Texas Instruments LP3963 Handleiding

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LP3963,LP3966

www.ti.com

SNVS067H–APRIL2000–REVISEDAPRIL2013

LP3963/LP39663AFastUltraLowDropoutLinearRegulators

CheckforSamples:LP3963,LP3966

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FEATURES

DESCRIPTION

TheLP3963/LP3966seriesoffastultralow-dropout

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•UltraLowDropoutVoltage

linearregulatorsoperatefroma+2.5Vto+7.0Vinput

•LowGroundPinCurrent

supply.Widerangeofpresetoutputvoltageoptions

•LoadRegulationof0.06%

areavailable.Theseultralowdropoutlinear

regulatorsrespondveryquicklytostepchangesin

•15µAQuiescentCurrentinShutdownMode

loadwhichmakesthemsuitableforlowvoltage

•SpecifiedOutputCurrentof3ADC

microprocessorapplications.TheLP3963/LP3966are

•AvailableinDDPAK/TO-263andTO-220

developedonaCMOSprocesswhichallowslow

Packages

quiescentcurrentoperationindependentofoutput

loadcurrent.ThisCMOSprocessalsoallowsthe

•OutputVoltageAccuracy±1.5%

LP3963/LP3966tooperateunderextremelylow

•ErrorFlagIndicatesOutputStatus(LP3963)

dropoutconditions.

•SenseOptionImprovesLoadRegulation

DropoutVoltage:Ultralowdropoutvoltage;typically

(LP3966)

80mVat300mAloadcurrentand800mVat3Aload

•MinimumOutputCapacitorRequirements

current.

•Overtemperature/OvercurrentProtection

GroundPinCurrent:Typically6mAat3Aload

•−40°Cto+125°CJunctionTemperatureRange

current.

ShutdownMode:Typically15µAquiescentcurrent

APPLICATIONS

whentheshutdownpinispulledlow.

•MicroprocessorPowerSupplies

ErrorFlag:Errorflaggoeslowwhentheoutput

•GTL,GTL+,BTL,andSSTLBusTerminators

voltagedrops10%belownominalvalue(forLP3963).

•PowerSuppliesforDSPs

SENSE:Sensepinimprovesregulationatremote

•SCSITerminator

loads.(ForLP3966)

•PostRegulators

PrecisionOutputVoltage:Multipleoutputvoltage

•HighEfficiencyLinearRegulators

optionsareavailablerangingfrom1.2Vto5.0Vand

adjustable(LP3966),withaspecifiedaccuracyof

•BatteryChargers

±1.5%atroomtemperature,and±3.0%overall

•OtherBatteryPoweredApplications

conditions(varyingline,load,andtemperature).

TypicalApplicationCircuits

*SDandERRORpinsmustbepulledhighthrougha10kΩpull-upresistor.ConnecttheERRORpintogroundifthis

functionisnotused.SeeApplicationHintsformoreinformation.

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Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsof

TexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.

2Alltrademarksarethepropertyoftheirrespectiveowners.

PRODUCTIONDATAinformationiscurrentasofpublicationdate.

Copyright©2000–2013,TexasInstrumentsIncorporated

ProductsconformtospecificationsperthetermsoftheTexas

Instrumentsstandardwarranty.Productionprocessingdoesnot

necessarilyincludetestingofallparameters.

Product specificaties