Texas Instruments LP8340 Bruksanvisning

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V

IN

1.0µF

Ceramic

V

OUT

1.0µF

Ceramic

V

OUT

GND

V

OUT

Sense

(LLP only)

V

IN

LP8340

www.ti.com

SNVS221D–FEBRUARY2003–REVISEDAPRIL2013

LP8340LowDropout,LowI

Q

,1.0ACMOSLinearRegulator

CheckforSamples:LP8340

1

FEATURES

DESCRIPTION

TheLP8340low-dropoutCMOSlinearregulatoris

2

•±1.5%TypicalV

OUT

Tolerance

availablein5V,3.3V,2.5V,1.8Vandadjustable

•420mVTypicalDropout@1.0A(V

O

=5V)

outputversions.Packagedinthe6ldWSONpackage

•WideOperatingRange2.7Vto10V

and3ldPFM.TheLP8340candeliverupto1.0A

outputcurrent.

•Internal1.0APMOSOutputTransistor

•19µATypicalQuiescentCurrent

Typicaldropoutvoltageis420mVat1.0Aforthe5.0V

version,540mVat1.0Aforthe3.3Vversion,670mV

•ThermalOverloadLimiting

at1.0Aforthe2.5Vversionand680mVat800mAfor

•FoldbackCurrentLimiting

the1.8Vversion.

•ZenerTrimmedBandgapReference

TheLP8340includesazenertrimmedbandgap

•SpaceSavingWSONpackage

voltagereference,foldbackcurrentlimitingand

•TemperatureRange

thermaloverloadlimiting.

–LP8340C0°Cto125°C

TheLP8340featuresaPMOSoutputtransistorwhich

unlikePNPtypelowdropoutregulatorsrequiresno

–LP8340I−40°Cto125°C

basedrivecurrent.Thisallowsthedeviceground

currenttoremainlessthan50µAoveroperating

APPLICATIONS

temperature,supplyvoltageandirrespectiveofthe

•HardDiskDrives

loadcurrent.

•NotebookComputers

•BatteryPoweredElectronics

•PortableInstrumentation

TypicalApplications

Figure1.FixedV

OUT

1

Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsof

TexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.

2Alltrademarksarethepropertyoftheirrespectiveowners.

PRODUCTIONDATAinformationiscurrentasofpublicationdate.

Copyright©2003–2013,TexasInstrumentsIncorporated

ProductsconformtospecificationsperthetermsoftheTexas

Instrumentsstandardwarranty.Productionprocessingdoesnot

necessarilyincludetestingofallparameters.

Produktspecifikationer