电源模块TPS767D318

TPS767D301,TPS767D318,TPS767D325DUAL-OUTPUTLOW-DROPOUTVOLTAGEREGULATORSSLVS209B–JULY1999–REVISEDAPRIL20001POSTOFFICEBOX655303•DALLAS,TEXAS75265DualOutputVoltagesforSplit-SupplyApplicationsOutputCurrentRangeof0mAto1.0APerRegulator3.3-V/2.5-V,3.3-V/1.8-V,and3.3-V/AdjustableOutputFast-TransientResponse2%ToleranceOverLoadandTemperatureDropoutVoltageTypically350mVat1AUltraLow85mATypicalQuiescentCurrent1mAQuiescentCurrentDuringShutdownDualOpenDrainPower-OnResetWith200-msDelayforEachRegulator28-PinPowerPADTSSOPPackageThermalShutdownProtectionforEachRegulatordescriptionTheTPS767D3xxfamilyofdualvoltageregulatorsoffersfasttransientresponse,lowdropoutvoltagesanddualoutputsinacompactpackageandincorporatingstabilitywith10-mFlowESRoutputcapacitors.t–Time–msLOADTRANSIENTRESPONSEI–OutputCurrent–AOVO–ChangeinDOutputVoltage–mV10.5604020801001401201601802000VO=3.3VCL=100mFTA=25°C0050100–50–100TA–Free-AirTemperature–°C–40020120103–60406080100–DropoutVoltage–mVVDODROPOUTVOLTAGEvsFREE-AIRTEMPERATURE10210110010–110–2–20140IO=1AIO=10mAIO=0VO=3.3VCO=10mFCopyright2000,TexasInstrumentsIncorporatedPRODUCTIONDATAinformationiscurrentasofpublicationdate.ProductsconformtospecificationsperthetermsofTexasInstrumentsstandardwarranty.Productionprocessingdoesnotnecessarilyincludetestingofallparameters.Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsofTexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.PowerPADisatrademarkofTexasInstrumentsIncorporated.12345678910111213142827262524232221201918171615NCNC1GND1EN1IN1INNCNC2GND2EN2IN2INNCNC1RESETNCNC1FB/NC1OUT1OUT2RESETNCNCNC2OUT2OUTNCNCPWPPACKAGE(TOPVIEW)NC–NointernalconnectionTPS767D301,TPS767D318,TPS767D325DUAL-OUTPUTLOW-DROPOUTVOLTAGEREGULATORSSLVS209B–JULY1999–REVISEDAPRIL20002POSTOFFICEBOX655303•DALLAS,TEXAS75265description(continued)TheTPS767D3xxfamilyofdualvoltageregulatorsisdesignedprimarilyforDSPapplications.Thesedevicescanbeusedinanymixed-outputvoltageapplication,witheachregulatorsupportingupto1A.Dualactive-lowresetsignalsallowresettingofcore-logicandI/Oseparately.BecausethePMOSdevicebehavesasalow-valueresistor,thedropoutvoltageisverylow(typically350mVatanoutputcurrentof1AfortheTPS767D325)andisdirectlyproportionaltotheoutputcurrent.Additionally,sincethePMOSpasselementisavoltage-drivendevice,thequiescentcurrentisverylowandindependentofoutputloading(typically85mAoverthefullrangeofoutputcurrent,0mAto1A).Thesetwokeyspecificationsyieldasignificantimprovementinoperatinglifeforbattery-poweredsystems.ThisLDOfamilyalsofeaturesasleepmode;applyingaTTLhighsignaltoEN(enable)shutsdowntheregulator,reducingthequiescentcurrentto1mAatTJ=25°C.TheRESEToutputoftheTPS767D3xxinitiatesaresetinmicrocomputerandmicroprocessorsystemsintheeventofanundervoltagecondition.AninternalcomparatorintheTPS767D3xxmonitorstheoutputvoltageoftheregulatortodetectanundervoltageconditionontheregulatedoutputvoltage.TheTPS767D3xxisofferedin1.8-V,2.5-V,and3.3-Vfixed-voltageversionsandinanadjustableversion(programmableovertherangeof1.5Vto5.5V).Outputvoltagetoleranceisspecifiedasamaximumof2%overline,load,andtemperatureranges.TheTPS767D3xxfamilyisavailablein28pinPWPTSSOPpackage.Theyoperateoverajunctiontemperaturerangeof–40°Cto125°C.AVAILABLEOPTIONSTAREGULATOR1VO(V)REGULATOR2VO(V)TSSOP(PWP)Adj(1.5–5.5V)3.3VTPS767D301PWP–40°Cto125°C1.8V3.3VTPS767D318PWP2.5V3.3VTPS767D325PWPTheTPS767D301isadjustableusinganexternalresistordivider(seeapplicationinformation).ThePWPpackagesareavailabletapedandreeled.AddanRsuffixtothedevicetype(e.g.,TPS767D301PWPR).RESETOUTOUT654ININENGND3282423VIC10.1mF50VRESETVO10mF+TPS767D3xxCO250kWFigure1.TypicalApplicationCircuit(FixedVersions)forSingleChannelTPS767D301,TPS767D318,TPS767D325DUAL-OUTPUTLOW-DROPOUTVOLTAGEREGULATORSSLVS209B–JULY1999–REVISEDAPRIL20003POSTOFFICEBOX655303•DALLAS,TEXAS75265functionalblockdiagram—adjustableversion(foreachLDO)_+Vref=1.1834VOUTENGNDR1R2RESET_+IN200msDelayfunctionalblockdiagram—fixed-voltageversion(foreachLDO)200msDelay_+Vref=1.1834VOUTFB/NCENGNDRESET_+INExternaltothedeviceR1R2TPS767D301,TPS767D318,TPS767D325DUAL-OUTPUTLOW-DROPOUTVOLTAGEREGULATORSSLVS209B–JULY1999–REVISEDAPRIL20004POSTOFFICEBOX655303•DALLAS,TEXAS75265TerminalFunctionsTERMINALI/ODESCRIPTIONNAMENO.I/ODESCRIPTION1GND3Regulator#1ground1EN4IRegulator#1enable1IN5,6IRegulator#1inputsupplyvoltage2GND9Regulator#2ground2EN10IRegulator#2enable2IN11,12IRegulator#2inputsupplyvoltage2OUT17,18ORegulator#2outputvoltage2RESET22ORegulator#2resetsignal1OUT23,24ORegulator#1outputvoltage1FB/NC25IRegulator#1outputvoltagefeedbackforadjustableandnoconnectforfixedoutput1RESET28ORegulator#1resetsignalNC1,2,7,8,13–16,19,20,21,26,27Noconnectiontimingdiagram†VresistheminimuminputvoltageforavalidRESET.ThesymbolVresisnotcurrentlylistedwithinEIAorJEDECstandardsforsemiconductorsymbology.ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎVIVres†VrestttVOThresholdVoltageRESETOutput200msDelay200msDelayOutputUndefinedOutputUndefinedVIT+‡VIT–VIT–VIT+‡Lessthan5%oftheoutputvoltage‡VIT–Trip