LM117/LM317A/LM317
3-TerminalAdjustableRegulator
GeneralDescription
TheLM117seriesofadjustable3-terminalpositivevoltageregulatorsiscapableofsupplyinginexcessof1.5Aovera1.2Vto37Voutputrange.Theyareexceptionallyeasytouseandrequireonlytwoexternalresistorstosettheoutputvoltage.Further,bothlineandloadregulationarebetterthanstandardfixedregulators.Also,theLM117ispackagedinstandardtransistorpackageswhichareeasilymountedandhandled.
Inadditiontohigherperformancethanfixedregulators,theLM117seriesoffersfulloverloadprotectionavailableonlyinIC’s.Includedonthechiparecurrentlimit,thermaloverloadprotectionandsafeareaprotection.Alloverloadprotectioncircuitryremainsfullyfunctionaleveniftheadjustmentter-minalisdisconnected.
Normally,nocapacitorsareneededunlessthedeviceissituatedmorethan6inchesfromtheinputfiltercapacitorsinwhichcaseaninputbypassisneeded.Anoptionaloutputcapacitorcanbeaddedtoimprovetransientresponse.Theadjustmentterminalcanbebypassedtoachieveveryhighripplerejectionratioswhicharedifficulttoachievewithstan-dard3-terminalregulators.
Besidesreplacingfixedregulators,theLM117isusefulinawidevarietyofotherapplications.Sincetheregulatoris“floating”andseesonlytheinput-to-outputdifferentialvolt-age,suppliesofseveralhundredvoltscanberegulatedaslongasthemaximuminputtooutputdifferentialisnotex-ceeded,i.e.,avoidshort-circuitingtheoutput.
Also,itmakesanespeciallysimpleadjustableswitchingregulator,aprogrammableoutputregulator,orbyconnectingafixedresistorbetweentheadjustmentpinandoutput,theLM117canbeusedasaprecisioncurrentregulator.Sup-plieswithelectronicshutdowncanbeachievedbyclampingtheadjustmentterminaltogroundwhichprogramstheout-putto1.2Vwheremostloadsdrawlittlecurrent.
Forapplicationsrequiringgreateroutputcurrent,seeLM150series(3A)andLM138series(5A)datasheets.Forthenegativecomplement,seeLM137seriesdatasheet.
Features
nnnnnnnnn
Guaranteed1%outputvoltagetolerance(LM317A)Guaranteedmax.0.01%/Vlineregulation(LM317A)Guaranteedmax.0.3%loadregulation(LM117)Guaranteed1.5AoutputcurrentAdjustableoutputdownto1.2V
CurrentlimitconstantwithtemperatureP+ProductEnhancementtested80dBripplerejection
Outputisshort-circuitprotected
TypicalApplications
1.2V–25VAdjustableRegulator
LM117SeriesPackagesPartNumber
SuffixKHTESEMPMDT
00906301
Design
PackageTO-3TO-39TO-220LCCTO-263SOT-223TO-252
LoadCurrent1.5A0.5A1.5A0.5A1.5A1A0.5A
Fulloutputcurrentnotavailableathighinput-outputvoltages*Neededifdeviceismorethan6inchesfromfiltercapacitors.
†Optional—improvestransientresponse.Outputcapacitorsintherangeof1µFto1000µFofaluminumortantalumelectrolyticarecommonlyusedtoprovideimprovedoutputimpedanceandrejectionoftransients.
SOT-223vs.D-Pak(TO-252)Packages
00906354
Scale1:1
©2004NationalSemiconductorCorporationDS009063www.national.com
LM117/LM317A/LM317ConnectionDiagrams
(TO-3)
MetalCanPackage
(TO-39)
MetalCanPackage
00906331
CASEISOUTPUT
00906330
CASEISOUTPUT
BottomView
NSPackageNumberH03A
BottomViewSteelPackage
NSPackageNumberK02AorK02C(TO-263)Surface-MountPackage
(TO-220)PlasticPackage
00906335
TopView
00906332
FrontView
NSPackageNumberT03B
CeramicLeadlessChipCarrier
00906336
SideView
NSPackageNumberTS3B
00906334
TopView
NSPackageNumberE20A
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LM117/LM317A/LM317ConnectionDiagrams
(Continued)
TO-252(D-Pak)
4-LeadSOT-223
00906359
FrontView
NSPackageNumberMP04A
00906366
FrontView
NSPackageNumberTD03B
OrderingInformation
PackageMetalCan(TO-3)MetalCan(TO-39)
TemperatureRange−55˚C≤TJ≤+150˚C0˚C≤TJ≤+125˚C−55˚C≤TJ≤+150˚C−55˚C≤TJ≤+150˚C−55˚C≤TJ≤+150˚C−40˚C≤TJ≤+125˚C0˚C≤TJ≤+125˚C
TO-2203-LeadTO-2633-LeadLCCSOT-2234-Lead
−40˚C≤TJ≤+125˚C0˚C≤TJ≤+125˚C0˚C≤TJ≤+125˚C−55˚C≤TJ≤+150˚C0˚C≤TJ≤+125˚C−40˚C≤TJ≤+125˚C
D-Pack3-Lead
0˚C≤TJ≤+125˚C−40˚C≤TJ≤+125˚C
PartNumberLM117KSTEELLM317KSTEELLM117K/883LM117HLM117H/883LM317AHLM317HLM317ATLM317TLM317SLM317SXLM117E/883LM317EMPLM317EMPXLM317AEMPLM317AEMPXLM317MDTLM317MDTXLM317AMDTLM317AMDTX
LM317AMDTLM317MDTN07ALM117E/883
N01APackageMarkingLM117KSTEELP+LM317KSTEELP+
LM117K/883LM117HP+LM117H/883LM317AHP+LM317HP+LM317ATP+LM317TP+LM317SP+
TransportMedia50PerBag50PerBag50PerBag500PerBox20PerTray500PerBox500PerBox45Units/Rail45Units/Rail45Units/Rail500UnitsTapeandReel
50Units/Rail1kUnitsTapeandReel2kUnitsTapeandReel1kUnitsTapeandReel2kUnitsTapeandReel
75Units/Rail2.5kUnitsTapeandReel
75Units/Rail2.5kUnitsTapeandReel
TD03BE20AMP04ATS3BT03BK02CH03ANSCDrawingK02A
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LM117/LM317A/LM317AbsoluteMaximumRatings(Note1)
IfMilitary/Aerospacespecifieddevicesarerequired,pleasecontacttheNationalSemiconductorSalesOffice/Distributorsforavailabilityandspecifications.PowerDissipation
Input-OutputVoltageDifferentialStorageTemperatureLeadTemperature
MetalPackage(Soldering,10seconds)PlasticPackage(Soldering,4seconds)
300˚C260˚C
InternallyLimited
+40V,−0.3V−65˚Cto+150˚C
ESDTolerance(Note5)3kV
OperatingTemperatureRange
LM117LM317ALM317
Preconditioning
ThermalLimitBurn-In
AllDevices100%−55˚C≤TJ≤+150˚C−40˚C≤TJ≤+125˚C0˚C≤TJ≤+125˚C
ElectricalCharacteristics(Note3)
SpecificationswithstandardtypefaceareforTJ=25˚C,andthosewithboldfacetypeapplyoverfullOperatingTempera-tureRange.Unlessotherwisespecified,VIN−VOUT=5V,andIOUT=10mA.
Parameter
ReferenceVoltage
3V≤(VIN−VOUT)≤40V,10mA≤IOUT≤IMAX,P≤PMAXLineRegulationLoadRegulationThermalRegulationAdjustmentPinCurrentAdjustmentPinCurrentChangeTemperatureStabilityMinimumLoadCurrentCurrentLimit
10mA≤IOUT≤IMAX3V≤(VIN−VOUT)≤40VTMIN≤TJ≤TMAX(VIN−VOUT)=40V(VIN−VOUT)≤15VKPackageHPackage(VIN−VOUT)=40VKPackageHPackage
RMSOutputNoise,%ofVOUTRippleRejectionRatio
10Hz≤f≤10kHzVOUT=10V,f=120Hz,CADJ=0µF
VOUT=10V,f=120Hz,CADJ=10µF
Long-TermStabilityThermalResistance,Junction-to-Case
ThermalResistance,Junction-to-Ambient(NoHeatSink)
TJ=125˚C,1000hrsKPackageHPackageEPackageKPackageHPackageEPackage
351400.32.312
1315
%˚C/W˚C/W˚C/W˚C/W˚C/W˚C/W
66
80
dB
0.30.15
0.40.20.00365
AA%dB
1.50.5
2.20.8
3.41.8
AA
13.5
5
%mA
3V≤(VIN−VOUT)≤40V(Note4)10mA≤IOUT≤IMAX(Note4)20msPulse
0.010.020.10.30.03500.2
0.020.050.310.071005
%/V%/V%%%/WµAµA
1.20
1.25
1.30
Conditions
Min
LM117(Note2)
Typ
Max
VVUnits
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LM117/LM317A/LM317ElectricalCharacteristics(Note3)
SpecificationswithstandardtypefaceareforTJ=25˚C,andthosewithboldfacetypeapplyoverfullOperatingTempera-tureRange.Unlessotherwisespecified,VIN−VOUT=5V,andIOUT=10mA.
Parameter
ReferenceVoltage
3V≤(VIN−VOUT)≤40V,10mA≤IOUT≤IMAX,P≤PMAXLineRegulationLoadRegulationThermalRegulationAdjustmentPinCurrentAdjustmentPinCurrentChange
TemperatureStabilityMinimumLoadCurrentCurrentLimit
10mA≤IOUT≤IMAX3V≤(VIN−VOUT)≤40VTMIN≤TJ≤TMAX(VIN−VOUT)=40V(VIN−VOUT)≤15VK,T,SPackagesHPackageMPPackage(VIN−VOUT)=40VK,T,SPackagesHPackageMPPackage
RMSOutputNoise,%ofVOUTRippleRejectionRatio
10Hz≤f≤10kHzVOUT=10V,f=120Hz,CADJ=0µF
VOUT=10V,f=120Hz,CADJ=10µF
Long-TermStabilityThermalResistance,Junction-to-Case
TJ=125˚C,1000hrsKPackageMDTPackageHPackageTPackageMPPackage
ThermalResistance,
Junction-to-Ambient(NoHeatSink)
KPackage
MDTPackage(Note6)HPackageTPackage
SPackage(Note6)
12423.5351405050
155
0.3
1
0.32.3512423.535921405050
1315
%˚C/W˚C/W˚C/W˚C/W˚C/W˚C/W˚C/W˚C/W˚C/W˚C/W
66
80
66
80
dB
0.150.0750.15
0.40.20.40.00365
0.150.0750.15
0.40.20.40.00365
AAA%dB
1.50.51.5
2.20.82.2
3.41.83.4
1.50.51.5
2.20.82.2
3.41.83.4
AAA
13.5
10
13.5
10
%mA
3V≤(VIN−VOUT)≤40V(Note4)10mA≤IOUT≤IMAX(Note4)20msPulse
0.0050.010.10.30.04500.2
0.010.020.510.071005
0.010.020.10.30.04500.2
0.040.070.51.50.071005
%/V%/V%%%/WµAµA
Conditions
Min1.2381.225
LM317ATyp1.2501.250
Max1.2621.270
1.20
1.25
1.30
Min
LM317Typ
Max
VVUnits
Note1:AbsoluteMaximumRatingsindicatelimitsbeyondwhichdamagetothedevicemayoccur.OperatingRatingsindicateconditionsforwhichthedeviceisintendedtobefunctional,butdonotguaranteespecificperformancelimits.Forguaranteedspecificationsandtestconditions,seetheElectricalCharacteristics.Theguaranteedspecificationsapplyonlyforthetestconditionslisted.
Note2:RefertoRETS117HdrawingfortheLM117H,ortheRETS117KfortheLM117Kmilitaryspecifications.
Note3:Althoughpowerdissipationisinternallylimited,thesespecificationsareapplicableformaximumpowerdissipationsof2WfortheTO-39andSOT-223and20WfortheTO-3,TO-220,andTO-263.IMAXis1.5AfortheTO-3,TO-220,andTO-263packages,0.5AfortheTO-39packageand1AfortheSOT-223Package.Alllimits(i.e.,thenumbersintheMin.andMax.columns)areguaranteedtoNational’sAOQL(AverageOutgoingQualityLevel).
Note4:Regulationismeasuredataconstantjunctiontemperature,usingpulsetestingwithalowdutycycle.Changesinoutputvoltageduetoheatingeffectsarecoveredunderthespecificationsforthermalregulation.
Note5:Humanbodymodel,100pFdischargedthrougha1.5kΩresistor.
Note6:IftheTO-263orTO-252packagesareused,thethermalresistancecanbereducedbyincreasingthePCboardcopperareathermallyconnectedtothepackage.Using0.5squareinchesofcopperarea.θJAis50˚C/W;with1squareinchofcopperarea,θJAis37˚C/W;andwith1.6ormoresquareinchesofcopperarea,θJAis32˚C/W.IftheSOT-223packageisused,thethermalresistancecanbereducedbyincreasingthePCboardcopperarea(seeapplicationshintsforheatsinking).
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LM117/LM317A/LM317TypicalPerformanceCharacteristics
LoadRegulation
OutputCapacitor=0µFunlessotherwisenoted
CurrentLimit
00906337
00906338
AdjustmentCurrentDropoutVoltage
00906339
00906340
TemperatureStabilityMinimumOperatingCurrent
00906341
00906342
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LM117/LM317A/LM317TypicalPerformanceCharacteristicsOutputCapacitor=0µFunlessotherwisenoted
RippleRejection
RippleRejection
(Continued)
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00906344
RippleRejectionOutputImpedance
00906345
00906346
LineTransientResponseLoadTransientResponse
0090634700906348
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LM117/LM317A/LM317ApplicationHints
Inoperation,theLM117developsanominal1.25Vreferencevoltage,VREF,betweentheoutputandadjustmentterminal.ThereferencevoltageisimpressedacrossprogramresistorR1and,sincethevoltageisconstant,aconstantcurrentI1thenflowsthroughtheoutputsetresistorR2,givinganoutputvoltageof
cancauseexcessiveringing.Thisoccurswithvaluesbe-tween500pFand5000pF.A1µFsolidtantalum(or25µFaluminumelectrolytic)ontheoutputswampsthiseffectandinsuresstability.Anyincreaseoftheloadcapacitancelargerthan10µFwillmerelyimprovetheloopstabilityandoutputimpedance.
LOADREGULATION
TheLM117iscapableofprovidingextremelygoodloadregulationbutafewprecautionsareneededtoobtainmaxi-mumperformance.Thecurrentsetresistorconnectedbe-tweentheadjustmentterminalandtheoutputterminal(usu-ally240Ω)shouldbetieddirectlytotheoutput(case)oftheregulatorratherthanneartheload.Thiseliminateslinedropsfromappearingeffectivelyinserieswiththereferenceanddegradingregulation.Forexample,a15Vregulatorwith0.05Ωresistancebetweentheregulatorandloadwillhavealoadregulationduetolineresistanceof0.05ΩxIL.Ifthesetresistorisconnectedneartheloadtheeffectivelineresis-tancewillbe0.05Ω(1+R2/R1)orinthiscase,11.5timesworse.
Figure2showstheeffectofresistancebetweentheregula-torand240Ωsetresistor.
00906305
FIGURE1.
Sincethe100µAcurrentfromtheadjustmentterminalrepre-sentsanerrorterm,theLM117wasdesignedtominimizeIADJandmakeitveryconstantwithlineandloadchanges.Todothis,allquiescentoperatingcurrentisreturnedtotheoutputestablishingaminimumloadcurrentrequirement.Ifthereisinsufficientloadontheoutput,theoutputwillrise.EXTERNALCAPACITORS
Aninputbypasscapacitorisrecommended.A0.1µFdiscor1µFsolidtantalumontheinputissuitableinputbypassingforalmostallapplications.Thedeviceismoresensitivetotheabsenceofinputbypassingwhenadjustmentoroutputcapacitorsareusedbuttheabovevalueswilleliminatethepossibilityofproblems.
TheadjustmentterminalcanbebypassedtogroundontheLM117toimproveripplerejection.Thisbypasscapacitorpreventsripplefrombeingamplifiedastheoutputvoltageisincreased.Witha10µFbypasscapacitor80dBripplerejec-tionisobtainableatanyoutputlevel.Increasesover10µFdonotappreciablyimprovetheripplerejectionatfrequenciesabove120Hz.Ifthebypasscapacitorisused,itissome-timesnecessarytoincludeprotectiondiodestopreventthecapacitorfromdischargingthroughinternallowcurrentpathsanddamagingthedevice.
Ingeneral,thebesttypeofcapacitorstouseissolidtanta-lum.Solidtantalumcapacitorshavelowimpedanceevenathighfrequencies.Dependinguponcapacitorconstruction,ittakesabout25µFinaluminumelectrolytictoequal1µFsolidtantalumathighfrequencies.Ceramiccapacitorsarealsogoodathighfrequencies;butsometypeshavealargedecreaseincapacitanceatfrequenciesaround0.5MHz.Forthisreason,0.01µFdiscmayseemtoworkbetterthana0.1µFdiscasabypass.
AlthoughtheLM117isstablewithnooutputcapacitors,likeanyfeedbackcircuit,certainvaluesofexternalcapacitance
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00906306
FIGURE2.RegulatorwithLineResistanceinOutput
LeadWiththeTO-3package,itiseasytominimizetheresistancefromthecasetothesetresistor,byusingtwoseparateleadstothecase.However,withtheTO-39package,careshouldbetakentominimizethewirelengthoftheoutputlead.ThegroundofR2canbereturnednearthegroundoftheloadtoprovideremotegroundsensingandimproveloadregulation.PROTECTIONDIODES
WhenexternalcapacitorsareusedwithanyICregulatoritissometimesnecessarytoaddprotectiondiodestopreventthecapacitorsfromdischargingthroughlowcurrentpointsintotheregulator.Most10µFcapacitorshavelowenoughinternalseriesresistancetodeliver20Aspikeswhenshorted.Althoughthesurgeisshort,thereisenoughenergytodamagepartsoftheIC.
Whenanoutputcapacitorisconnectedtoaregulatorandtheinputisshorted,theoutputcapacitorwilldischargeintotheoutputoftheregulator.Thedischargecurrentdependsonthevalueofthecapacitor,theoutputvoltageoftheregulator,andtherateofdecreaseofVIN.IntheLM117,thisdischargepathisthroughalargejunctionthatisabletosustain15Asurgewithnoproblem.Thisisnottrueofothertypesofpositiveregulators.Foroutputcapacitorsof25µForless,thereisnoneedtousediodes.
Thebypasscapacitorontheadjustmentterminalcandis-chargethroughalowcurrentjunction.Dischargeoccurs
LM117/LM317A/LM317ApplicationHints
(Continued)
wheneithertheinputoroutputisshorted.InternaltotheLM117isa50Ωresistorwhichlimitsthepeakdischargecurrent.Noprotectionisneededforoutputvoltagesof25Vorlessand10µFcapacitance.Figure3showsanLM117withprotectiondiodesincludedforusewithoutputsgreaterthan25Vandhighvaluesofoutputcapacitance.
00906355
FIGURE4.θ(J−A)vsCopper(1ounce)Areaforthe
TO-263Package
00906307
D1protectsagainstC1D2protectsagainstC2
FIGURE3.RegulatorwithProtectionDiodesWhenavalueforθ(H−A)isfoundusingtheequationshown,aheatsinkmustbeselectedthathasavaluethatislessthanorequaltothisnumber.
θ(H−A)isspecifiednumericallybytheheatsinkmanufacturerinthecatalog,orshowninacurvethatplotstemperaturerisevspowerdissipationfortheheatsink.
HEATSINKINGTO-263,SOT-223ANDTO-252PACKAGEPARTS
TheTO-263(“S”),SOT-223(“MP”)andTO-252(”DT”)pack-agesuseacopperplaneonthePCBandthePCBitselfasaheatsink.TooptimizetheheatsinkingabilityoftheplaneandPCB,solderthetabofthepackagetotheplane.
Figure4showsfortheTO-263themeasuredvaluesofθ(J−A)fordifferentcopperareasizesusingatypicalPCBwith1ouncecopperandnosoldermaskoverthecopperareausedforheatsinking.
Asshowninthefigure,increasingthecopperareabeyond1squareinchproducesverylittleimprovement.Itshouldalsobeobservedthattheminimumvalueofθ(J−A)fortheTO-263packagemountedtoaPCBis32˚C/W.
Asadesignaid,Figure5showsthemaximumallowablepowerdissipationcomparedtoambienttemperaturefortheTO-263device(assumingθ(J−A)is35˚C/Wandthemaxi-mumjunctiontemperatureis125˚C).
00906356
FIGURE5.MaximumPowerDissipationvsTAMBfor
theTO-263PackageFigure6andFigure7showtheinformationfortheSOT-223package.Figure7assumesaθ(J−A)of74˚C/Wfor1ouncecopperand51˚C/Wfor2ouncecopperandamaximumjunctiontemperatureof125˚C.
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LM117/LM317A/LM317ApplicationHints
(Continued)
mineifaheatsinkisneeded,thepowerdissipatedbytheregulator,PD,mustbecalculated:IIN=IL+IGPD=(VIN−VOUT)IL+VINIGFigure8showsthevoltageandcurrentswhicharepresentinthecircuit.
00906360
00906357
FIGURE6.θ(J−A)vsCopper(2ounce)Areaforthe
SOT-223Package
FIGURE8.PowerDissipationDiagram
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)/PDIfthemaximumallowablevalueforθJAisfoundtobe≥92˚C/W(TypicalRatedValue)forTO-252package,noheatsinkisneededsincethepackagealonewilldissipateenoughheattosatisfytheserequirements.IfthecalculatedvalueforθJAfallsbelowtheselimits,aheatsinkisrequired.Asadesignaid,Table1showsthevalueoftheθJAofTO-252fordifferentheatsinkarea.ThecopperpatternsthatweusedtomeasuretheseθJAsareshownattheendoftheApplicationNotesSection.Figure9reflectsthesametestresultsaswhatareintheTable1
Figure10showsthemaximumallowablepowerdissipationvs.ambienttemperaturefortheTO-252device.Figure11showsthemaximumallowablepowerdissipationvs.copperarea(in2)fortheTO-252device.PleaseseeAN1028forpowerenhancementtechniquestobeusedwithSOT-223andTO-252packages.
00906358
FIGURE7.MaximumPowerDissipationvsTAMBfor
theSOT-223PackageTheLM317regulatorshaveinternalthermalshutdowntoprotectthedevicefromover-heating.Underallpossibleoperatingconditions,thejunctiontemperatureoftheLM317mustbewithintherangeof0˚Cto125˚C.Aheatsinkmayberequireddependingonthemaximumpowerdissipationandmaximumambienttemperatureoftheapplication.Todeter-
TABLE1.θJADifferentHeatsinkArea
Layout
TopSide(in2)*
123456789
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CopperArea
BottomSide(in2)
0000000.20.40.6
10
ThermalResistance(θJA˚C/W)TO-252
1038760545247847063
0.01230.0660.30.530.761000
LM117/LM317A/LM317ApplicationHints
Layout10111213141516
(Continued)
TABLE1.θJADifferentHeatsinkArea(Continued)
CopperArea
000.0660.1750.2840.3920.5
0.810.0660.1750.2840.3920.5
ThermalResistance
57578972615553
Note:*Tabofdeviceattachedtotopsideofcopper.
00906361
FIGURE9.θJAvs2ozCopperAreaforTO-252
00906363
FIGURE10.MaximumAllowablePowerDissipationvs.AmbientTemperatureforTO-252
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LM117/LM317A/LM317ApplicationHints
(Continued)
00906362
FIGURE11.MaximumAllowablePowerDissipationvs.2ozCopperAreaforTO-252
00906364
FIGURE12.TopViewoftheThermalTestPatterninActualScale
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LM117/LM317A/LM317ApplicationHints
(Continued)
00906365
FIGURE13.BottomViewoftheThermalTestPatterninActualScale
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LM117/LM317A/LM317SchematicDiagram
00906308
TypicalApplications
5VLogicRegulatorwithElectronicShutdown*
AdjustableRegulatorwithImprovedRippleRejection
00906310
†Solidtantalum
00906303
*DischargesC1ifoutputisshortedtoground
*Min.output)1.2V
HighStability10VRegulator
SlowTurn-On15VRegulator
00906309
00906311
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LM117/LM317A/LM317TypicalApplications
(Continued)
HighCurrentAdjustableRegulator
00906312
‡Optional—improvesripplerejection
†Solidtantalum
*Minimumloadcurrent=30mA
0to30VRegulatorPowerFollower
00906313
Fulloutputcurrentnotavailableathighinput-outputvoltages
00906314
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LM117/LM317A/LM317TypicalApplications
(Continued)
5AConstantVoltage/ConstantCurrentRegulator
00906315
†Solidtantalum
*Lightsinconstantcurrentmode
1ACurrentRegulatorHighGainAmplifier
00906316
1.2V–20VRegulatorwithMinimumProgramCurrent
00906318
00906317
*Minimumloadcurrent)4mA
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LM117/LM317A/LM317TypicalApplications
(Continued)
LowCost3ASwitchingRegulator
00906319
†Solidtantalum
*Core—ArnoldA-254168-260turns
4ASwitchingRegulatorwithOverloadProtection
00906320
†Solidtantalum
*Core—ArnoldA-254168-260turns
PrecisionCurrentLimiter
00906321
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LM117/LM317A/LM317TypicalApplications
(Continued)
TrackingPreregulator
00906322
CurrentLimitedVoltageRegulator
00906323
(ComparedtoLM117’shighercurrentlimit)
—At50mAoutputonly3⁄4voltofdropoccursinR3andR4
AdjustingMultipleOn-CardRegulatorswithSingleControl*
00906324
*Alloutputswithin±100mV†Minimumload—10mA
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LM117/LM317A/LM317TypicalApplications
(Continued)
ACVoltageRegulator
00906325
12VBatteryCharger
00906326
UseofRSallowslowchargingrateswithfullychargedbattery.
50mAConstantCurrentBatteryCharger
00906327
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LM117/LM317A/LM317TypicalApplications
(Continued)
Adjustable4ARegulator
00906328
CurrentLimited6VChargerDigitallySelectedOutputs
00906329
*Setspeakcurrent(0.6Afor1Ω)
**The1000µFisrecommendedtofilteroutinputtransients
00906302
*SetsmaximumVOUT
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LM117/LM317A/LM317PhysicalDimensions
unlessotherwisenoted
inches(millimeters)
TO-3MetalCanPackage(K)NSPackageNumberK02A
TO-3MetalCanPackage(K)
Mil-AeroProduct
NSPackageNumberK02C
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LM117/LM317A/LM317PhysicalDimensions
inches(millimeters)unlessotherwisenoted(Continued)
(TO-39)MetalCanPackageNSPackageNumberH03A
3-LeadTO-220
NSPackageNumberT03B
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LM117/LM317A/LM317PhysicalDimensions
inches(millimeters)unlessotherwisenoted(Continued)
3-LeadTO-263
NSPackageNumberTS3B
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LM117/LM317A/LM317PhysicalDimensions
inches(millimeters)unlessotherwisenoted(Continued)
CeramicLeadlessChipCarrierNSPackageNumberE20A
4-LeadSOT-223
NSPackageNumberMP04A
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LM117/LM317A/LM3173-TerminalAdjustableRegulatorPhysicalDimensions
inches(millimeters)unlessotherwisenoted(Continued)
3-LeadD-Pack
NSPackageNumberTD03B
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.
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2.Acriticalcomponentisanycomponentofalifesupportdeviceorsystemwhosefailuretoperformcanbereasonablyexpectedtocausethefailureofthelifesupportdeviceorsystem,ortoaffectitssafetyoreffectiveness.
Nationaldoesnotassumeanyresponsibilityforuseofanycircuitrydescribed,nocircuitpatentlicensesareimpliedandNationalreservestherightatanytimewithoutnoticetochangesaidcircuitryandspecifications.
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