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LP4950C-5V,LP4951C

www.ti.com

SNVS208C–SEPTEMBER2002–REVISEDAPRIL2013

LP4950C-5VandLP4951CAdjustableMicropowerVoltageRegulators

CheckforSamples:LP4950C-5V,LP4951C

1

FEATURES

DESCRIPTION

TheLP4950CandLP4951Caremicropowervoltage

2

•HighAccuracy5VSpecified100mAOutput

regulatorswithverylowquiescentcurrent(75μAtyp.)

•ExtremelyLowQuiescentCurrent

andverylowdropoutvoltage(typ.40mVatlightloads

•LowDropoutVoltage

and380mVat100mA).Theyareideallysuitedfor

useinbattery-poweredsystems.Furthermore,the

•ExtremelyTightLoadandLineRegulation

quiescentcurrentoftheLP4950C/LP4951C

•VeryLowTemperatureCoefficient

increasesonlyslightlyindropout,prolongingbattery

•UseasRegulatororReference

life.

•NeedsOnly1μFforStability

TheLP4950Cinthepopular3-pinTO-92packageis

•CurrentandThermalLimiting

pincompatiblewitholder5Vregulators.The8-lead

.

LP4951Cisavailableinaplasticsurfacemount

packageandoffersadditionalsystemfunctions.

LP4951CVERSIONSONLY

Onesuchfeatureisanerrorflagoutputwhichwarns

ofalowoutputvoltage,oftenduetofallingbatteries

•ErrorFlagWarnsofOutputDropout

ontheinput.Itmaybeusedforapower-onreset.A

•Logic-controlledElectronicShutdown

secondfeatureisthelogic-compatibleshutdowninput

•OutputPogrammableFrom1.24to29V

whichenablestheregulatortobeswitchedonand

off.Also,thepartmaybepin-strappedfora5V

outputorprogrammedfrom1.24Vto29Vwithan

externalpairofresistors.

CarefuldesignoftheLP4950C/LP4951Chas

minimizedallcontributionstotheerrorbudget.This

includesatightinitialtolerance(.5%typ.),extremely

goodloadandlineregulation(.05%typ.)andavery

lowoutputvoltagetemperaturecoefficient,making

thepartusefulasalow-powervoltagereference.

BLOCKDIAGRAMANDTYPICALAPPLICATIONS

LP4950CLP4951C

Figure1.

Figure2.

1

Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsof

TexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.

2Alltrademarksarethepropertyoftheirrespectiveowners.

PRODUCTIONDATAinformationiscurrentasofpublicationdate.

Copyright©2002–2013,TexasInstrumentsIncorporated

ProductsconformtospecificationsperthetermsoftheTexas

Instrumentsstandardwarranty.Productionprocessingdoesnot

necessarilyincludetestingofallparameters.

Produktspecifikationer