Texas Instruments LP3874-ADJ Handleiding

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LP3874-ADJ

V

IN

V

OUT

ADJ

GND

C

IN

10 PF

C

OUT

10 PF

Tantalum

INPUT

OUTPUT

0.8A

R1*

R2*

C

FF

*

*

V

OUT

= 1.216 x (1+

R1

R2

)

SDSD

LP3874-ADJ

www.ti.com

SNVS246E–SEPTEMBER2003–REVISEDAPRIL2013

LP3874-ADJ0.8AFastUltraLowDropoutLinearRegulators

CheckforSamples:LP3874-ADJ

1

FEATURES

DESCRIPTION

TheLP3874-ADJfastultralow-dropoutlinear

2

•UltraLowDropoutVoltage

regulatorsoperatefroma+2.5Vto+7.0Vinput

•LowGroundPinCurrent

supply.Theseultralowdropoutlinearregulators

•LoadRegulationof0.04%

respondveryquicklytostepchangesinload,which

makesthemsuitableforlowvoltagemicroprocessor

•10nAQuiescentCurrentinShutdownMode

applications.TheLP3874-ADJisdevelopedona

•SpecifiedOutputCurrentof0.8ADC

CMOSprocesswhichallowslowquiescentcurrent

•AvailableinDDPAK/TO-263,TO-220andSOT-

operationindependentofoutputloadcurrent.This

223Packages

CMOSprocessalsoallowstheLP3874-ADJto

operateunderextremelylowdropoutconditions.

•MinimumOutputCapacitorRequirements

•Overtemperature/OvercurrentProtection

DropoutVoltage:Ultralowdropoutvoltage;typically

24mVat80mAloadcurrentand240mVat0.8Aload

•−40°Cto+125°CJunctionTemperatureRange

current.

APPLICATIONS

GroundPinCurrent:Typically6mAat0.8Aload

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