Texas Instruments LP2957A Bruksanvisning
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LP2957,LP2957A
www.ti.com
SNVS102C–JUNE1998–REVISEDAPRIL2013
LP2957/LP2957A5VLow-DropoutRegulatorforµPApplications
CheckforSamples:LP2957,LP2957A
1
FEATURES
DESCRIPTION
TheLP2957isa5Vmicropowervoltageregulator
2
•5VOutputwithin1.4%OverTemperature(A
withelectronicshutdown,errorflag,verylow
Grade)
quiescentcurrent(150µAtypicalat1mAload),and
•EasilyProgrammedforSnap-On/Snap-Off
verylowdropoutvoltage(470mVtypicalat250mA
Output
loadcurrent).
•Ensured250mAOutputCurrent
Outputcanbewiredforsnap-on/snap-offoperationto
•ExtremelyLowQuiescentCurrent
eliminatetransitionvoltagestateswhereµPoperation
maybeunpredictable.
•LowInput-OutputVoltageRequiredfor
Regulation
Outputcrowbar(50mAtypicalpull-downcurrent)will
•ReverseBatteryProtection
bringdowntheoutputquicklywhentheregulator
snapsofforwhentheshutdownfunctionisactivated.
•ExtremelyTightLineandLoadRegulation
Theparthastightlineandloadregulation(0.04%
•VeryLowTemperatureCoefficient
typical)andlowoutputtemperaturecoefficient(20
•CurrentandThermalLimiting
ppm/°Ctypical).
•ErrorFlagSignalswhenOutputisoutof
Theaccuracyofthe5Voutputisensuredatroom
Regulation
temperatureandoverthefulloperatingtemperature
range.
APPLICATIONS
TheLP2957isavailableinthefive-leadTO-220and
•High-EfficiencyLinearRegulator
DDPAK/TO-263packages.
•Battery-PoweredRegulator
PackageOutline
TopViewTopView
Figure1.Bent,StaggeredLeadsFigure2.PlasticSurfaceMountPackage
5-LeadTO-220Package5-LeadDDPAK/TO-263Package
SeePackageNumberNDH0005DSeePackageNumberKTT0005B
SideView
Figure3.SeePackageNumberKTT0005B
Thesedeviceshavelimitedbuilt-inESDprotection.Theleadsshouldbeshortedtogetherorthedeviceplacedinconductivefoam
duringstorageorhandlingtopreventelectrostaticdamagetotheMOSgates.
1
Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsof
TexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
2Alltrademarksarethepropertyoftheirrespectiveowners.
PRODUCTIONDATAinformationiscurrentasofpublicationdate.
Copyright©1998–2013,TexasInstrumentsIncorporated
ProductsconformtospecificationsperthetermsoftheTexas
Instrumentsstandardwarranty.Productionprocessingdoesnot
necessarilyincludetestingofallparameters.
Produktspecifikationer
| Varumärke: | Texas Instruments |
| Kategori: | ej kategoriserat |
| Modell: | LP2957A |
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