Texas Instruments LP3855 Handleiding

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OUT

GND

LP3855-2.5

C

OUT

*

10 PF

C

IN

*

INPUT

V

OUT

10 PF

SD

SD**

SENSE

2.5V, 1.5A

3.3V ± 10%

* TANTALUM OR CERAMIC

IN

OUTIN

GND

LP3852-2.5

C

OUT

*

10 PF

C

IN

*

INPUT

V

OUT

10 PF

ERROR**

SD

SD**

ERROR

2.5V, 1.5A

3.3V ± 10%

* TANTALUM OR CERAMIC

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LP3852

,

LP3855

SNVS174I–FEBRUARY2003–REVISEDFEBRUARY2015

LP385x1.5-AFastResponseUltra-LowDropoutLinearRegulators

1Features3Description

TheLP3852andLP3855seriesoffastultra-low

1

•InputSupplyVoltage:2.5Vto7V

dropoutlinearregulatorsoperatefroma2.5-Vto7-V

•Ultra-LowDropoutVoltage

inputsupply.Awiderangeofpresetoutputvoltage

•StablewithSelectedCeramicCapacitors

optionsareavailable.Theseultra-lowdropoutlinear

regulatorsrespondveryquicklytostepchangesin

•LowGround-PinCurrent

load,whichmakesthemsuitableforlowvoltage

•LoadRegulationof0.06%

microprocessorapplications.TheLP3852and

•10-nAQuiescentCurrentinShutdownMode

LP3855aredevelopedonaCMOSprocesswhich

allowslowquiescent-currentoperationindependent

•SpecifiedOutputCurrentof1.5ADC

ofoutputloadcurrent,typically4mAat1.5-Aload

•OutputVoltageAccuracy±1.5%

current.ThisCMOSprocessalsoallowstheLP3852

•ERRORPinIndicatesOutputStatus

andLP3855tooperateunderextremelylowdropout

•SENSEOptionImprovesLoadRegulation

conditions,typically24mVat150-mAloadcurrent

and240mVat1.5-Aloadcurrent.

•Overtemperature/OvercurrentProtection

•−40°Cto125°CJunctionTemperatureRange

TheLP3852hasanERRORpin;itgoeslowwhen

theoutputvoltagedrops10%belownominalvalue.

TheLP3855hasaSENSEpintoimprovesregulation

2Applications

atremoteloads.

•MicroprocessorPowerSupplies

TheLP3852andLP3855areavailablewithfixed

•GTL,GTL+,BTL,andSSTLBusTerminators

outputvoltagesfrom1.8Vto5Vwithaspecified

•PowerSuppliesforDSPs

accuracyof±1.5%atroomtemperature,and±3%

•SCSITerminator

overallconditions(varyingline,load,and

temperature).ContactTexasInstrumentsSalesfor

•PostRegulators

specificvoltageoptionneeds.

•HighEfficiencyLinearRegulators

•BatteryChargers

DeviceInformation

(1)

•OtherBatteryPoweredApplications

PARTNUMBERPACKAGEBODYSIZE(NOM)

SOT(5)6.50mmx3.56mm

LP3852

TO-263(5)10.16mmx8.42mm

LP3855

TO-220(5)14.986mmx10.16mm

(1)Forallavailablepackages,seetheorderableaddendumat

theendofthedatasheet.

4SimplifiedSchematics

**SDandERRORpinsmustbepulledhighthrougha10-kΩpull-upresistor.ConnecttheERRORpintogroundifthis

functionisnotused.

**SDmustbepulledhighthrougha10-kΩpull-upresistor.

1

AnIMPORTANTNOTICEattheendofthisdatasheetaddressesavailability,warranty,changes,useinsafety-criticalapplications,

intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.

Product specificaties