Texas Instruments LP38851 Bruksanvisning
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LP38851
www.ti.com
SNVS492C–JUNE2007–REVISEDAPRIL2013
LP38851800mAFast-ResponseHigh-AccuracyAdjustableLDOLinearRegulatorwith
EnableandSoft-Start
CheckforSamples:LP38851
1
FEATURES
DESCRIPTION
TheLP38851-ADJisahighcurrent,fastresponse
2
•AdjustableV
OUT
Rangeof0.80Vto1.8V
regulatorwhichcanmaintainoutputvoltage
•WideV
BIAS
SupplyOperatingRangeof3.0Vto
regulationwithextremelylowinputtooutputvoltage
5.5V
drop.FabricatedonaCMOSprocess,thedevice
•Stablewith10µFCeramicCapacitors
operatesfromtwoinputvoltages:V
BIAS
provides
voltagetodrivethegateoftheN-MOSpower
•DropoutVoltageof115mV(Typical)at800mA
transistor,whileV
IN
istheinputvoltagewhich
LoadCurrent
suppliespowertotheload.Theuseofanexternal
•PrecisionV
ADJ
acrossAllLineandLoad
biasrailallowstheparttooperatefromultralowV
IN
Conditions:
voltages.Unlikebipolarregulators,theCMOS
architectureconsumesextremelylowquiescent
–±1.5%V
ADJ
forT
J
=25°C
currentatanyoutputloadcurrent.TheuseofanN-
–±2.0%V
ADJ
for0°C≤T
J
≤+125°C
MOSpowertransistorresultsinwidebandwidth,yet
–±3.0%V
ADJ
for-40°C≤T
J
≤+125°C
minimumexternalcapacitanceisrequiredtomaintain
•Over-TemperatureandOver-Currentloopstability.
Protection
Thefasttransientresponseofthisdevicemakesit
•Availablein8-LeadSOPowerPad,
suitableforuseinpoweringDSP,Microcontroller
7-LeadSFMand7-LeadPFMPackages
CorevoltagesandSwitchModePowerSupplypost
regulators.ThepartisavailableinPSOP8–pin,SFM
•−40°Cto+125°COperatingJunction
7–pin,andTO-2637-pinpackages.
TemperatureRange
•DropoutVoltage:115mV(typical)at800mA
loadcurrent
APPLICATIONS
•LowGroundPinCurrent:10mA(typical)at800
•ASICPowerSuppliesin:
mAloadcurrent
–Desktops,Notebooks,andGraphicsCards,
•Soft-Start:ProgrammableSoft-Starttime
Servers
•PrecisionADJVoltage:±1.5%forT
J
=25°C,
–GamingSetTopBoxes,Printersand
and±2.0%for0°C≤T
J
≤+125°C,acrossallline
Copiers
andloadconditions
•ServerCoreandI/OSupplies
•DSPandFPGAPowerSupplies
•SMPSPost-Regulator
1
Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsof
TexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
2Alltrademarksarethepropertyoftheirrespectiveowners.
PRODUCTIONDATAinformationiscurrentasofpublicationdate.
Copyright©2007–2013,TexasInstrumentsIncorporated
ProductsconformtospecificationsperthetermsoftheTexas
Instrumentsstandardwarranty.Productionprocessingdoesnot
necessarilyincludetestingofallparameters.
Produktspecifikationer
| Varumärke: | Texas Instruments |
| Kategori: | ej kategoriserat |
| Modell: | LP38851 |
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