Texas Instruments LP3876 Bruksanvisning
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LP3873,LP3876
www.ti.com
SNVS220E–NOVEMBER2002–REVISEDAPRIL2013
LP3873/LP38763AFastUltraLowDropoutLinearRegulators
CheckforSamples:LP3873,LP3876
1
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.
1
Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsof
TexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
2Alltrademarksarethepropertyoftheirrespectiveowners.
PRODUCTIONDATAinformationiscurrentasofpublicationdate.
Copyright©2002–2013,TexasInstrumentsIncorporated
ProductsconformtospecificationsperthetermsoftheTexas
Instrumentsstandardwarranty.Productionprocessingdoesnot
necessarilyincludetestingofallparameters.
Produktspecifikationer
| Varumärke: | Texas Instruments |
| Kategori: | ej kategoriserat |
| Modell: | LP3876 |
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