Texas Instruments LP38851 Bruksanvisning

Läs gratis den bruksanvisning för Texas Instruments LP38851 (35 sidor) i kategorin ej kategoriserat. Guiden har ansetts hjälpsam av 14 personer. Har du en fråga om Texas Instruments LP38851 eller vill du ställa frågor till andra användare av produkten? Ställ en fråga

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