Texas Instruments LP3871 Bedienungsanleitung

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LP3871

,

LP3874

SNVS225H–FEBRUARY2003–REVISEDJUNE2015

LP387x0.8-AFastUltra-Low-DropoutLinearRegulators

1Features3Description

TheLP3871andLP3874seriesoffastultra-low-

1

•InputVoltage:2.5Vto7V

dropoutlinearregulatorsoperatefroma2.5-Vto7-V

•Ultra-Low-DropoutVoltage

inputsupply.Widerangeofpresetoutputvoltage

•LowGroundPinCurrent

optionsareavailable.Theseultra-low-dropoutlinear

regulatorsrespondveryquicklytostepchangesin

•LoadRegulationof0.04%

load,whichmakesthemsuitableforlowvoltage

•10-nAQuiescentCurrentinShutdownMode

microprocessorapplications.Thedevicesare

•SpecifiedOutputCurrentof0.8-ADC

developedonaCMOSprocesswhichallowslow

quiescentcurrentoperationindependentofoutput

•OutputVoltageAccuracy±1.5%

loadcurrent.ThisCMOSprocessalsoallowsthe

•ERRORFlagIndicatesOutputStatus

LP3871andLP3874tooperateunderextremelylow

•SENSEOptionImprovesLoadRegulation

dropoutconditions.

•MinimumOutputCapacitorRequirements

DropoutVoltage:Ultra-low-dropoutvoltage;typically

•Overtemperature/OvercurrentProtection

24mVat80-mAloadcurrentand240mVat0.8-A

•−40°Cto+125°CJunctionTemperatureRange

loadcurrent.

GroundPinCurrent:Typically6mAat0.8-Aload

2Applications

current.

•MicroprocessorPowerSupplies

ShutdownMode:Typically10-nAquiescentcurrent

•GTL,GTL+,BTL,andSSTLBusTerminators

whentheSDpinispulledlow.

•PowerSuppliesforDSPs

ERRORFlag:ERRORflaggoeslowwhentheoutput

•SCSITerminator

voltagedrops10%belownominalvalue.

•PostRegulators

SENSE:SENSEpinimprovesregulationatremote

•High-EfficiencyLinearRegulators

loads.

•BatteryChargers

PrecisionOutputVoltage:Multipleoutputvoltage

•OtherBattery-PoweredApplications

optionsareavailablerangingfrom1.8Vto5Vwitha

ensuredaccuracyof±1.5%atroomtemperature,and

±3%overallconditions(varyingline,load,and

temperature).

DeviceInformation

(1)

PARTNUMBERPACKAGEBODYSIZE(NOM)

SOT-223(5)6.50mmx3.56mm

LP3871

LP3874

DDPAK/TO-263(5)10.16mmx8.42mm

(1)Forallavailablepackages,seetheorderableaddendumat

theendofthedatasheet.

TypicalApplications

*SDmustbepulledhighthrougha10-kΩ

pullupresistor.SeeApplicationand

*SDandERRORpinsmustbepulledhigh

Implementationformoreinformation.

througha10-kΩpullupresistor.Connect

theERRORpintogroundifthisfunctionis

notused.SeeApplicationand

Implementationformoreinformation.

1

AnIMPORTANTNOTICEattheendofthisdatasheetaddressesavailability,warranty,changes,useinsafety-criticalapplications,

intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.

Produktspezifikationen