Texas Instruments LP38841 Bruksanvisning
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OUT
S/D
0.1 PF
10 PF
Ceramic
OUT
S/D
GND
IN
BIAS
LP38841
IN
BIAS
5V ± 10%
GND
GND
4.7 PF*
LP38841
www.ti.com
SNVS289C–DECEMBER2004–REVISEDAPRIL2013
LP388410.8AUltraLowDropoutLinearRegulators
StablewithCeramicOutputCapacitors
CheckforSamples:LP38841
1
FEATURES
DESCRIPTION
TheLP38841isahighcurrent,fastresponse
2
•IdealforConversionfrom1.8Vor1.5VInputs
regulatorwhichcanmaintainoutputvoltage
•DesignedforUsewithlowESRCeramic
regulationwithminimuminputtooutputvoltagedrop.
Capacitors
FabricatedonaCMOSprocess,thedeviceoperates
•0.8V,1.2Vand1.5VStandardVoltages
fromtwoinputvoltages:Vbiasprovidesvoltageto
drivethegateoftheN-MOSpowertransistor,while
Available
Vinistheinputvoltagewhichsuppliespowertothe
•UltraLowDropoutVoltage(75mVat0.8Atyp)
load.Theuseofanexternalbiasrailallowsthepart
•1.5%InitialOutputAccuracy
tooperatefromultralowVinvoltages.Unlikebipolar
•LoadRegulationof0.1%/A(typical)
regulators,theCMOSarchitectureconsumes
extremelylowquiescentcurrentatanyoutputload
•30nAQuiescentCurrentinShutdown(typical)
current.TheuseofanN-MOSpowertransistor
•LowGroundPinCurrentatallLoads
resultsinwidebandwidth,yetminimumexternal
•OverTemperature/overCurrentProtection
capacitanceisrequiredtomaintainloopstability.
•Availablein5LeadTO-220andDDPAK/TO-263
Thefasttransientresponseofthesedevicesmakes
Packages
themsuitableforuseinpoweringDSP,
MicrocontrollerCorevoltagesandSwitchMode
•−40°Cto+125°CJunctionTemperatureRange
PowerSupplypostregulators.Thepartsareavailable
inTO-220andDDPAK/TO-263packages.
APPLICATIONS
DropoutVoltage:75mV(typ)at0.8Aloadcurrent.
•ASICPowerSuppliesIn:
–Desktops,Notebooks,andGraphicsCards,
QuiescentCurrent:30mA(typ)atfullload.
Servers
ShutdownCurrent:30nA(typ)whenS/Dpinislow.
–GamingSetTopBoxes,Printersand
PrecisionOutputVoltage:1.5%roomtemperature
Copiers
accuracy.
•ServerCoreandI/OSupplies
•DSPandFPGAPowerSupplies
•SMPSPost-Regulator
TYPICALAPPLICATIONCIRCUIT
*MinimumvaluerequiredifTantalumcapacitorisused(seeApplicationHints).
1
Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsof
TexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
2Alltrademarksarethepropertyoftheirrespectiveowners.
PRODUCTIONDATAinformationiscurrentasofpublicationdate.
Copyright©2004–2013,TexasInstrumentsIncorporated
ProductsconformtospecificationsperthetermsoftheTexas
Instrumentsstandardwarranty.Productionprocessingdoesnot
necessarilyincludetestingofallparameters.
Produktspecifikationer
| Varumärke: | Texas Instruments |
| Kategori: | ej kategoriserat |
| Modell: | LP38841 |
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