LM1117/LM1117I
800mALow-DropoutLinearRegulator
GeneralDescription
TheLM1117isaseriesoflowdrop__outvoltageregulators
withadrop__outof1.2Vat800mAofloadcurrent.Ithasthe
samepin-outasNationalSemiconductor’sindustrystandard
LM317.
TheLM1117isavailableinanadjustableversion,whichcan
settheoutputvoltagefrom__1.25Vto13.8Vwithonlytwo
externalresistors.Inaddition,itisalsoavailableinfivefixed
voltages,1.8V,2.5V,2.85V,3.3V,and5V.
TheLM1117offerscurrentlimitingandthermalshutdown.Its
circuitincludesazenertrimmedbandgapreferencetoassure
outputvoltageaccuracytowithin±1％.
TheLM1117seriesisavailableinLLP,TO-263,SOT-223,
TO-220,andTO-252D-PAKpackages.Aminimumof10μF
tantalumcapacitorisrequiredattheoutputtoimprovethe
transientresponseandstability.
Features
nAvailablein1.8V,2.5V,2.85V,3.3V,5V,andAdjustable
Versions
nSpaceSavingSOT-223andLLPPackages
nCurrentLimitingandThermalProtection
nOutputCurrent800mA
nLineRegulation0.2％(Max)
nLoadRegulation0.4％(Max)
nTemperatureRange
—LM11170°Cto125°C
—LM1117I?40°Cto125°C
Applications
n2.85VModelforSCSI-2ActiveTermination
nPostRegulatorforSwitchingDC/DCConverter
nHighEfficiencyLinearRegulators
nBatteryCharger
nBatteryPoweredInstrumentation
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