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March2014DocID2148Rev81/35L78S2ApositivevoltageregulatorICDatasheet-productiondataFeaturesOutputcurrentupto2AOutputvoltagesof5;7.
5;9;10;12;15;18;24VThermalprotectionShortcircuitprotectionOutputtransitionSOAprotectionDescriptionTheL78Sseriesofthree-terminalpositiveregulatorsisavailableinTO-220packageandseveralfixedoutputvoltages,makingitusefulinawiderangeofapplications.
Theseregulatorscanprovidelocalon-cardregulation,eliminatingthedistributionproblemsassociatedwithsinglepointregulation.
Eachtypeembedsinternalcurrentlimiting,thermalshut-downandsafeareaprotection,makingitessentiallyindestructible.
Ifadequateheatsinkingisprovided,theycandeliverover2Aoutputcurrent.
Althoughdesignedprimarilyasfixedvoltageregulators,thesedevicescanbeusedwithexternalcomponentstoobtainadjustablevoltagesandcurrents.
TO-220Table1.
DevicesummaryPartnumbersTO-220packagesOutputvoltageDualgaugeSinglegaugeL78S05CL78S05CV-DGL78S05CV5VL78S75CL78S75CV-DGL78S75CV7.
5VL78S09CL78S09CV-DGL78S09CV9VL78S10CL78S10CV-DGL78S10CV10VL78S12CL78S12CV-DGL78S12CV12VL78S15CL78S15CV-DGL78S15CV15VL78S18CL78S18CV18VL78S24CL78S24CV24Vwww.
st.
comContentsL78S2/35DocID2148Rev8Contents1Diagram52Pinconfiguration63Maximumratings74Testcircuits85Electricalcharacteristics96Typicalperformance177Packagemechanicaldata288Packagingmechanicaldata339Revisionhistory34DocID2148Rev83/35L78SListoftables35ListoftablesTable1.
Devicesummary1Table2.
Absolutemaximumratings7Table3.
Thermaldata.
7Table4.
ElectricalcharacteristicsofL78S05C9Table5.
ElectricalcharacteristicsofL78S75C10Table6.
ElectricalcharacteristicsofL78S09C11Table7.
ElectricalcharacteristicsofL78S10C12Table8.
ElectricalcharacteristicsofL78S12C13Table9.
ElectricalcharacteristicsofL78S15C14Table10.
ElectricalcharacteristicsofL78S18C15Table11.
ElectricalcharacteristicsofL78S24C16Table12.
TO-220(dualgauge)mechanicaldata30Table13.
TO-220SG(singlegauge)mechanicaldata32Table14.
Documentrevisionhistory34ListoffiguresL78S4/35DocID2148Rev8ListoffiguresFigure1.
Blockdiagram5Figure2.
Pinconnections(topview)6Figure3.
Schematicdiagram6Figure4.
Applicationcircuits7Figure5.
DCparameter8Figure6.
Loadregulation8Figure7.
Ripplerejection8Figure8.
Dropoutvoltagevs.
junctiontemperature17Figure9.
Peakoutputcurrentvs.
input/outputdifferentialvoltage.
17Figure10.
Outputimpedancevs.
frequency17Figure11.
Outputvoltagevs.
junctiontemperature17Figure12.
Supplyvoltagerejectionvs.
frequency18Figure13.
Quiescentcurrentvs.
junctiontemperature18Figure14.
Loadtransientresponse18Figure15.
Linetransientresponse18Figure16.
Quiescentcurrentvs.
inputvoltage18Figure17.
Fixedoutputregulator.
19Figure18.
Constantcurrentregulator19Figure19.
Circuitforincreasingoutputvoltage19Figure20.
Adjustableoutputregulator(7to30V)20Figure21.
0.
5to10Vregulator20Figure22.
Highcurrentvoltageregulator21Figure23.
Highoutputcurrentwithshortcircuitprotection21Figure24.
Trackingvoltageregulator22Figure25.
Positiveandnegativeregulator22Figure26.
Negativeoutputvoltagecircuit23Figure27.
Switchingregulator23Figure28.
Highinputvoltagecircuit.
23Figure29.
Highinputvoltagecircuit.
24Figure30.
Highoutputvoltageregulator24Figure31.
Highinputandoutputvoltage24Figure32.
Reducingpowerdissipationwithdroppingresistor.
25Figure33.
Remoteshutdown.
25Figure34.
PowerAMmodulator(unityvoltagegain,IO1A)26Figure35.
Adjustableoutputvoltagewithtemperaturecompensation26Figure36.
Lightcontrollers(VOmin=VXX+VBE)27Figure37.
Protectionagainstinputshort-circuitwithhighcapacitanceloads27Figure38.
TO-220(dualgauge)drawing.
29Figure39.
TO-220SG(singlegauge)drawing31Figure40.
TubeforTO-220(dualgauge)(mm.
33Figure41.
TubeforTO-220(singlegauge)(mm.
33DocID2148Rev85/35L78SDiagram351DiagramFigure1.
BlockdiagramPinconfigurationL78S6/35DocID2148Rev82PinconfigurationFigure2.
Pinconnections(topview)72*5281'*5281'Figure3.
SchematicdiagramDocID2148Rev87/35L78SMaximumratings353MaximumratingsNote:Absolutemaximumratingsarethosevaluesbeyondwhichdamagetothedevicemayoccur.
Functionaloperationundertheseconditionisnotimplied.
Table2.
AbsolutemaximumratingsSymbolParameterValueUnitVIDCinputvoltageforVO=5to18V35VforVO=24V40IOOutputcurrentInternallylimitedPDPowerdissipationInternallylimitedTSTGStoragetemperaturerange-65to150°CTOPOperatingjunctiontemperaturerange0to150°CTable3.
ThermaldataSymbolParameterTO-220UnitRthJCThermalresistancejunction-case5°C/WRthJAThermalresistancejunction-ambient50°C/WFigure4.
Applicationcircuits4TestcircuitsL78S8/35DocID2148Rev84TestcircuitsFigure5.
DCparameter4Figure6.
Loadregulation4Figure7.
Ripplerejection4DocID2148Rev89/35L78SElectricalcharacteristics355ElectricalcharacteristicsRefertothetestcircuits,TJ=25°C,VI=10V,IO=500mA,unlessotherwisespecified.
Table4.
ElectricalcharacteristicsofL78S05CSymbolParameterTestconditionsMin.
Typ.
Max.
UnitVOOutputvoltage4.
855.
2VVOOutputvoltageIO=1A,VI=7V4.
7555.
25VΔVOLineregulationVI=7to25V100mVVI=8to25V50ΔVOLoadregulationIO=20mAto1.
5A100mVIO=2A80IQQuiescentcurrent8mAΔIQQuiescentcurrentchangeIO=20mAto1A0.
5mAVI=7to25V,IO=20mA1.
3ΔVO/ΔTOutputvoltagedriftIO=5mA,TJ=0°Cto70°C-1.
1mV/°CeNOutputnoisevoltageB=10Hzto100kHz40VSVRSupplyvoltagerejectionf=120Hz54(1)dBVIOperatinginputvoltageIO≤1A8VROOutputresistancef=1kHz17mΩIscShortcircuitcurrentVI=27V500mAIscpShortcircuitpeakcurrent3A1.
Guaranteedbydesign.
ElectricalcharacteristicsL78S10/35DocID2148Rev8Refertothetestcircuits,TJ=25°C,VI=12.
5V,IO=500mA,unlessotherwisespecified.
Table5.
ElectricalcharacteristicsofL78S75CSymbolParameterTestconditionsMin.
Typ.
Max.
UnitVOOutputvoltage7.
157.
57.
9VVOOutputvoltageIO=1A,VI=9.
5V7.
17.
57.
95VΔVOLineregulationVI=9.
5to25V120mVVI=10.
5to20V60ΔVOLoadregulationIO=20mAto1.
5A140mVIO=2A100IQQuiescentcurrent8mAΔIQQuiescentcurrentchangeIO=20mAto1A0.
5mAVI=9.
5to25V,IO=20mA1.
3ΔVO/ΔTOutputvoltagedriftIO=5mA,TJ=0°Cto70°C-0.
8mV/°CeNOutputnoisevoltageB=10Hzto100kHz52VSVRSupplyvoltagerejectionf=120Hz48(1)dBVIOperatinginputvoltageIO≤1A10.
5VROOutputresistancef=1kHz16mΩIscShortcircuitcurrentVI=27V500mAIscpShortcircuitpeakcurrent3A1.
Guaranteedbydesign.
DocID2148Rev811/35L78SElectricalcharacteristics35Refertothetestcircuits,TJ=25°C,VI=14V,IO=500mA,unlessotherwisespecified.
Table6.
ElectricalcharacteristicsofL78S09CSymbolParameterTestconditionsMin.
Typ.
Max.
UnitVOOutputvoltage8.
6599.
35VVOOutputvoltageIO=1A,VI=11V8.
699.
4VΔVOLineregulationVI=11to25V130mVVI=11to20V65ΔVOLoadregulationIO=20mAto1.
5A170mVIO=2A100IQQuiescentcurrent8mAΔIQQuiescentcurrentchangeIO=20mAto1A0.
5mAVI=11to25V,IO=20mA1.
3ΔVO/ΔTOutputvoltagedriftIO=5mA,TJ=0°Cto70°C-1mV/°CeNOutputnoisevoltageB=10Hzto100kHz60VSVRSupplyvoltagerejectionf=120Hz47(1)dBVIOperatinginputvoltageIO≤1A12VROOutputresistancef=1kHz17mΩIscShortcircuitcurrentVI=27V500mAIscpShortcircuitpeakcurrent3A1.
Guaranteedbydesign.
ElectricalcharacteristicsL78S12/35DocID2148Rev8Refertothetestcircuits,TJ=25°C,VI=15V,IO=500mA,unlessotherwisespecified.
Table7.
ElectricalcharacteristicsofL78S10CSymbolParameterTestconditionsMin.
Typ.
Max.
UnitVOOutputvoltage9.
51010.
5VVOOutputvoltageIO=1A,VI=12.
5V9.
41010.
6VΔVOLineregulationVI=12.
5to30V200mVVI=14to22V100ΔVOLoadregulationIO=20mAto1.
5A240mVIO=2A150IQQuiescentcurrent8mAΔIQQuiescentcurrentchangeIO=20mAto1A0.
5mAVI=12.
5to30V,IO=20mA1ΔVO/ΔTOutputvoltagedriftIO=5mA,TJ=0°Cto70°C-1mV/°CeNOutputnoisevoltageB=10Hzto100kHz65VSVRSupplyvoltagerejectionf=120Hz47(1)dBVIOperatinginputvoltageIO≤1A13VROOutputresistancef=1kHz17mΩIscShortcircuitcurrentVI=27V500mAIscpShortcircuitpeakcurrent3A1.
Guaranteedbydesign.
DocID2148Rev813/35L78SElectricalcharacteristics35Refertothetestcircuits,TJ=25°C,VI=19V,IO=500mA,unlessotherwisespecified.
Table8.
ElectricalcharacteristicsofL78S12CSymbolParameterTestconditionsMin.
Typ.
Max.
UnitVOOutputvoltage11.
51212.
5VVOOutputvoltageIO=1A,VI=14.
5V11.
41212.
6VΔVOLineregulationVI=14.
5to30V240mVVI=16to22V120ΔVOLoadregulationIO=20mAto1.
5A240mVIO=2A150IQQuiescentcurrent8mAΔIQQuiescentcurrentchangeIO=20mAto1A0.
5mAVI=14.
5to30V,IO=20mA1ΔVO/ΔTOutputvoltagedriftIO=5mA,TJ=0°Cto70°C-1mV/°CeNOutputnoisevoltageB=10Hzto100kHz75VSVRSupplyvoltagerejectionf=120Hz47(1)dBVIOperatinginputvoltageIO≤1A15VROOutputresistancef=1kHz18mΩIscShortcircuitcurrentVI=27V500mAIscpShortcircuitpeakcurrent3A1.
Guaranteedbydesign.
ElectricalcharacteristicsL78S14/35DocID2148Rev8Refertothetestcircuits,TJ=25°C,VI=23V,IO=500mA,unlessotherwisespecified.
Table9.
ElectricalcharacteristicsofL78S15CSymbolParameterTestconditionsMin.
Typ.
Max.
UnitVOOutputvoltage14.
41515.
6VVOOutputvoltageIO=1A,VI=17.
5V14.
251515.
75VΔVOLineregulationVI=17.
5to30V300mVVI=20to26V150ΔVOLoadregulationIO=20mAto1.
5A300mVIO=2A150IQQuiescentcurrent8mAΔIQQuiescentcurrentchangeIO=20mAto1A0.
5mAVI=17.
5to30V,IO=20mA1ΔVO/ΔTOutputvoltagedriftIO=5mA,TJ=0°Cto70°C-1mV/°CeNOutputnoisevoltageB=10Hzto100kHz90VSVRSupplyvoltagerejectionf=120Hz46(1)dBVIOperatinginputvoltageIO≤1A18VROOutputresistancef=1kHz19mΩIscShortcircuitcurrentVI=27V500mAIscpShortcircuitpeakcurrent3A1.
Guaranteedbydesign.
DocID2148Rev815/35L78SElectricalcharacteristics35Refertothetestcircuits,TJ=25°C,VI=26V,IO=500mA,unlessotherwisespecified.
Table10.
ElectricalcharacteristicsofL78S18CSymbolParameterTestconditionsMin.
Typ.
Max.
UnitVOOutputvoltage17.
11818.
9VVOOutputvoltageIO=1A,VI=20.
5V171819VΔVOLineregulationVI=20.
5to30V360mVVI=22to28V180ΔVOLoadregulationIO=20mAto1.
5A360mVIO=2A200IQQuiescentcurrent8mAΔIQQuiescentcurrentchangeIO=20mAto1A0.
5mAVI=20.
5to30V,IO=20mA1ΔVO/ΔTOutputvoltagedriftIO=5mA,TJ=0°Cto70°C-1mV/°CeNOutputnoisevoltageB=10Hzto100kHz110VSVRSupplyvoltagerejectionf=120Hz43(1)dBVIOperatinginputvoltageIO≤1A21VROOutputresistancef=1kHz22mΩIscShortcircuitcurrentVI=27V500mAIscpShortcircuitpeakcurrent3A1.
Guaranteedbydesign.
ElectricalcharacteristicsL78S16/35DocID2148Rev8Refertothetestcircuits,TJ=25°C,VI=33V,IO=500mA,unlessotherwisespecified.
Table11.
ElectricalcharacteristicsofL78S24CSymbolParameterTestconditionsMin.
Typ.
Max.
UnitVOOutputvoltage232425VVOOutputvoltageIO=1A,VI=27V22.
82425.
2VΔVOLineregulationVI=27to38V480mVVI=30to36V240ΔVOLoadregulationIO=20mAto1.
5A480mVIO=2A300IQQuiescentcurrent8mAΔIQQuiescentcurrentchangeIO=20mAto1A0.
5mAVI=27to38V,IO=20mA1ΔVO/ΔTOutputvoltagedriftIO=5mA,TJ=0°Cto70°C-1.
5mV/°CeNOutputnoisevoltageB=10Hzto100kHz170VSVRSupplyvoltagerejectionf=120Hz42(1)dBVIOperatinginputvoltageIO≤1A27VROOutputresistancef=1kHz28mΩIscShortcircuitcurrentVI=27V500mAIscpShortcircuitpeakcurrent3A1.
Guaranteedbydesign.
DocID2148Rev817/35L78STypicalperformance356TypicalperformanceFigure8.
Dropoutvoltagevs.
junctiontemperatureFigure9.
Peakoutputcurrentvs.
input/outputdifferentialvoltageFigure10.
Outputimpedancevs.
frequencyFigure11.
Outputvoltagevs.
junctiontemperatureTypicalperformanceL78S18/35DocID2148Rev8Figure12.
Supplyvoltagerejectionvs.
frequencyFigure13.
Quiescentcurrentvs.
junctiontemperatureFigure14.
LoadtransientresponseFigure15.
LinetransientresponseFigure16.
Quiescentcurrentvs.
inputvoltageDocID2148Rev819/35L78STypicalperformance351.
Althoughnooutputcapacitorisneedforstability,itdoesimprovetransientresponse.
2.
Requiredifregulatorislocatedanappreciabledistancefrompowersupplyfilter.
Figure17.
FixedoutputregulatorFigure18.
Constantcurrentregulator,29;;;;5,G4Figure19.
Circuitforincreasingoutputvoltage,5,G929;;;;555,G54TypicalperformanceL78S20/35DocID2148Rev8Figure20.
Adjustableoutputregulator(7to30V)Figure21.
0.
5to10VregulatorVO=VXXR4/R1DocID2148Rev821/35L78STypicalperformance35Figure22.
Highcurrentvoltageregulator5,2,5(*4,5(*B9BBBB%(4B9%(45BBBBBBBBBBBBBB,5(4,4E44Figure23.
Highoutputcurrentwithshortcircuitprotection56&6&9%(%(44,6&6&4TypicalperformanceL78S22/35DocID2148Rev8Figure24.
Trackingvoltageregulator4Figure25.
PositiveandnegativeregulatorDocID2148Rev823/35L78STypicalperformance35Figure26.
NegativeoutputvoltagecircuitFigure27.
SwitchingregulatorFigure28.
Highinputvoltagecircuit9,19,99=9%(%(4TypicalperformanceL78S24/35DocID2148Rev8Figure29.
Highinputvoltagecircuit4Figure30.
Highoutputvoltageregulator4Figure31.
Highinputandoutputvoltage929;;;;9=4DocID2148Rev825/35L78STypicalperformance35Figure32.
Reducingpowerdissipationwithdroppingresistor999995BB,PL,PLBBBBBQQBBBBBBB;;;;BBBBB'52BBBBBBB3PD[PD[BBBBBB,2PD[[,GPD[PD[4Figure33.
Remoteshutdown4TypicalperformanceL78S26/35DocID2148Rev8Note:Thecircuitperformswellupto100kHz.
Note:Q2isconnectedasadiodeinordertocompensatethevariationoftheQ1VBEwiththetemperature.
CallowsaslowrisetimeoftheVO.
Figure34.
PowerAMmodulator(unityvoltagegain,IO≤1A)4Figure35.
Adjustableoutputvoltagewithtemperaturecompensation929;;559%(4DocID2148Rev827/35L78STypicalperformance351.
Applicationwithhighcapacitanceloadsandanoutputvoltagegreaterthan6voltsneedanexternaldiode(seeFigure30onpage24)toprotectthedeviceagainstinputshortcircuit.
Inthiscasetheinputvoltagefallsrapidlywhiletheoutputvoltagedecreaseslowly.
ThecapacitancedischargesbymeansoftheBase-Emitterjunctionoftheseriespasstransistorintheregulator.
Iftheenergyissufficientlyhigh,thetransistormaybedestroyed.
Theexternaldiodeby-passesthecurrentfromtheICtoground.
Figure36.
Lightcontrollers(VOmin=VXX+VBE)92ULVHVZKHQWKHOLJKWJRHVXS92IDOOVZKHQWKHOLJKWJRHVXSFigure37.
Protectionagainstinputshort-circuitwithhighcapacitanceloads4PackagemechanicaldataL78S28/35DocID2148Rev87PackagemechanicaldataInordertomeetenvironmentalrequirements,SToffersthesedevicesindifferentgradesofECOPACKpackages,dependingontheirlevelofenvironmentalcompliance.
ECOPACKspecifications,gradedefinitionsandproductstatusareavailableat:www.
st.
com.
ECOPACKisanSTtrademark.
DocID2148Rev829/35L78SPackagemechanicaldata35Figure38.
TO-220(dualgauge)drawingBW\SH$B5HYB7PackagemechanicaldataL78S30/35DocID2148Rev8Table12.
TO-220(dualgauge)mechanicaldataDim.
mmMin.
Typ.
Max.
A4.
404.
60b0.
610.
88b11.
141.
70c0.
480.
70D15.
2515.
75D11.
27E1010.
40e2.
402.
70e14.
955.
15F1.
231.
32H16.
206.
60J12.
402.
72L1314L13.
503.
93L2016.
40L3028.
90P3.
753.
85Q2.
652.
95DocID2148Rev831/35L78SPackagemechanicaldata35Figure39.
TO-220SG(singlegauge)drawingBUHY'PackagemechanicaldataL78S32/35DocID2148Rev8Table13.
TO-220SG(singlegauge)mechanicaldataDim.
mmMin.
Typ.
Max.
A4.
404.
60b0.
610.
88b11.
141.
70c0.
480.
70D15.
2515.
75E1010.
40e2.
402.
70e14.
955.
15F0.
510.
60H16.
206.
60J12.
402.
72L1314L13.
503.
93L2016.
40L3028.
90P3.
753.
85Q2.
652.
95DocID2148Rev833/35L78SPackagingmechanicaldata358PackagingmechanicaldataFigure40.
TubeforTO-220(dualgauge)(mm.
)Figure41.
TubeforTO-220(singlegauge)(mm.
)RevisionhistoryL78S34/35DocID2148Rev89RevisionhistoryTable14.
DocumentrevisionhistoryDateRevisionChanges07-Sep-20062Ordercodesupdated.
20-Mar-20083Added:Table1onpage1.
22-Mar-20104Added:Table20onpage32,Figure38onpage33,Figure39onpage34,Figure40andFigure41onpage33.
08-Feb-20125Added:ordercodesL78S05CV-DG,L78S12CV-DGandL78S15CV-DGTable13onpage35.
09-Mar-20126Added:ordercodesL78S09CV-DGTable13onpage35.
15-May-20127Added:ordercodesL78S75CV-DGandL78S10CV-DGTable13onpage35.
10-Mar-20148PartnumbersL78SxxandL78SxxCchangedtoL78S.
Modifiedthetitle,thefeaturesandthedescriptionincoverpage.
RemovedTO-3package.
UpdatedTable1:Devicesummary,Section2:Pinconfiguration,Section3:Maximumratings,Section4:Testcircuits,Section5:Electricalcharacteristics,Section6:Typicalperformance,Section7:Packagemechanicaldata,Section9:Ordercodes.
AddedSection8:Packagingmechanicaldata.
Minortextchanges.
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comMouserElectronicsAuthorizedDistributorClicktoViewPricing,Inventory,Delivery&LifecycleInformation:STMicroelectronics:L78S09CVL78S10CVL78S18CVL78S24CVL78S75CVL78S05CVL78S12CVL78S15CVL78S05CV-DGL78S09CV-DGL78S10CV-DGL78S12CV-DGL78S15CV-DGL78S75CV-DG
March2014DocID2148Rev81/35L78S2ApositivevoltageregulatorICDatasheet-productiondataFeaturesOutputcurrentupto2AOutputvoltagesof5;7.
5;9;10;12;15;18;24VThermalprotectionShortcircuitprotectionOutputtransitionSOAprotectionDescriptionTheL78Sseriesofthree-terminalpositiveregulatorsisavailableinTO-220packageandseveralfixedoutputvoltages,makingitusefulinawiderangeofapplications.
Theseregulatorscanprovidelocalon-cardregulation,eliminatingthedistributionproblemsassociatedwithsinglepointregulation.
Eachtypeembedsinternalcurrentlimiting,thermalshut-downandsafeareaprotection,makingitessentiallyindestructible.
Ifadequateheatsinkingisprovided,theycandeliverover2Aoutputcurrent.
Althoughdesignedprimarilyasfixedvoltageregulators,thesedevicescanbeusedwithexternalcomponentstoobtainadjustablevoltagesandcurrents.
TO-220Table1.
DevicesummaryPartnumbersTO-220packagesOutputvoltageDualgaugeSinglegaugeL78S05CL78S05CV-DGL78S05CV5VL78S75CL78S75CV-DGL78S75CV7.
5VL78S09CL78S09CV-DGL78S09CV9VL78S10CL78S10CV-DGL78S10CV10VL78S12CL78S12CV-DGL78S12CV12VL78S15CL78S15CV-DGL78S15CV15VL78S18CL78S18CV18VL78S24CL78S24CV24Vwww.
st.
comContentsL78S2/35DocID2148Rev8Contents1Diagram52Pinconfiguration63Maximumratings74Testcircuits85Electricalcharacteristics96Typicalperformance177Packagemechanicaldata288Packagingmechanicaldata339Revisionhistory34DocID2148Rev83/35L78SListoftables35ListoftablesTable1.
Devicesummary1Table2.
Absolutemaximumratings7Table3.
Thermaldata.
7Table4.
ElectricalcharacteristicsofL78S05C9Table5.
ElectricalcharacteristicsofL78S75C10Table6.
ElectricalcharacteristicsofL78S09C11Table7.
ElectricalcharacteristicsofL78S10C12Table8.
ElectricalcharacteristicsofL78S12C13Table9.
ElectricalcharacteristicsofL78S15C14Table10.
ElectricalcharacteristicsofL78S18C15Table11.
ElectricalcharacteristicsofL78S24C16Table12.
TO-220(dualgauge)mechanicaldata30Table13.
TO-220SG(singlegauge)mechanicaldata32Table14.
Documentrevisionhistory34ListoffiguresL78S4/35DocID2148Rev8ListoffiguresFigure1.
Blockdiagram5Figure2.
Pinconnections(topview)6Figure3.
Schematicdiagram6Figure4.
Applicationcircuits7Figure5.
DCparameter8Figure6.
Loadregulation8Figure7.
Ripplerejection8Figure8.
Dropoutvoltagevs.
junctiontemperature17Figure9.
Peakoutputcurrentvs.
input/outputdifferentialvoltage.
17Figure10.
Outputimpedancevs.
frequency17Figure11.
Outputvoltagevs.
junctiontemperature17Figure12.
Supplyvoltagerejectionvs.
frequency18Figure13.
Quiescentcurrentvs.
junctiontemperature18Figure14.
Loadtransientresponse18Figure15.
Linetransientresponse18Figure16.
Quiescentcurrentvs.
inputvoltage18Figure17.
Fixedoutputregulator.
19Figure18.
Constantcurrentregulator19Figure19.
Circuitforincreasingoutputvoltage19Figure20.
Adjustableoutputregulator(7to30V)20Figure21.
0.
5to10Vregulator20Figure22.
Highcurrentvoltageregulator21Figure23.
Highoutputcurrentwithshortcircuitprotection21Figure24.
Trackingvoltageregulator22Figure25.
Positiveandnegativeregulator22Figure26.
Negativeoutputvoltagecircuit23Figure27.
Switchingregulator23Figure28.
Highinputvoltagecircuit.
23Figure29.
Highinputvoltagecircuit.
24Figure30.
Highoutputvoltageregulator24Figure31.
Highinputandoutputvoltage24Figure32.
Reducingpowerdissipationwithdroppingresistor.
25Figure33.
Remoteshutdown.
25Figure34.
PowerAMmodulator(unityvoltagegain,IO1A)26Figure35.
Adjustableoutputvoltagewithtemperaturecompensation26Figure36.
Lightcontrollers(VOmin=VXX+VBE)27Figure37.
Protectionagainstinputshort-circuitwithhighcapacitanceloads27Figure38.
TO-220(dualgauge)drawing.
29Figure39.
TO-220SG(singlegauge)drawing31Figure40.
TubeforTO-220(dualgauge)(mm.
33Figure41.
TubeforTO-220(singlegauge)(mm.
33DocID2148Rev85/35L78SDiagram351DiagramFigure1.
BlockdiagramPinconfigurationL78S6/35DocID2148Rev82PinconfigurationFigure2.
Pinconnections(topview)72*5281'*5281'Figure3.
SchematicdiagramDocID2148Rev87/35L78SMaximumratings353MaximumratingsNote:Absolutemaximumratingsarethosevaluesbeyondwhichdamagetothedevicemayoccur.
Functionaloperationundertheseconditionisnotimplied.
Table2.
AbsolutemaximumratingsSymbolParameterValueUnitVIDCinputvoltageforVO=5to18V35VforVO=24V40IOOutputcurrentInternallylimitedPDPowerdissipationInternallylimitedTSTGStoragetemperaturerange-65to150°CTOPOperatingjunctiontemperaturerange0to150°CTable3.
ThermaldataSymbolParameterTO-220UnitRthJCThermalresistancejunction-case5°C/WRthJAThermalresistancejunction-ambient50°C/WFigure4.
Applicationcircuits4TestcircuitsL78S8/35DocID2148Rev84TestcircuitsFigure5.
DCparameter4Figure6.
Loadregulation4Figure7.
Ripplerejection4DocID2148Rev89/35L78SElectricalcharacteristics355ElectricalcharacteristicsRefertothetestcircuits,TJ=25°C,VI=10V,IO=500mA,unlessotherwisespecified.
Table4.
ElectricalcharacteristicsofL78S05CSymbolParameterTestconditionsMin.
Typ.
Max.
UnitVOOutputvoltage4.
855.
2VVOOutputvoltageIO=1A,VI=7V4.
7555.
25VΔVOLineregulationVI=7to25V100mVVI=8to25V50ΔVOLoadregulationIO=20mAto1.
5A100mVIO=2A80IQQuiescentcurrent8mAΔIQQuiescentcurrentchangeIO=20mAto1A0.
5mAVI=7to25V,IO=20mA1.
3ΔVO/ΔTOutputvoltagedriftIO=5mA,TJ=0°Cto70°C-1.
1mV/°CeNOutputnoisevoltageB=10Hzto100kHz40VSVRSupplyvoltagerejectionf=120Hz54(1)dBVIOperatinginputvoltageIO≤1A8VROOutputresistancef=1kHz17mΩIscShortcircuitcurrentVI=27V500mAIscpShortcircuitpeakcurrent3A1.
Guaranteedbydesign.
ElectricalcharacteristicsL78S10/35DocID2148Rev8Refertothetestcircuits,TJ=25°C,VI=12.
5V,IO=500mA,unlessotherwisespecified.
Table5.
ElectricalcharacteristicsofL78S75CSymbolParameterTestconditionsMin.
Typ.
Max.
UnitVOOutputvoltage7.
157.
57.
9VVOOutputvoltageIO=1A,VI=9.
5V7.
17.
57.
95VΔVOLineregulationVI=9.
5to25V120mVVI=10.
5to20V60ΔVOLoadregulationIO=20mAto1.
5A140mVIO=2A100IQQuiescentcurrent8mAΔIQQuiescentcurrentchangeIO=20mAto1A0.
5mAVI=9.
5to25V,IO=20mA1.
3ΔVO/ΔTOutputvoltagedriftIO=5mA,TJ=0°Cto70°C-0.
8mV/°CeNOutputnoisevoltageB=10Hzto100kHz52VSVRSupplyvoltagerejectionf=120Hz48(1)dBVIOperatinginputvoltageIO≤1A10.
5VROOutputresistancef=1kHz16mΩIscShortcircuitcurrentVI=27V500mAIscpShortcircuitpeakcurrent3A1.
Guaranteedbydesign.
DocID2148Rev811/35L78SElectricalcharacteristics35Refertothetestcircuits,TJ=25°C,VI=14V,IO=500mA,unlessotherwisespecified.
Table6.
ElectricalcharacteristicsofL78S09CSymbolParameterTestconditionsMin.
Typ.
Max.
UnitVOOutputvoltage8.
6599.
35VVOOutputvoltageIO=1A,VI=11V8.
699.
4VΔVOLineregulationVI=11to25V130mVVI=11to20V65ΔVOLoadregulationIO=20mAto1.
5A170mVIO=2A100IQQuiescentcurrent8mAΔIQQuiescentcurrentchangeIO=20mAto1A0.
5mAVI=11to25V,IO=20mA1.
3ΔVO/ΔTOutputvoltagedriftIO=5mA,TJ=0°Cto70°C-1mV/°CeNOutputnoisevoltageB=10Hzto100kHz60VSVRSupplyvoltagerejectionf=120Hz47(1)dBVIOperatinginputvoltageIO≤1A12VROOutputresistancef=1kHz17mΩIscShortcircuitcurrentVI=27V500mAIscpShortcircuitpeakcurrent3A1.
Guaranteedbydesign.
ElectricalcharacteristicsL78S12/35DocID2148Rev8Refertothetestcircuits,TJ=25°C,VI=15V,IO=500mA,unlessotherwisespecified.
Table7.
ElectricalcharacteristicsofL78S10CSymbolParameterTestconditionsMin.
Typ.
Max.
UnitVOOutputvoltage9.
51010.
5VVOOutputvoltageIO=1A,VI=12.
5V9.
41010.
6VΔVOLineregulationVI=12.
5to30V200mVVI=14to22V100ΔVOLoadregulationIO=20mAto1.
5A240mVIO=2A150IQQuiescentcurrent8mAΔIQQuiescentcurrentchangeIO=20mAto1A0.
5mAVI=12.
5to30V,IO=20mA1ΔVO/ΔTOutputvoltagedriftIO=5mA,TJ=0°Cto70°C-1mV/°CeNOutputnoisevoltageB=10Hzto100kHz65VSVRSupplyvoltagerejectionf=120Hz47(1)dBVIOperatinginputvoltageIO≤1A13VROOutputresistancef=1kHz17mΩIscShortcircuitcurrentVI=27V500mAIscpShortcircuitpeakcurrent3A1.
Guaranteedbydesign.
DocID2148Rev813/35L78SElectricalcharacteristics35Refertothetestcircuits,TJ=25°C,VI=19V,IO=500mA,unlessotherwisespecified.
Table8.
ElectricalcharacteristicsofL78S12CSymbolParameterTestconditionsMin.
Typ.
Max.
UnitVOOutputvoltage11.
51212.
5VVOOutputvoltageIO=1A,VI=14.
5V11.
41212.
6VΔVOLineregulationVI=14.
5to30V240mVVI=16to22V120ΔVOLoadregulationIO=20mAto1.
5A240mVIO=2A150IQQuiescentcurrent8mAΔIQQuiescentcurrentchangeIO=20mAto1A0.
5mAVI=14.
5to30V,IO=20mA1ΔVO/ΔTOutputvoltagedriftIO=5mA,TJ=0°Cto70°C-1mV/°CeNOutputnoisevoltageB=10Hzto100kHz75VSVRSupplyvoltagerejectionf=120Hz47(1)dBVIOperatinginputvoltageIO≤1A15VROOutputresistancef=1kHz18mΩIscShortcircuitcurrentVI=27V500mAIscpShortcircuitpeakcurrent3A1.
Guaranteedbydesign.
ElectricalcharacteristicsL78S14/35DocID2148Rev8Refertothetestcircuits,TJ=25°C,VI=23V,IO=500mA,unlessotherwisespecified.
Table9.
ElectricalcharacteristicsofL78S15CSymbolParameterTestconditionsMin.
Typ.
Max.
UnitVOOutputvoltage14.
41515.
6VVOOutputvoltageIO=1A,VI=17.
5V14.
251515.
75VΔVOLineregulationVI=17.
5to30V300mVVI=20to26V150ΔVOLoadregulationIO=20mAto1.
5A300mVIO=2A150IQQuiescentcurrent8mAΔIQQuiescentcurrentchangeIO=20mAto1A0.
5mAVI=17.
5to30V,IO=20mA1ΔVO/ΔTOutputvoltagedriftIO=5mA,TJ=0°Cto70°C-1mV/°CeNOutputnoisevoltageB=10Hzto100kHz90VSVRSupplyvoltagerejectionf=120Hz46(1)dBVIOperatinginputvoltageIO≤1A18VROOutputresistancef=1kHz19mΩIscShortcircuitcurrentVI=27V500mAIscpShortcircuitpeakcurrent3A1.
Guaranteedbydesign.
DocID2148Rev815/35L78SElectricalcharacteristics35Refertothetestcircuits,TJ=25°C,VI=26V,IO=500mA,unlessotherwisespecified.
Table10.
ElectricalcharacteristicsofL78S18CSymbolParameterTestconditionsMin.
Typ.
Max.
UnitVOOutputvoltage17.
11818.
9VVOOutputvoltageIO=1A,VI=20.
5V171819VΔVOLineregulationVI=20.
5to30V360mVVI=22to28V180ΔVOLoadregulationIO=20mAto1.
5A360mVIO=2A200IQQuiescentcurrent8mAΔIQQuiescentcurrentchangeIO=20mAto1A0.
5mAVI=20.
5to30V,IO=20mA1ΔVO/ΔTOutputvoltagedriftIO=5mA,TJ=0°Cto70°C-1mV/°CeNOutputnoisevoltageB=10Hzto100kHz110VSVRSupplyvoltagerejectionf=120Hz43(1)dBVIOperatinginputvoltageIO≤1A21VROOutputresistancef=1kHz22mΩIscShortcircuitcurrentVI=27V500mAIscpShortcircuitpeakcurrent3A1.
Guaranteedbydesign.
ElectricalcharacteristicsL78S16/35DocID2148Rev8Refertothetestcircuits,TJ=25°C,VI=33V,IO=500mA,unlessotherwisespecified.
Table11.
ElectricalcharacteristicsofL78S24CSymbolParameterTestconditionsMin.
Typ.
Max.
UnitVOOutputvoltage232425VVOOutputvoltageIO=1A,VI=27V22.
82425.
2VΔVOLineregulationVI=27to38V480mVVI=30to36V240ΔVOLoadregulationIO=20mAto1.
5A480mVIO=2A300IQQuiescentcurrent8mAΔIQQuiescentcurrentchangeIO=20mAto1A0.
5mAVI=27to38V,IO=20mA1ΔVO/ΔTOutputvoltagedriftIO=5mA,TJ=0°Cto70°C-1.
5mV/°CeNOutputnoisevoltageB=10Hzto100kHz170VSVRSupplyvoltagerejectionf=120Hz42(1)dBVIOperatinginputvoltageIO≤1A27VROOutputresistancef=1kHz28mΩIscShortcircuitcurrentVI=27V500mAIscpShortcircuitpeakcurrent3A1.
Guaranteedbydesign.
DocID2148Rev817/35L78STypicalperformance356TypicalperformanceFigure8.
Dropoutvoltagevs.
junctiontemperatureFigure9.
Peakoutputcurrentvs.
input/outputdifferentialvoltageFigure10.
Outputimpedancevs.
frequencyFigure11.
Outputvoltagevs.
junctiontemperatureTypicalperformanceL78S18/35DocID2148Rev8Figure12.
Supplyvoltagerejectionvs.
frequencyFigure13.
Quiescentcurrentvs.
junctiontemperatureFigure14.
LoadtransientresponseFigure15.
LinetransientresponseFigure16.
Quiescentcurrentvs.
inputvoltageDocID2148Rev819/35L78STypicalperformance351.
Althoughnooutputcapacitorisneedforstability,itdoesimprovetransientresponse.
2.
Requiredifregulatorislocatedanappreciabledistancefrompowersupplyfilter.
Figure17.
FixedoutputregulatorFigure18.
Constantcurrentregulator,29;;;;5,G4Figure19.
Circuitforincreasingoutputvoltage,5,G929;;;;555,G54TypicalperformanceL78S20/35DocID2148Rev8Figure20.
Adjustableoutputregulator(7to30V)Figure21.
0.
5to10VregulatorVO=VXXR4/R1DocID2148Rev821/35L78STypicalperformance35Figure22.
Highcurrentvoltageregulator5,2,5(*4,5(*B9BBBB%(4B9%(45BBBBBBBBBBBBBB,5(4,4E44Figure23.
Highoutputcurrentwithshortcircuitprotection56&6&9%(%(44,6&6&4TypicalperformanceL78S22/35DocID2148Rev8Figure24.
Trackingvoltageregulator4Figure25.
PositiveandnegativeregulatorDocID2148Rev823/35L78STypicalperformance35Figure26.
NegativeoutputvoltagecircuitFigure27.
SwitchingregulatorFigure28.
Highinputvoltagecircuit9,19,99=9%(%(4TypicalperformanceL78S24/35DocID2148Rev8Figure29.
Highinputvoltagecircuit4Figure30.
Highoutputvoltageregulator4Figure31.
Highinputandoutputvoltage929;;;;9=4DocID2148Rev825/35L78STypicalperformance35Figure32.
Reducingpowerdissipationwithdroppingresistor999995BB,PL,PLBBBBBQQBBBBBBB;;;;BBBBB'52BBBBBBB3PD[PD[BBBBBB,2PD[[,GPD[PD[4Figure33.
Remoteshutdown4TypicalperformanceL78S26/35DocID2148Rev8Note:Thecircuitperformswellupto100kHz.
Note:Q2isconnectedasadiodeinordertocompensatethevariationoftheQ1VBEwiththetemperature.
CallowsaslowrisetimeoftheVO.
Figure34.
PowerAMmodulator(unityvoltagegain,IO≤1A)4Figure35.
Adjustableoutputvoltagewithtemperaturecompensation929;;559%(4DocID2148Rev827/35L78STypicalperformance351.
Applicationwithhighcapacitanceloadsandanoutputvoltagegreaterthan6voltsneedanexternaldiode(seeFigure30onpage24)toprotectthedeviceagainstinputshortcircuit.
Inthiscasetheinputvoltagefallsrapidlywhiletheoutputvoltagedecreaseslowly.
ThecapacitancedischargesbymeansoftheBase-Emitterjunctionoftheseriespasstransistorintheregulator.
Iftheenergyissufficientlyhigh,thetransistormaybedestroyed.
Theexternaldiodeby-passesthecurrentfromtheICtoground.
Figure36.
Lightcontrollers(VOmin=VXX+VBE)92ULVHVZKHQWKHOLJKWJRHVXS92IDOOVZKHQWKHOLJKWJRHVXSFigure37.
Protectionagainstinputshort-circuitwithhighcapacitanceloads4PackagemechanicaldataL78S28/35DocID2148Rev87PackagemechanicaldataInordertomeetenvironmentalrequirements,SToffersthesedevicesindifferentgradesofECOPACKpackages,dependingontheirlevelofenvironmentalcompliance.
ECOPACKspecifications,gradedefinitionsandproductstatusareavailableat:www.
st.
com.
ECOPACKisanSTtrademark.
DocID2148Rev829/35L78SPackagemechanicaldata35Figure38.
TO-220(dualgauge)drawingBW\SH$B5HYB7PackagemechanicaldataL78S30/35DocID2148Rev8Table12.
TO-220(dualgauge)mechanicaldataDim.
mmMin.
Typ.
Max.
A4.
404.
60b0.
610.
88b11.
141.
70c0.
480.
70D15.
2515.
75D11.
27E1010.
40e2.
402.
70e14.
955.
15F1.
231.
32H16.
206.
60J12.
402.
72L1314L13.
503.
93L2016.
40L3028.
90P3.
753.
85Q2.
652.
95DocID2148Rev831/35L78SPackagemechanicaldata35Figure39.
TO-220SG(singlegauge)drawingBUHY'PackagemechanicaldataL78S32/35DocID2148Rev8Table13.
TO-220SG(singlegauge)mechanicaldataDim.
mmMin.
Typ.
Max.
A4.
404.
60b0.
610.
88b11.
141.
70c0.
480.
70D15.
2515.
75E1010.
40e2.
402.
70e14.
955.
15F0.
510.
60H16.
206.
60J12.
402.
72L1314L13.
503.
93L2016.
40L3028.
90P3.
753.
85Q2.
652.
95DocID2148Rev833/35L78SPackagingmechanicaldata358PackagingmechanicaldataFigure40.
TubeforTO-220(dualgauge)(mm.
)Figure41.
TubeforTO-220(singlegauge)(mm.
)RevisionhistoryL78S34/35DocID2148Rev89RevisionhistoryTable14.
DocumentrevisionhistoryDateRevisionChanges07-Sep-20062Ordercodesupdated.
20-Mar-20083Added:Table1onpage1.
22-Mar-20104Added:Table20onpage32,Figure38onpage33,Figure39onpage34,Figure40andFigure41onpage33.
08-Feb-20125Added:ordercodesL78S05CV-DG,L78S12CV-DGandL78S15CV-DGTable13onpage35.
09-Mar-20126Added:ordercodesL78S09CV-DGTable13onpage35.
15-May-20127Added:ordercodesL78S75CV-DGandL78S10CV-DGTable13onpage35.
10-Mar-20148PartnumbersL78SxxandL78SxxCchangedtoL78S.
Modifiedthetitle,thefeaturesandthedescriptionincoverpage.
RemovedTO-3package.
UpdatedTable1:Devicesummary,Section2:Pinconfiguration,Section3:Maximumratings,Section4:Testcircuits,Section5:Electricalcharacteristics,Section6:Typicalperformance,Section7:Packagemechanicaldata,Section9:Ordercodes.
AddedSection8:Packagingmechanicaldata.
Minortextchanges.
DocID2148Rev835/35L78S35PleaseReadCarefully:InformationinthisdocumentisprovidedsolelyinconnectionwithSTproducts.
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Purchasersaresolelyresponsibleforthechoice,selectionanduseoftheSTproductsandservicesdescribedherein,andSTassumesnoliabilitywhatsoeverrelatingtothechoice,selectionoruseoftheSTproductsandservicesdescribedherein.
Nolicense,expressorimplied,byestoppelorotherwise,toanyintellectualpropertyrightsisgrantedunderthisdocument.
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