Texas Instruments LP3873 Handleiding

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LP3873,LP3876

www.ti.com

SNVS220E–NOVEMBER2002–REVISEDAPRIL2013

LP3873/LP38763AFastUltraLowDropoutLinearRegulators

CheckforSamples:LP3873,LP3876

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FEATURES

DESCRIPTION

TheLP3873/LP3876seriesoffastultralow-dropout

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•UltraLowDropoutVoltage

linearregulatorsoperatefroma+2.5Vto+7.0Vinput

•LowGroundPinCurrent

supply.Widerangeofpresetoutputvoltageoptions

•LoadRegulationof0.08%

areavailable.Theseultralowdropoutlinear

regulatorsrespondveryquicklytostepchangesin

•1µAQuiescentCurrentinShutdownMode

load,whichmakesthemsuitableforlowvoltage

•EnsuredOutputCurrentof3ADC

microprocessorapplications.TheLP3873/LP3876are

•AvailableinDDPAK/TO-263andTO-220

developedonaCMOSprocesswhichallowslow

Packages

quiescentcurrentoperationindependentofoutput

loadcurrent.ThisCMOSprocessalsoallowsthe

•OutputVoltageAccuracy±1.5%

LP3873/LP3876tooperateunderextremelylow

•ErrorFlagIndicatesOutputStatus

dropoutconditions.

•SenseOptionImprovesLoadRegulation

DropoutVoltage:Ultralowdropoutvoltage;typically

•MinimumOutputCapacitorRequirements

80mVat300mAloadcurrentand800mVat3Aload

•Overtemperature/overcurrentProtection

current.

•−40°Cto+125°CJunctionTemperatureRange

GroundPinCurrent:Typically6mAat3Aload

current.

APPLICATIONS

ShutdownMode:Typically1µAquiescentcurrent

•MicroprocessorPowerSupplies

whentheshutdownpinispulledlow.

•GTL,GTL+,BTL,andSSTLBusTerminators

ErrorFlag:Errorflaggoeslowwhentheoutput

•PowerSuppliesforDSPs

voltagedrops10%belownominalvalue.

•SCSITerminator

SENSE:Sensepinimprovesregulationatremote

•PostRegulators

loads.

•HighEfficiencyLinearRegulators

PrecisionOutputVoltage:Multipleoutputvoltage

•BatteryChargers

optionsareavailablerangingfrom1.8Vto5.0Vwith

anensuredaccuracyof±1.5%atroomtemperature,

•OtherBatteryPoweredApplications

and±3.0%overallconditions(varyingline,load,and

temperature).

TypicalApplicationCircuits

*SDandERRORpinsmustbepulledhighthrougha10kΩpull-upresistor.ConnecttheERRORpintogroundifthis

functionisnotused.SeeApplicationHintsformoreinformation.

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Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsof

TexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.

2Alltrademarksarethepropertyoftheirrespectiveowners.

PRODUCTIONDATAinformationiscurrentasofpublicationdate.

Copyright©2002–2013,TexasInstrumentsIncorporated

ProductsconformtospecificationsperthetermsoftheTexas

Instrumentsstandardwarranty.Productionprocessingdoesnot

necessarilyincludetestingofallparameters.

Product specificaties