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LP3962,LP3965

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SNVS066H–MAY2000–REVISEDAPRIL2013

LP3962/LP39651.5AFastUltraLowDropoutLinearRegulators

CheckforSamples:LP3962,LP3965

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FEATURES

DESCRIPTION

TheLP3962/LP3965seriesoffastultralow-dropout

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•UltraLowDropoutVoltage

linearregulatorsoperatefroma+2.5Vto+7.0Vinput

•LowGroundPinCurrent

supply.Widerangeofpresetoutputvoltageoptions

•LoadRegulationof0.04%

areavailable.Theseultralowdropoutlinear

regulatorsrespondveryfasttostepchangesinload

•15µAQuiescentCurrentinShutdownMode

whichmakesthemsuitableforlowvoltage

•SpecifiedOutputCurrentof1.5ADC

microprocessorapplications.TheLP3962/LP3965are

•AvailableinSOT-223,SFM/TO-263andTO-220

developedonaCMOSprocesswhichallowslow

Packages

quiescentcurrentoperationindependentofoutput

loadcurrent.ThisCMOSprocessalsoallowsthe

•OutputVoltageAccuracy±1.5%

LP3962/LP3965tooperateunderextremelylow

•ErrorFlagIndicatesOutputStatus(LP3962)

dropoutconditions.

•SenseOptionImprovesBetterLoad

DropoutVoltage:Ultralowdropoutvoltage;typically

Regulation(LP3965)

38mVat150mAloadcurrentand380mVat1.5Aload

•ExtremelyLowOutputCapacitor

current.

Requirements

GroundPinCurrent:Typically5mAat1.5Aload

•Overtemperature/OvercurrentProtection

current.

•−40°Cto+125°CJunctionTemperatureRange

ShutdownMode:Typically15µAquiescentcurrent

whentheshutdownpinispulledlow.

APPLICATIONS

ErrorFlag:Errorflaggoeslowwhentheoutput

•MicroprocessorPowerSupplies

voltagedrops10%belownominalvalue(forLP3962).

•GTL,GTL+,BTL,andSSTLBusTerminators

SENSE:Sensepinimprovesregulationatremote

•PowerSuppliesforDSPs

loads.(ForLP3965)

•SCSITerminator

PrecisionOutputVoltage:Multipleoutputvoltage

•PostRegulators

optionsareavailablerangingfrom1.2Vto5.0Vand

•HighEfficiencyLinearRegulators

adjustable(LP3965),withaspecifiedaccuracyof

±1.5%atroomtemperature,and±3.0%overall

•BatteryChargers

conditions(varyingline,load,andtemperature).

•OtherBatteryPoweredApplications

TypicalApplicationCircuits

*SDandERRORpinsmustbepulledhighthrougha10kΩpull-upresistor.ConnecttheERRORpintogroundifthis

functionisnotused.SeeApplicationHintssectionformoreinformation.

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Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsof

TexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.

2Alltrademarksarethepropertyoftheirrespectiveowners.

PRODUCTIONDATAinformationiscurrentasofpublicationdate.

Copyright©2000–2013,TexasInstrumentsIncorporated

ProductsconformtospecificationsperthetermsoftheTexas

Instrumentsstandardwarranty.Productionprocessingdoesnot

necessarilyincludetestingofallparameters.

Produktspecifikationer