Texas Instruments LP3856-ADJ Handleiding

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LP3856-ADJ

V

IN

V

OUT

ADJ

GND

*C

IN

*C

OUT

INPUT

OUTPUT

3A

R1**

R2**

C

FF

**

**

V

OUT

= 1.216 x (1+

R1

R2

)

SDSD

10 PF

10 PF

* TANTALUM OR

CERAMIC

LP3856-ADJ

www.ti.com

SNVS243E–SEPTEMBER2003–REVISEDAPRIL2013

LP3856-ADJ3AFastResponseUltraLowDropoutLinearRegulators

CheckforSamples:LP3856-ADJ

1

FEATURES

DESCRIPTION

TheLP3856-ADJfastultralow-dropoutlinear

2

•UltraLowDropoutVoltage

regulatorsoperatefroma+2.5Vto+7.0Vinput

•StablewithSelectedCeramicCapacitors

supply.Theseultralowdropoutlinearregulators

•LowGroundPinCurrent

respondveryquicklytostepchangesinload,which

makesthemsuitableforlowvoltagemicroprocessor

•LoadRegulationof0.08%

applications.TheLP3856-ADJisdevelopedona

•10nAQuiescentCurrentinShutdownMode

CMOSprocesswhichallowslowquiescentcurrent

•SpecifiedOutputCurrentof3ADC

operationindependentofoutputloadcurrent.This

CMOSprocessalsoallowstheLP3856-ADJto

•AvailableinDDPAK/TO-263andTO-220

operateunderextremelylowdropoutconditions.

Packages

•Overtemperature/OvercurrentProtection

DropoutVoltage:Ultralowdropoutvoltage;typically

39mVat300mAloadcurrentand390mVat3Aload

•−40°Cto+125°CJunctionTemperatureRange

current.

APPLICATIONS

GroundPinCurrent:Typically4mAat3Aload

current.

•MicroprocessorPowerSupplies

ShutdownMode:Typically10nAquiescentcurrent

•GTL,GTL+,BTL,andSSTLBusTerminators

whentheshutdownpinispulledlow.

•PowerSuppliesforDSPs

AdjustableOutputVoltage:Theoutputvoltagemay

•SCSITerminator

beprogrammedviatwoexternalresistors.

•PostRegulators

•HighEfficiencyLinearRegulators

•BatteryChargers

•OtherBatteryPoweredApplications

TYPICALAPPLICATIONCIRCUIT

**SeeApplicationHints

1

Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsof

TexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.

2Alltrademarksarethepropertyoftheirrespectiveowners.

PRODUCTIONDATAinformationiscurrentasofpublicationdate.

Copyright©2003–2013,TexasInstrumentsIncorporated

ProductsconformtospecificationsperthetermsoftheTexas

Instrumentsstandardwarranty.Productionprocessingdoesnot

necessarilyincludetestingofallparameters.

Product specificaties