Texas Instruments LP3893 Handleiding
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LP3893
www.ti.com
SNVS237B–SEPTEMBER2003–REVISEDAPRIL2013
LP38933AFast-ResponseUltraLowDropoutLinearRegulators
CheckforSamples:LP3893
1
FEATURES
DESCRIPTION
TheLP3893isahigh-current,fast-responseregulator
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•UltraLowDropoutVoltage(270mVat3Atyp)
whichcanmaintainoutputvoltageregulationwith
•LowGroundPinCurrent
minimuminputtooutputvoltagedrop.Fabricatedon
•LoadRegulationof0.04%/A
aCMOSprocess,thedeviceoperatesfromtwoinput
voltages:Vbiasprovidesvoltagetodrivethegateof
•60nATypicalQuiescentCurrentinShutdown
theN-MOSpowertransistor,whileVinistheinput
•1.5%OutputAccuracy(25°C)
voltagewhichsuppliespowertotheload.Theuseof
•TO-220,DDPAK/TO-263Packages
anexternalbiasrailallowstheparttooperatefrom
ultralowVinvoltages.Unlikebipolarregulators,the
•OverTemperature/OverCurrentProtection
CMOSarchitectureconsumesextremelylow
•−40°Cto+125°CJunctionTemperatureRange
quiescentcurrentatanyoutputloadcurrent.Theuse
ofanN-MOSpowertransistorresultsinwide
APPLICATIONS
bandwidth,yetminimumexternalcapacitanceis
requiredtomaintainloopstability.
•DSPPowerSupplies
•ServerCoreandI/OSupplies
Thefasttransientresponseofthesedevicesmakes
themsuitableforuseinpoweringDSP,
•LinearPowerSuppliesforPCAdd-in-Cards
MicrocontrollerCorevoltagesandSwitchMode
•Set-TopBoxPowerSupplies
PowerSupplypostregulators.Thepartsareavailable
•MicroprocessorPowerSupplies
inTO-220andDDPAK/TO-263packages.
•HighEfficiencyLinearPowerSupplies
DropoutVoltage:270mV(typ)at3Aloadcurrent.
•SMPSPost-Regulators
GroundPinCurrent:3mA(typ)atfullload.
ShutdownCurrent:60nA(typ)whenS/Dpinislow.
PrecisionOutputVoltage:1.5%roomtemperature
accuracy.
TYPICALAPPLICATIONCIRCUIT
Atleast10µFofinputandoutputcapacitanceisrequiredforstability.
*Tantalumcapacitorsarerecommended.Aluminumelectrolyticcapacitorsmaybeusedforrestrictedtemperature
range.Seeapplicationhints.
CONNECTIONDIAGRAM
Figure1.TO-220,TopViewFigure2.DDPAK/TO-263,TopView
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Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsof
TexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
2Alltrademarksarethepropertyoftheirrespectiveowners.
PRODUCTIONDATAinformationiscurrentasofpublicationdate.
Copyright©2003–2013,TexasInstrumentsIncorporated
ProductsconformtospecificationsperthetermsoftheTexas
Instrumentsstandardwarranty.Productionprocessingdoesnot
necessarilyincludetestingofallparameters.
Product specificaties
| Merk: | Texas Instruments |
| Categorie: | Niet gecategoriseerd |
| Model: | LP3893 |
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