 1 mA1.4901.485–60–40–20020406080100120140–20020406080100120TA – Free-Air Temperature – °CTA – Free-Air Temperature – °CFigure 6TPS76733Figure 7TPS76715GROUND CURRENTvsFREE-AIR TEMPERATURE929088Ground Current – µA8684828078767472–60–40–20020406080100120140IO = 1 AIO = 500 mAIO = 1 mAVI = 4.3 V95Ground Current – µA100GROUND CURRENTvsFREE-AIR TEMPERATUREVI = 2.7 V90IO = 1 mAIO = 1 A85IO = 500 mA8075–60–40–20020406080100120140TA – Free-Air Temperature – °CTA – Free-Air Temperature – °CFigure 8Figure 910POST OFFICE BOX 655303 DALLAS, TEXAS 75265•元器件交易网www.cecb2b.com TPS76715Q, TPS76718Q, TPS76725Q, TPS76727QTPS76728Q, TPS76730Q TPS76733Q, TPS76750Q, TPS76701QFAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORSSLVS208C – MAY 1999 – REVISED SEPTEMBER 1999TYPICAL CHARACTERISTICSTPS76733TPS76733POWER SUPPLY RIPPLE REJECTIONvsFREQUENCY90PSRR – Power Supply Ripple Rejection – dBOutput Spectral Noise Density – µVHz80706050403020100–10101001k10k100k1MVI = 4.3 VCO = 10 µFIO = 1 ATA = 25°COUTPUT SPECTRAL NOISE DENSITYvsFREQUENCY10–5VI = 4.3 VCO = 10 µFTA = 25°CIO = 7 mA10–6IO = 1 A10–710–8102103f – Frequency – Hz104105f – Frequency – HzFigure 10TPS76733Figure 11TPS76733OUTPUT IMPEDANCEvsFREQUENCY0VI = 4.3 VCO = 10 µFTA = 25°CIO = 1 mAVDO– Dropout Voltage – mVZo– Output Impedance –Ω103DROPOUT VOLTAGEvsFREE-AIR TEMPERATUREIO = 1 A10210110–1100IO = 10 mAIO = 1 A10–1CO = 10 µFIO = 002040608010012014010–2101102103104f – Frequency – kHz10510610–2–60–40–20TA – Free-Air Temperature – °CFigure 12Figure 13POST OFFICE BOX 655303 DALLAS, TEXAS 75265•11元器件交易网www.cecb2b.comSLVS208C – MAY 1999 – REVISED SEPTEMBER 1999TPS76715Q, TPS76718Q, TPS76725Q, TPS76727QTPS76728Q, TPS76730Q TPS76733Q, TPS76750Q, TPS76701QFAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORSTYPICAL CHARACTERISTICSTPS76715TPS76715 LINE TRANSIENT RESPONSE100VI– Input Voltage – V3.7∆VO– Change inOutput Voltage – mV500–50–100I O – Output Current – A∆VO– Change inOutput Voltage – mV100–10CL = 10 µFTA = 25°C020406080100120140160180200t – Time – µs10.50LOAD TRANSIENT RESPONSECL = 100 µFTA = 25°C2.7020406080100120140160180200t – Time – µsFigure 14TPS76733Figure 15TPS76733LINE TRANSIENT RESPONSEVI– Input Voltage – V100CL = 10 µFTA = 25°C5.3∆VO– Change inOutput Voltage – mV500–50–10010.50LOAD TRANSIENT RESPONSECL = 100 µFTA = 25°C4.3100–10I O – Output Current – A∆VO– Change inOutput Voltage – mV020406080100120140160180200t – Time – µs020406080100120140160180200t – Time – µsFigure 16Figure 1712POST OFFICE BOX 655303 DALLAS, TEXAS 75265•元器件交易网www.cecb2b.com TPS76715Q, TPS76718Q, TPS76725Q, TPS76727QTPS76728Q, TPS76730Q TPS76733Q, TPS76750Q, TPS76701QFAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORSSLVS208C – MAY 1999 – REVISED SEPTEMBER 1999TYPICAL CHARACTERISTICSTPS76733TPS76701OUTPUT VOLTAGEvsTIME (AT STARTUP)4VO– Output Voltage – V3210Enable Pulse – VVDO– Dropout Voltage – mV900DROPOUT VOLTAGEvsINPUT VOLTAGEIO = 1 A80070060050040030020010002.533.54VI – Input Voltage – V4.55TA = –40°CTA = 25°CTA = 125°C0020406080100120140160180200t – Time – µsFigure 18Figure 19VIINOUT+ENTo LoadCOGNDESRRLFigure 20. Test Circuit for Typical Regions of Stability (Figures 21 through 24) (Fixed Output Options)POST OFFICE BOX 655303 DALLAS, TEXAS 75265•13元器件交易网www.cecb2b.comSLVS208C – MAY 1999 – REVISED SEPTEMBER 1999TPS76715Q, TPS76718Q, TPS76725Q, TPS76727QTPS76728Q, TPS76730Q TPS76733Q, TPS76750Q, TPS76701QFAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORSTYPICAL CHARACTERISTICSTYPICAL REGION OF STABILITYTYPICAL REGION OF STABILITY EQUIVALENT SERIES RESISTANCE†vsOUTPUT CURRENT10ESR – Equivalent Series Resistance –ΩESR – Equivalent series restance –ΩRegion of Instability10EQUIVALENT SERIES RESISTANCE†vsOUTPUT CURRENTRegion of InstabilityVo = 3.3 VCl = 4.7 µFVI = 4.3 VTJ = 125°C11Region of StabilityVo = 3.3 VCL = 4.7 µFVI = 4.3 VTA = 25°C02004006008001000IO – Output Current – mARegion of Stability0.10.102004006008001000IO – Output Current – mAFigure 21TYPICAL REGION OF STABILITYFigure 22TYPICAL REGION OF STABILITYEQUIVALENT SERIES RESISTANCE†vsOUTPUT CURRENT10ESR – Equivalent series restance –ΩESR – Equivalent series restance –Ω10EQUIVALENT SERIES RESISTANCE†vsOUTPUT CURRENTRegion of InstabilityRegion of Instability11Vo = 3.3 VCl = 22 µFVI = 4.3 VTJ = 125°CRegion of StabilityVo = 3.3 VCL = 22 µFVI = 4.3 VTA = 25°C02004006008001000Region of Stability0.10.102004006008001000IO – Output Current – mAIO – Output Current – mAFigure 23Figure 24†Equivalent series resistance (ESR) refers to the total series resistance, including the ESR of the capacitor, any series resistance addedexternally, and PWB trace resistance to CO.14POST OFFICE BOX 655303 DALLAS, TEXAS 75265•元器件交易网www.cecb2b.com TPS76715Q, TPS76718Q, TPS76725Q, TPS76727QTPS76728Q, TPS76730Q TPS76733Q, TPS76750Q, TPS76701QFAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORSSLVS208C – MAY 1999 – REVISED SEPTEMBER 1999APPLICATION INFORMATIONThe TPS767xx family includes eight fixed-output voltage regulators (1.5 V, 1.8 V, 2.5 V, 2.7 V, 2.8 V, 3.0 V,3.3 V, and 5.0 V), and an adjustable regulator, the TPS76701 (adjustable from 1.5 V to 5.5 V).device operationThe TPS767xx features very low quiescent current, which remains virtually constant even with varying loads.Conventional LDO regulators use a pnp pass element, the base current of which is directly proportional to theload current through the regulator (IB = IC/β). The TPS767xx uses a PMOS transistor to pass current; becausethe gate of the PMOS is voltage driven, operating current is low and invariable over the full load range.Another pitfall associated with the pnp-pass element is its tendency to saturate when the device goes intodropout. The resulting drop in β forces an increase in IB to maintain the load. During power up, this translatesto large start-up currents. Systems with limited supply current may fail to start up. In battery-powered systems,it means rapid battery discharge when the voltage decays below the minimum required for regulation. TheTPS767xx quiescent current remains low even when the regulator drops out, eliminating both problems.The TPS767xx family also features a shutdown mode that places the output in the high-impedance state(essentially equal to the feedback-divider resistance) and reduces quiescent current to 2 µA. If the shutdownfeature is not used, EN should be tied to ground. Response to an enable transition is quick; regulated outputvoltage is typically reestablished in 120 µs.minimum load requirementsThe TPS767xx family is stable even at zero load; no minimum load is required for operation.FB - pin connection (adjustable version only)The FB pin is an input pin to sense the output voltage and close the loop for the adjustable option . The outputvoltage is sensed through a resistor divider network to close the loop as it is shown in Figure 26. Normally, thisconnection should be as short as possible; however, the connection can be made near a critical circuit toimprove performance at that point. Internally, FB connects to a high-impedance wide-bandwidth amplifier andnoise pickup feeds through to the regulator output. Routing the FB connection to minimize/avoid noise pickupis essential.external capacitor requirementsAn input capacitor is not usually required; however, a ceramic bypass capacitor (0.047 µF or larger) improvesload transient response and noise rejection if the TPS767xx is located more than a few inches from the powersupply. A higher-capacitance electrolytic capacitor may be necessary if large (hundreds of milliamps) loadtransients with fast rise times are anticipated.Like all low dropout regulators, the TPS767xx requires an output capacitor connected between OUT and GNDto stabilize the internal control loop. The minimum recommended capacitance value is 10 µF and the ESR(equivalent series resistance) must be between 50 mΩ and 1.5 Ω. Capacitor values 10 µF or larger areacceptable, provided the ESR is less than 1.5 Ω. Solid tantalum electrolytic, aluminum electrolytic, andmultilayer ceramic capacitors are all suitable, provided they meet the requirements described above. Most ofthe commercially available 10 µF surface-mount ceramic capacitors, including devices from Sprague andKemet, meet the ESR requirements stated above.POST OFFICE BOX 655303 DALLAS, TEXAS 75265•15元器件交易网www.cecb2b.comSLVS208C – MAY 1999 – REVISED SEPTEMBER 1999TPS76715Q, TPS76718Q, TPS76725Q, TPS76727QTPS76728Q, TPS76730Q TPS76733Q, TPS76750Q, TPS76701QFAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORSAPPLICATION INFORMATIONexternal capacitor requirements (continued)TPS767xxVI67ININOUT5ENOUT1413+CO10 µFRESET16RESET250 kΩVO C10.1 µFGND3Figure 25. Typical Application Circuit (Fixed Versions)programming the TPS76701 adjustable LDO regulatorThe output voltage of the TPS76701 adjustable regulator is programmed using an external resistor divider asshown in Figure 26. The output voltage is calculated using:VWhereVref = 1.1834 V typ (the internal reference voltage)Resistors R1 and R2 should be chosen for approximately 50-µA divider current. Lower value resistors can beused but offer no inherent advantage and waste more power. Higher values should be avoided as leakagecurrents at FB increase the output voltage error. The recommended design procedure is to chooseR2 = 30.1kΩ to set the divider current at 50 µA and then calculate R1 using:R1+O+V 1)R1refR2ǒǓ(1)ǒO*1VrefVǓ R2OUTPUT VOLTAGEPROGRAMMING GUIDEReset Output250 kΩOUTPUTVOLTAGE2.5 VVOR1FB / NCGNDCO3.3 V3.6 V4.75 VR133.253.661.990.8R230.130.130.130.1UNITkΩkΩkΩkΩ(2)TPS76701VI0.1 µF≥1.7 V≤0.9 VENOUTINRESETR2Figure 26. TPS76701 Adjustable LDO Regulator Programming16POST OFFICE BOX 655303 DALLAS, TEXAS 75265•元器件交易网www.cecb2b.com TPS76715Q, TPS76718Q, TPS76725Q, TPS76727QTPS76728Q, TPS76730Q TPS76733Q, TPS76750Q, TPS76701QFAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORSSLVS208C – MAY 1999 – REVISED SEPTEMBER 1999APPLICATION INFORMATIONreset indicatorThe TPS767xx features a RESET output that can be used to monitor the status of the regulator. The internalcomparator monitors the output voltage: when the output drops to between 92% and 98% of its nominalregulated value, the RESET output transistor turns on, taking the signal low. The open-drain output requiresa pullup resistor. If not used, it can be left floating. RESET can be used to drive power-on reset circuitry or asa low-battery indicator. RESET does not assert itself when the regulated output voltage falls outside thespecified 2% tolerance, but instead reports an output voltage low relative to its nominal regulated value (referto timing diagram for start-up sequence).regulator protectionThe TPS767xx PMOS-pass transistor has a built-in back diode that conducts reverse currents when the inputvoltage drops below the output voltage (e.g., during power down). Current is conducted from the output to theinput and is not internally limited. When extended reverse voltage is anticipated, external limiting may beappropriate.The TPS767xx also features internal current limiting and thermal protection. During normal operation, theTPS767xx limits output current to approximately 1.7 A. When current limiting engages, the output voltage scalesback linearly until the overcurrent condition ends. While current limiting is designed to prevent gross devicefailure, care should be taken not to exceed the power dissipation ratings of the package. If the temperature ofthe device exceeds 150°C(typ), thermal-protection circuitry shuts it down. Once the device has cooled below130°C(typ), regulator operation resumes.power dissipation and junction temperatureSpecified regulator operation is assured to a junction temperature of 125°C; the maximum junction temperatureshould be restricted to 125°C under normal operating conditions. This restriction limits the power dissipationthe regulator can handle in any given application. To ensure the junction temperature is within acceptable limits,calculate the maximum allowable dissipation, PD(max), and the actual dissipation, PD, which must be less thanor equal to PD(max).The maximum-power-dissipation limit is determined using the following equation:PWhereTJmax is the maximum allowable junction temperatureRθJA is the thermal resistance junction-to-ambient for the package, i.e., 172°C/W for the 8-terminalSOIC and 32.6°C/W for the 20-terminal PWP with no airflow.TA is the ambient temperature.The regulator dissipation is calculated using:PD+V*V IIOOTmax*TA+JD(max)RqJAǒǓPower dissipation resulting from quiescent current is negligible. Excessive power dissipation will trigger thethermal protection circuit.POST OFFICE BOX 655303 DALLAS, TEXAS 75265•17元器件交易网www.cecb2b.comSLVS208C – MAY 1999 – REVISED SEPTEMBER 1999TPS76715Q, TPS76718Q, TPS76725Q, TPS76727QTPS76728Q, TPS76730Q TPS76733Q, TPS76750Q, TPS76701QFAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORSMECHANICAL DATAD (R-PDSO-G**) 14 PIN SHOWNPINS **DIM0.020 (0,51)0.014 (0,35)148A MIN0.244 (6,20)0.228 (5,80)0.157 (4,00)0.150 (3,81)0.189(4,80)0.337(8,55)0.386(9,80)0.010 (0,25)MA MAX PLASTIC SMALL-OUTLINE PACKAGE0.050 (1,27)80.197(5,00)140.344(8,75)160.394(10,00)0.008 (0,20) NOM1A7Gage Plane0.010 (0,25)0°–8°0.044 (1,12)0.016 (0,40)Seating Plane0.069 (1,75) MAX0.010 (0,25)0.004 (0,10)0.004 (0,10)4040047/B 03/95NOTES:A.B.C.D.E.All linear dimensions are in inches (millimeters).This drawing is subject to change without notice.Body dimensions do not include mold flash or protrusion, not to exceed 0.006 (0,15).Four center pins are connected to die mount pad.Falls within JEDEC MS-01218POST OFFICE BOX 655303 DALLAS, TEXAS 75265•元器件交易网www.cecb2b.com TPS76715Q, TPS76718Q, TPS76725Q, TPS76727QTPS76728Q, TPS76730Q TPS76733Q, TPS76750Q, TPS76701QFAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORSSLVS208C – MAY 1999 – REVISED SEPTEMBER 1999MECHANICAL DATAPWP (R-PDSO-G**) 20-PIN SHOWNPowerPAD™ PLASTIC SMALL-OUTLINE PACKAGE0,65200,300,19110,10MThermal Pad(See Note D)4,504,306,606,200,15 NOMGage Plane1A100°–8°0,250,750,50Seating Plane1,20 MAX0,150,05PINS **DIMA MAXA MIN0,10145,104,90165,104,90206,606,40247,907,70289,809,604073225/E 03/97NOTES:A.B.C.D.All linear dimensions are in millimeters.This drawing is subject to change without notice.Body dimensions do not include mold flash or protrusions.The package thermal performance may be enhanced by bonding the thermal pad to an external thermal plane. This pad is electricallyand thermally connected to the backside of the die and possibly selected leads.E.Falls within JEDEC MO-153PowerPAD is a trademark of Texas Instruments Incorporated.POST OFFICE BOX 655303 DALLAS, TEXAS 75265•19元器件交易网www.cecb2b.com
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