Texas Instruments LP3856 Bedienungsanleitung

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V

OUT

V

IN

GND

LP3856-1.8

C

OUT

*

10 PF

C

IN

*

INPUT

V

OUT

10 PF

SD

SD**

SENSE

1.8V, 3.0A

3.3V ± 10%

* TANTALUM OR

CERAMIC

V

OUT

V

IN

GND

LP3853-1.8

C

OUT

*

10 PF

C

IN

*

INPUT

V

OUT

10 PF

ERROR**

SD

SD**

ERROR

1.8V, 3.0A

3.3V ± 10%

* TANTALUM OR

CERAMIC

LP3853,LP3856

www.ti.com

SNVS173G–FEBRUARY2003–REVISEDAPRIL2013

LP3853/LP38563AFastResponseUltraLowDropoutLinearRegulators

CheckforSamples:LP3853,LP3856

1

FEATURES

DESCRIPTION

TheLP3853/LP3856seriesoffastultralow-dropout

2

•UltraLowDropoutVoltage

linearregulatorsoperatefroma+2.5Vto+7.0Vinput

•StablewithSelectedCeramicCapacitors

supply.Widerangeofpresetoutputvoltageoptions

•LowGroundPinCurrent

areavailable.Theseultralowdropoutlinear

regulatorsrespondveryquicklytostepchangesin

•LoadRegulationof0.08%

load,whichmakesthemsuitableforlowvoltage

•10nAQuiescentCurrentinShutdownMode

microprocessorapplications.TheLP3853/LP3856are

•EnsuredOutputCurrentof3ADC

developedonaCMOSprocesswhichallowslow

quiescentcurrentoperationindependentofoutput

•AvailableinTO-263andTO-220Packages

loadcurrent.ThisCMOSprocessalsoallowsthe

•OutputVoltageAccuracy±1.5%

LP3853/LP3856tooperateunderextremelylow

•ErrorFlagIndicatesOutputStatus

dropoutconditions.

•SenseOptionImprovesLoadRegulation

DropoutVoltage:Ultralowdropoutvoltage;typically

•Overtemperature/overcurrentProtection

39mVat300mAloadcurrentand390mVat3Aload

current.

•−40°Cto+125°CJunctionTemperatureRange

GroundPinCurrent:Typically4mAat3Aload

APPLICATIONS

current.

•MicroprocessorPowerSupplies

ShutdownMode:Typically10nAquiescentcurrent

•StablewithCeramicOutputCapacitors

whentheshutdownpinispulledlow.

•GTL,GTL+,BTL,andSSTLBusTerminators

ErrorFlag:Errorflaggoeslowwhentheoutput

voltagedrops10%belownominalvalue.

•PowerSuppliesforDSPs

•SCSITerminator

SENSE:Sensepinimprovesregulationatremote

loads.

•PostRegulators

•HighEfficiencyLinearRegulators

PrecisionOutputVoltage:Multipleoutputvoltage

optionsareavailablerangingfrom1.8Vto5.0Vwitha

•BatteryChargers

ensuredaccuracyof±1.5%atroomtemperature,and

•OtherBatteryPoweredApplications

±3.0%overallconditions(varyingline,load,and

temperature).

TypicalApplicationCircuits

**SDandERRORpinsmustbepulledhighthrougha10kΩpull-upresistor.ConnecttheERRORpintogroundifthis

functionisnotused.SeeApplicationHintsformoreinformation.

**SDpinmustbepulledhighthrougha10kΩpull-upresistor.SeeApplicationHintsformoreinformation.

1

Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsof

TexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.

2Alltrademarksarethepropertyoftheirrespectiveowners.

PRODUCTIONDATAinformationiscurrentasofpublicationdate.

Copyright©2003–2013,TexasInstrumentsIncorporated

ProductsconformtospecificationsperthetermsoftheTexas

Instrumentsstandardwarranty.Productionprocessingdoesnot

necessarilyincludetestingofallparameters.

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