1117-_datasheet线性电源LDO

LM1117/LM1117I

800mALow-DropoutLinearRegulator

GeneralDescription

TheLM1117isaseriesoflowdropoutvoltageregulatorswithadropoutof1.2Vat800mAofloadcurrent.Ithasthesamepin-outasNationalSemiconductor’sindustrystandardLM317.

TheLM1117isavailableinanadjustableversion,whichcansettheoutputvoltagefrom1.25Vto13.8Vwithonlytwoexternalresistors.Inaddition,itisalsoavailableinfivefixedvoltages,1.8V,2.5V,2.85V,3.3V,and5V.

TheLM1117offerscurrentlimitingandthermalshutdown.Itscircuitincludesazenertrimmedbandgapreferencetoas-sureoutputvoltageaccuracytowithin±1%.

TheLM1117seriesisavailableinLLP,TO-263,SOT-223,TO-220,andTO-252D-PAKpackages.Aminimumof10µFtantalumcapacitorisrequiredattheoutputtoimprovethetransientresponseandstability.

Features

nAvailablein1.8V,2.5V,2.85V,3.3V,5V,andAdjustableVersions

nSpaceSavingSOT-223andLLPPackagesnCurrentLimitingandThermalProtectionnOutputCurrent800mAnLineRegulation0.2%(Max)nLoadRegulation0.4%(Max)nTemperatureRange—LM11170˚Cto125˚C—LM1117I−40˚Cto125˚C

Applications

nnnnn

2.85VModelforSCSI-2ActiveTerminationPostRegulatorforSwitchingDC/DCConverterHighEfficiencyLinearRegulatorsBatteryCharger

BatteryPoweredInstrumentation

TypicalApplication

ActiveTerminatorforSCSI-2Bus

10091905

FixedOutputRegulator

10091928

©2004NationalSemiconductorCorporationDS100919www.national.com

LM1117/LM1117IOrderingInformation

Package3-leadSOT-223

Temperature

Range0˚Cto+125˚C

PartNumberLM1117MPX-ADJLM1117MPX-1.8LM1117MPX-2.5LM1117MPX-2.85LM1117MPX-3.3LM1117MPX-5.0

−40˚Cto+125˚C

LM1117IMPX-ADJLM1117IMPX-3.3LM1117IMPX-5.0

3-leadTO-220

0˚Cto+125˚C

LM1117T-ADJLM1117T-1.8LM1117T-2.5LM1117T-2.85LM1117T-3.3LM1117T-5.0

3-leadTO-252

0˚Cto+125˚C

LM1117DTX-ADJLM1117DTX-1.8LM1117DTX-2.5LM1117DTX-2.85LM1117DTX-3.3LM1117DTX-5.0

−40˚Cto+125˚C

LM1117IDTX-ADJLM1117IDTX-3.3LM1117IDTX-5.0

8-leadLLP

0˚Cto+125˚C

LM1117LDX-ADJLM1117LDX-1.8LM1117LDX-2.5LM1117LDX-2.85LM1117LDX-3.3LM1117LDX-5.0

−40˚Cto125˚C

LM1117ILDX-ADJLM1117ILDX-3.3LM1117ILDX-5.0

TO-263

0˚Cto+125˚C

LM1117SX-ADJLM1117SX-2.85LM1117SX-3.3LM1117SX-5.0

PackagingMarking

N03AN12AN13AN04AN05AN06AN03BN05BN06BLM1117T-ADJLM1117T-1.8LM1117T-2.5LM1117T-2.85LM1117T-3.3LM1117T-5.0LM1117DT-ADJLM1117DT-1.8LM1117DT-2.5LM1117DT-2.85LM1117DT-3.3LM1117DT-5.0LM1117IDT-ADJLM1117IDT-3.3LM1117IDT-5.01117ADJ1117-181117-251117-281117-331117-501117IAD1117I331117I50LM1117SADJLM1117S2.85LM1117S3.3LM1117S5.0

TransportMediaTapeandReelTapeandReelTapeandReelTapeandReelTapeandReelTapeandReelTapeandReelTapeandReelTapeandReel

RailsRailsRailsRailsRailsRailsTapeandReelTapeandReelTapeandReelTapeandReelTapeandReelTapeandReelTapeandReelTapeandReelTapeandReelTapeandReelTapeandReelTapeandReelTapeandReelTapeandReelTapeandReelTapeandReelTapeandReelTapeandReelTapeandReelTapeandReelTapeandReelTapeandReel

TS3BLDC08ATD03BT03BNSCDrawingMP04A

www.national.com2

LM1117/LM1117IBlockDiagram

10091901

ConnectionDiagrams

SOT-223

TO-263

10091944

TopView

10091904

TopView

10091945

TO-220

SideViewLLP

10091902

TopViewTO-252

10091946

WhenusingtheLLPpackage

Pins2,3&4mustbeconnectedtogetherandPins5,6&7mustbeconnectedtogether

TopView

10091938

TopView

3www.national.com

LM1117/LM1117IAbsoluteMaximumRatings(Note1)

IfMilitary/Aerospacespecifieddevicesarerequired,pleasecontacttheNationalSemiconductorSalesOffice/Distributorsforavailabilityandspecifications.MaximumInputVoltage(VINtoGND)PowerDissipation(Note2)JunctionTemperature(TJ)(Note2)

StorageTemperatureRangeLeadTemperature

20V

InternallyLimited

150˚C

-65˚Cto150˚C

TO-220(T)PackageSOT-223(IMP)PackageESDTolerance(Note3)

260˚C,10sec260˚C,4sec

2000V

OperatingRatings(Note1)

InputVoltage(VINtoGND)

JunctionTemperatureRange(TJ)(Note2)LM1117LM1117I

0˚Cto125˚C−40˚Cto125˚C

15V

LM1117ElectricalCharacteristics

TypicalsandlimitsappearinginnormaltypeapplyforTJ=25˚C.LimitsappearinginBoldfacetypeapplyovertheentirejunc-tiontemperaturerangeforoperation,0˚Cto125˚C.SymbolVREFParameterReferenceVoltage

Conditions

LM1117-ADJ

IOUT=10mA,VIN-VOUT=2V,TJ=25˚C10mA≤IOUT≤800mA,1.4V≤VIN-VOUT≤10V

LM1117-1.8

IOUT=10mA,VIN=3.8V,TJ=25˚C0≤IOUT≤800mA,3.2V≤VIN≤10VLM1117-2.5

IOUT=10mA,VIN=4.5V,TJ=25˚C0≤IOUT≤800mA,3.9V≤VIN≤10VLM1117-2.85

IOUT=10mA,VIN=4.85V,TJ=25˚C0≤IOUT≤800mA,4.25V≤VIN≤10V0≤IOUT≤500mA,VIN=4.10VLM1117-3.3

IOUT=10mA,VIN=5VTJ=25˚C0≤IOUT≤800mA,4.75V≤VIN≤10VLM1117-5.0

IOUT=10mA,VIN=7V,TJ=25˚C0≤IOUT≤800mA,6.5V≤VIN≤12V

∆VOUTLineRegulation(Note6)

LM1117-ADJ

IOUT=10mA,1.5V≤VIN-VOUT≤13.75VLM1117-1.8

IOUT=0mA,3.2V≤VIN≤10VLM1117-2.5

IOUT=0mA,3.9V≤VIN≤10VLM1117-2.85

IOUT=0mA,4.25V≤VIN≤10VLM1117-3.3

IOUT=0mA,4.75V≤VIN≤15VLM1117-5.0

IOUT=0mA,6.5V≤VIN≤15V

Min(Note5)1.2381.225

Typ(Note4)1.2501.250

Max(Note5)1.2621.270

Units

VV

VOUTOutputVoltage

1.7821.7462.4752.4502.8202.7902.7903.2673.23.9504.900

1.8001.8002.5002.5002.8502.8502.8503.3003.3005.0005.0000.03511

1.8181.82.5252.5502.8802.9102.9103.3333.3655.0505.1000.266

VVVVVVVVVVV%mVmV

111

6610

mVmVmV

www.national.com4

LM1117/LM1117ILM1117ElectricalCharacteristics

Symbol∆VOUTParameterLoadRegulation(Note6)

(Continued)

TypicalsandlimitsappearinginnormaltypeapplyforTJ=25˚C.LimitsappearinginBoldfacetypeapplyovertheentirejunc-tiontemperaturerangeforoperation,0˚Cto125˚C.

Conditions

LM1117-ADJ

VIN-VOUT=3V,10≤IOUT≤800mALM1117-1.8

VIN=3.2V,0≤IOUT≤800mALM1117-2.5

VIN=3.9V,0≤IOUT≤800mALM1117-2.85

VIN=4.25V,0≤IOUT≤800mALM1117-3.3

VIN=4.75V,0≤IOUT≤800mALM1117-5.0

VIN=6.5V,0≤IOUT≤800mA

Min(Note5)

Typ(Note4)0.211

Max(Note5)0.41010

Units

%mVmV

1111.101.151.20

800

12001.755

1010151.201.251.30150051010

mVmVmVVVVmAmAmAmA

VIN-VOUTDropoutVoltage(Note7)CurrentLimitMinimumLoadCurrent(Note8)QuiescentCurrent

IOUT=100mAIOUT=500mAIOUT=800mA

VIN-VOUT=5V,TJ=25˚CLM1117-ADJVIN=15VLM1117-1.8VIN≤15VLM1117-2.5VIN≤15VLM1117-2.85VIN≤10VLM1117-3.3VIN≤15VLM1117-5.0VIN≤15V

ILIMIT5550.01

60

7560

1010100.1

mAmAmA%/WdB

ThermalRegulationRippleRegulationAdjustPinCurrentAdjustPinCurrentChange

TemperatureStabilityLongTermStabilityRMSOutputNoiseThermalResistanceJunction-to-CaseThermalResistanceJunction-to-Ambient(Noairflow)

TA=25˚C,30msPulse

fRIPPLE=120Hz,VIN-VOUT=3VVRIPPLE=1VPP10≤IOUT≤800mA,1.4V≤VIN-VOUT≤10VTA=125˚C,1000Hrs

(%ofVOUT),10Hz≤f≤10kHz3-LeadSOT-2233-LeadTO-2203-LeadTO-252

3-LeadSOT-223(Noheatsink)3-LeadTO-220(Noheatsink)3-LeadTO-252(Note9)(Noheatsink)3-LeadTO-2638-LeadLLP(Note10)

1205

µAµA%%%˚C/W˚C/W˚C/W˚C/W˚C/W˚C/W˚C/W˚C/W

0.20.50.30.00315.03.010136799250

5www.national.com

LM1117/LM1117ILM1117IElectricalCharacteristics

TypicalsandlimitsappearinginnormaltypeapplyforTJ=25˚C.LimitsappearinginBoldfacetypeapplyovertheentirejunc-tiontemperaturerangeforoperation,−40˚Cto125˚C.SymbolVREFParameterReferenceVoltage

Conditions

LM1117I-ADJ

IOUT=10mA,VIN-VOUT=2V,TJ=25˚C10mA≤IOUT≤800mA,1.4V≤VIN-VOUT≤10V

LM1117I-3.3

IOUT=10mA,VIN=5V,TJ=25˚C0≤IOUT≤800mA,4.75V≤VIN≤10VLM1117I-5.0

IOUT=10mA,VIN=7V,TJ=25˚C0≤IOUT≤800mA,6.5V≤VIN≤12V

∆VOUTLineRegulation(Note6)

LM1117I-ADJ

IOUT=10mA,1.5V≤VIN-VOUT≤13.75VLM1117I-3.3

IOUT=0mA,4.75V≤VIN≤15VLM1117I-5.0

IOUT=0mA,6.5V≤VIN≤15V

∆VOUTLoadRegulation(Note6)

LM1117I-ADJ

VIN-VOUT=3V,10≤IOUT≤800mALM1117I-3.3

VIN=4.75V,0≤IOUT≤800mALM1117I-5.0

VIN=6.5V,0≤IOUT≤800mA

VIN-VOUTDropoutVoltage(Note7)CurrentLimitMinimumLoadCurrent(Note8)QuiescentCurrent

IOUT=100mAIOUT=500mAIOUT=800mA

ILIMITVIN-VOUT=5V,TJ=25˚CLM1117I-ADJVIN=15VLM1117I-3.3VIN≤15VLM1117I-5.0VIN≤15V

ThermalRegulationRippleRegulationAdjustPinCurrentAdjustPinCurrentChange

TemperatureStabilityLongTermStabilityRMSOutputNoiseThermalResistanceJunction-to-CaseThermalResistanceJunction-to-AmbientNoairflow)

TA=125˚C,1000Hrs

(%ofVOUT),10Hz≤f≤10kHz3-LeadSOT-2233-LeadTO-252

3-LeadSOT-223(Noheatsink)3-LeadTO-252(Noheatsink)(Note9)8-LeadLLP(Note10)10≤IOUT≤800mA,1.4V≤VIN-VOUT≤10VTA=25˚C,30msPulse

fRIPPLE=120Hz,VIN-VOUT=3VVRIPPLE=1VPP60800Min(Note5)1.2381.200

Typ(Note4)1.2501.250

Max(Note5)1.2621.290

Units

VV

VOUTOutputVoltage

3.2673.1684.9504.800

3.3003.3005.0005.0000.035110.2111.101.151.2012001.7550.0175600.20.50.30.00315.0101369240

3.3333.4325.0505.2000.310150.515201.301.351.401500515150.1

VVVV%mVmV%mVmVVVVmAmAmAmA%/WdB

12010

µAµA%%%˚C/W˚C/W˚C/W˚C/W˚C/W

Note1:AbsoluteMaximumRatingsindicatelimitsbeyondwhichdamagetothedevicemayoccur.OperatingRatingsindicateconditionsforwhichthedeviceisintendedtobefunctional,butspecificperformanceisnotguaranteed.Forguaranteedspecificationsandthetestconditions,seetheElectricalCharacteristics.

www.national.com6

LM1117/LM1117INote2:ThemaximumpowerdissipationisafunctionofTJ(max),θJA,andTA.ThemaximumallowablepowerdissipationatanyambienttemperatureisPD=(TJ(max)–TA)/θJA.AllnumbersapplyforpackagessoldereddirectlyintoaPCboard.

Note3:Fortestingpurposes,ESDwasappliedusinghumanbodymodel,1.5kΩinserieswith100pF.Note4:TypicalValuesrepresentthemostlikelyparametricnorm.Note5:Alllimitsareguaranteedbytestingorstatisticalanalysis.

Note6:Loadandlineregulationaremeasuredatconstantjunctionroomtemperature.

Note7:Thedropoutvoltageistheinput/outputdifferentialatwhichthecircuitceasestoregulateagainstfurtherreductionininputvoltage.Itismeasuredwhentheoutputvoltagehasdropped100mVfromthenominalvalueobtainedatVIN=VOUT+1.5V.Note8:Theminimumoutputcurrentrequiredtomaintainregulation.Note9:Minimumpadsizeof0.038in2

Note10:ThermalPerformancefortheLLPwasobtainedusingJESD51-7boardwithsixviasandanambienttemperatureof22˚C.ForinformationaboutimprovedthermalperformanceandpowerdissipationfortheLLP,refertoApplicationNoteAN-1187.

TypicalPerformanceCharacteristics

DropoutVoltage(VIN-V

OUT)

Short-CircuitCurrent

1009192210091923

LoadRegulationLM1117-ADJRippleRejection

10091943

10091906

7www.national.com

LM1117/LM1117ITypicalPerformanceCharacteristics

LM1117-ADJRippleRejectionvs.Current

(Continued)

TemperatureStability

10091907

10091925

AdjustPinCurrentLM1117-2.85LoadTransientResponse

1009192610091908

LM1117-5.0LoadTransientResponseLM1117-2.85LineTransientResponse

1009190910091910

www.national.com8

LM1117/LM1117ITypicalPerformanceCharacteristics

LM1117-5.0LineTransientResponse

(Continued)

10091911

ApplicationNote

1.0ExternalCapacitors/Stability1.1InputBypassCapacitor

Aninputcapacitorisrecommended.A10µFtantalumontheinputisasuitableinputbypassingforalmostallapplications.1.2AdjustTerminalBypassCapacitor

Theadjustterminalcanbebypassedtogroundwithaby-passcapacitor(CADJ)toimproveripplerejection.Thisby-passcapacitorpreventsripplefrombeingamplifiedastheoutputvoltageisincreased.Atanyripplefrequency,theimpedanceoftheCADJshouldbelessthanR1topreventtheripplefrombeingamplified:1/(2π*fRIPPLE*CADJ)TheR1istheresistorbetweentheoutputandtheadjustpin.Itsvalueisnormallyintherangeof100-200Ω.Forexample,withR1=124ΩandfRIPPLE=120Hz,theCADJshouldbe>11µF.

1.3OutputCapacitor

Theoutputcapacitoriscriticalinmaintainingregulatorsta-bility,andmustmeettherequiredconditionsforbothmini-mumamountofcapacitanceandESR(EquivalentSeriesResistance).TheminimumoutputcapacitancerequiredbytheLM1117is10µF,ifatantalumcapacitorisused.Anyincreaseoftheoutputcapacitancewillmerelyimprovetheloopstabilityandtransientresponse.TheESRoftheoutputcapacitorshouldrangebetween0.3Ω-22Ω.Inthecaseoftheadjustableregulator,whentheCADJisused,alargeroutputcapacitance(22µftantalum)isrequired.2.0OutputVoltage

TheLM1117adjustableversiondevelopsa1.25Vreferencevoltage,VREF,betweentheoutputandtheadjustterminal.AsshowninFigure1,thisvoltageisappliedacrossresistorR1togenerateaconstantcurrentI1.ThecurrentIADJfromtheadjustterminalcouldintroduceerrortotheoutput.Butsinceitisverysmall(60µA)comparedwiththeI1andveryconstantwithlineandloadchanges,theerrorcanbeig-nored.TheconstantcurrentI1thenflowsthroughtheoutputsetresistorR2andsetstheoutputvoltagetothedesiredlevel.

Forfixedvoltagedevices,R1andR2areintegratedinsidethedevices.

9

10091917

FIGURE1.BasicAdjustableRegulator

3.0LoadRegulation

TheLM1117regulatesthevoltagethatappearsbetweenitsoutputandgroundpins,orbetweenitsoutputandadjustpins.Insomecases,lineresistancescanintroduceerrorstothevoltageacrosstheload.Toobtainthebestloadregula-tion,afewprecautionsareneeded.

Figure2,showsatypicalapplicationusingafixedoutputregulator.TheRt1andRt2arethelineresistances.ItisobviousthattheVLOADislessthantheVOUTbythesumofthevoltagedropsalongthelineresistances.Inthiscase,theloadregulationseenattheRLOADwouldbedegradedfromthedatasheetspecification.Toimprovethis,theloadshouldbetieddirectlytotheoutputterminalonthepositivesideanddirectlytiedtothegroundterminalonthenegativeside.

www.national.com

LM1117/LM1117IApplicationNote

(Continued)

Withanextremelylargeoutputcapacitor(≥1000µF),andwithinputinstantaneouslyshortedtoground,theregulatorcouldbedamaged.

Inthiscase,anexternaldiodeisrecommendedbetweentheoutputandinputpinstoprotecttheregulator,asshowninFigure4.

10091918

FIGURE2.TypicalApplicationusingFixedOutput

RegulatorWhentheadjustableregulatorisused(Figure3),thebestperformanceisobtainedwiththepositivesideoftheresistorR1tieddirectlytotheoutputterminaloftheregulatorratherthanneartheload.Thiseliminateslinedropsfromappearingeffectivelyinserieswiththereferenceanddegradingregu-lation.Forexample,a5Vregulatorwith0.05Ωresistancebetweentheregulatorandloadwillhavealoadregulationduetolineresistanceof0.05ΩxIL.IfR1(=125Ω)iscon-nectedneartheload,theeffectivelineresistancewillbe0.05Ω(1+R2/R1)orinthiscase,itis4timesworse.Inaddition,thegroundsideoftheresistorR2canbereturnednearthegroundoftheloadtoprovideremotegroundsens-ingandimproveloadregulation.

10091915

FIGURE4.RegulatorwithProtectionDiode5.0HeatsinkRequirements

Whenanintegratedcircuitoperateswithanappreciablecurrent,itsjunctiontemperatureiselevated.Itisimportanttoquantifyitsthermallimitsinordertoachieveacceptableperformanceandreliability.Thislimitisdeterminedbysum-mingtheindividualpartsconsistingofaseriesoftempera-turerisesfromthesemiconductorjunctiontotheoperatingenvironment.Aone-dimensionalsteady-statemodelofcon-ductionheattransferisdemonstratedinFigure5.Theheatgeneratedatthedevicejunctionflowsthroughthedietothedieattachpad,throughtheleadframetothesurroundingcasematerial,totheprintedcircuitboard,andeventuallytotheambientenvironment.Belowisalistofvariablesthatmayaffectthethermalresistanceandinturntheneedforaheatsink.

RθJC(Component

Variables)

RθCA(Application

Variables)

10091919

LeadframeSize&MaterialMountingPadSize,

Material,&LocationNo.ofConductionPinsDieSize

DieAttachMaterialMoldingCompoundSizeandMaterial

PlacementofMountingPad

PCBSize&MaterialTracesLength&WidthAdjacentHeatSourcesVolumeofAirAmbientTemperatueShapeofMountingPad

FIGURE3.BestLoadRegulationusingAdjustable

OutputRegulator4.0ProtectionDiodes

Undernormaloperation,theLM1117regulatorsdonotneedanyprotectiondiode.Withtheadjustabledevice,theinternalresistancebetweentheadjustandoutputterminalslimitsthecurrent.Nodiodeisneededtodivertthecurrentaroundtheregulatorevenwithcapacitorontheadjustterminal.Theadjustpincantakeatransientsignalof±25Vwithrespecttotheoutputvoltagewithoutdamagingthedevice.

Whenaoutputcapacitorisconnectedtoaregulatorandtheinputisshortedtoground,theoutputcapacitorwilldischargeintotheoutputoftheregulator.Thedischargecurrentde-pendsonthevalueofthecapacitor,theoutputvoltageoftheregulator,andrateofdecreaseofVIN.IntheLM1117regu-lators,theinternaldiodebetweentheoutputandinputpinscanwithstandmicrosecondsurgecurrentsof10Ato20A.

www.national.com

10

LM1117/LM1117IApplicationNote

(Continued)

Thenextparameterwhichmustbecalculatedisthemaxi-mumallowabletemperaturerise,TR(max):

TR(max)=TJ(max)-TA(max)

whereTJ(max)isthemaximumallowablejunctiontempera-ture(125˚C),andTA(max)isthemaximumambienttem-peraturewhichwillbeencounteredintheapplication.

UsingthecalculatedvaluesforTR(max)andPD,themaxi-mumallowablevalueforthejunction-to-ambientthermalresistance(θJA)canbecalculated:θJA=TR(max)/PD10091937

FIGURE5.Cross-sectionalviewofIntegratedCircuitMountedonaprintedcircuitboard.Notethatthecasetemperatureismeasuredatthepointwheretheleads

contactwiththemountingpadsurfaceTheLM1117regulatorshaveinternalthermalshutdowntoprotectthedevicefromover-heating.Underallpossibleoperatingconditions,thejunctiontemperatureoftheLM1117mustbewithintherangeof0˚Cto125˚C.Aheatsinkmayberequireddependingonthemaximumpowerdissipationandmaximumambienttemperatureoftheapplication.Todeter-mineifaheatsinkisneeded,thepowerdissipatedbytheregulator,PD,mustbecalculated:IIN=IL+IGPD=(VIN-VOUT)IL+VINIGFigure6showsthevoltagesandcurrentswhicharepresentinthecircuit.

IfthemaximumallowablevalueforθJAisfoundtobe≥136˚C/WforSOT-223packageor≥79˚C/WforTO-220packageor≥92˚C/WforTO-252package,noheatsinkisneededsincethepackagealonewilldissipateenoughheattosatisfytheserequirements.IfthecalculatedvalueforθJAfallsbelowtheselimits,aheatsinkisrequired.

Asadesignaid,Table1showsthevalueoftheθJAofSOT-223andTO-252fordifferentheatsinkarea.ThecopperpatternsthatweusedtomeasuretheseθJAsareshownattheendoftheApplicationNotesSection.Figure7andFigure8reflectsthesametestresultsaswhatareintheTable1Figure9andFigure10showsthemaximumallowablepowerdissipationvs.ambienttemperaturefortheSOT-223andTO-252device.FiguresFigure11andFigure12showsthemaximumallowablepowerdissipationvs.copperarea(in2)fortheSOT-223andTO-252devices.PleaseseeAN1028forpowerenhancementtechniquestobeusedwithSOT-223andTO-252packages.

*ApplicationNoteAN-1187discussesimprovedthermalper-formanceandpowerdissipationfortheLLP.

10091916

FIGURE6.PowerDissipationDiagram

TABLE1.θJADifferentHeatsinkArea

Layout123456710111213

0.01230.0660.30.530.761000000.0660.175

CopperArea

TopSide(in2)*

BottomSide(in2)

0000000.20.40.60.810.0660.175

11

ThermalResistance

(θJA,˚C/W)SOT-223

1361238475696611598827912593

(θJA,˚C/W)TO-252

10387605247847063575772

www.national.com

LM1117/LM1117IApplicationNote

Layout141516

(Continued)

TABLE1.θJADifferentHeatsinkArea(Continued)

CopperArea

0.2840.3920.5

0.2840.3920.5

837570

ThermalResistance

615553

*Tabofdeviceattachedtotopsidecopper

www.national.com12

LM1117/LM1117IApplicationNote

(Continued)

10091936

10091913

FIGURE10.MaximumAllowablePowerDissipationvs.

AmbientTemperatureforTO-252

FIGURE7.θJAvs.1ozCopperAreaforSOT-223

10091934

10091914

FIGURE8.θJAvs.2ozCopperAreaforTO-252

FIGURE11.MaximumAllowablePowerDissipationvs.

1ozCopperAreaforSOT-223

10091912

10091935

FIGURE9.MaximumAllowablePowerDissipationvs.

AmbientTemperatureforSOT-223

FIGURE12.MaximumAllowablePowerDissipationvs.

2ozCopperAreaforTO-252

13www.national.com

LM1117/LM1117IApplicationNote

(Continued)

10091941

FIGURE13.TopViewoftheThermalTestPatterninActualScale

www.national.com14

LM1117/LM1117IApplicationNote

(Continued)

10091942

FIGURE14.BottomViewoftheThermalTestPatterninActualScale

15www.national.com

LM1117/LM1117ITypicalApplicationCircuits

10091930

10091927

AdjustingOutputofFixedRegulators

5VLogicRegulatorwithElectronicShutdown*

10091931

RegulatorwithReference

10091929

1.25Vto10VAdjustableRegulatorwithImproved

RippleRejection

www.national.com16

LM1117/LM1117ITypicalApplicationCircuits

(Continued)

10091932

BatteryBacked-UpRegulatedSupply

10091933

LowDropoutNegativeSupply

17www.national.com

LM1117/LM1117IPhysicalDimensions

unlessotherwisenoted

inches(millimeters)

3-LeadSOT-223

NSPackageNumberMP04A

3-LeadTO-220

NSPackageNumberT03B

www.national.com18

LM1117/LM1117IPhysicalDimensions

inches(millimeters)unlessotherwisenoted(Continued)

3-LeadTO-263

NSPackageNumberTS3B

19www.national.com

LM1117/LM1117IPhysicalDimensions

inches(millimeters)unlessotherwisenoted(Continued)

3-LeadTO-252

NSPackageNumberTD03B

8-LeadLLP

NSPackageNumberLDC08A

www.national.com20

LM1117/LM1117I800mALow-DropoutLinearRegulatorNotes

LIFESUPPORTPOLICY

NATIONAL’SPRODUCTSARENOTAUTHORIZEDFORUSEASCRITICALCOMPONENTSINLIFESUPPORTDEVICESORSYSTEMSWITHOUTTHEEXPRESSWRITTENAPPROVALOFTHEPRESIDENTANDGENERALCOUNSELOFNATIONALSEMICONDUCTORCORPORATION.Asusedherein:1.Lifesupportdevicesorsystemsaredevicesorsystemswhich,(a)areintendedforsurgicalimplantintothebody,or(b)supportorsustainlife,andwhosefailuretoperformwhenproperlyusedinaccordancewithinstructionsforuseprovidedinthelabeling,canbereasonablyexpectedtoresultinasignificantinjurytotheuser.BANNEDSUBSTANCECOMPLIANCE

NationalSemiconductorcertifiesthattheproductsandpackingmaterialsmeettheprovisionsoftheCustomerProductsStewardshipSpecification(CSP-9-111C2)andtheBannedSubstancesandMaterialsofInterestSpecification(CSP-9-111S2)andcontainno‘‘BannedSubstances’’asdefinedinCSP-9-111S2.

NationalSemiconductorAmericasCustomerSupportCenter

Email:new.feedback@nsc.comTel:1-800-272-9959

www.national.com

NationalSemiconductor

EuropeCustomerSupportCenter

Fax:+49(0)180-5308586Email:europe.support@nsc.com

DeutschTel:+49(0)6995086208EnglishTel:+44(0)8702402171FrançaisTel:+33(0)141918790

NationalSemiconductorAsiaPacificCustomerSupportCenter

Email:ap.support@nsc.com

NationalSemiconductor

JapanCustomerSupportCenterFax:81-3-5639-7507

Email:jpn.feedback@nsc.comTel:81-3-5639-7560

2.Acriticalcomponentisanycomponentofalifesupportdeviceorsystemwhosefailuretoperformcanbereasonablyexpectedtocausethefailureofthelifesupportdeviceorsystem,ortoaffectitssafetyoreffectiveness.

Nationaldoesnotassumeanyresponsibilityforuseofanycircuitrydescribed,nocircuitpatentlicensesareimpliedandNationalreservestherightatanytimewithoutnoticetochangesaidcircuitryandspecifications.