LM2825HN-ADJ/NOPB

Texas Instruments

Integrated Power Supply 1A DC-DC Converter

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www.ti.com SNVS127C –MAY 1997–REVISED APRIL 2013 LM2825IntegratedPowerSupply1ADC-DCConverter Check forSamples: LM2825 1FEATURES DESCRIPTION The LM2825 isa complete1A DC-DC Buck converter• Minimum Design Time Required packaged ina 24-leadmolded Dual-In-Lineintegrated• 3.3V,5V and 12V FixedOutput Versions circuitpackage.

Two AdjustableVersionsAllow 1.23Vto15V Containedwithinthe package are allthe activeandOutputs passivecomponents fora highefficiencystep-down• Wide InputVoltageRange, up to40V (buck)switchingregulator.Availablein fixedoutput voltagesof 3.3V, 5V and 12V, as well as two• Low-Power Standby Mode, IQ Typically65 μA adjustableversions,thesedevicescan provideup to• High Efficiency,Typically80% 1A of load currentwith fullyensured electrical• ±4% Output VoltageTolerance specifications.
ExcellentLineand Load Regulation Self-contained,thisconverterisalsofullyprotected• TTL Shutdown Capability/ProgrammableSoft- from outputfaultconditions,such as excessiveload Start current,shortcircuits,orexcessivetemperatures.
Thermal Shutdown and CurrentLimit Protection
−40°C to+85°C Ambient Temperature Range

APPLICATIONS

Simple High-EfficiencyStep-Down (Buck) Regulator
On-Card SwitchingRegulators
EfficientPre-RegulatorforLinearRegulators Standard Application• DistributedPower Systems (Fixedoutputvoltageversions)• DC/DC Module Replacement HIGHLIGHTS
No ExternalComponents Required (Fixed Output VoltageVersions)
IntegratedCircuitReliability
MTBF Over 20 MillionHours
RadiatedEMI Meets Class B Stipulatedby RadiatedEMI CISPR 22 Radiated emission of electromagneticfieldsis
High Power Density,35 W/in3 measured at 10m distance.The emissionlevelsare withintheClassB limitsstipulatedby CISPR 22.• 24-pinPDIP Package Profile(1.25x 0.54x 0.26 Inches) 30....230MHz 30 dB μV/m 230....1000MHz 37 dB μV/m 1....10GHz 46 dB μV/m Pleasebe aware thatan importantnoticeconcerningavailability,standardwarranty,and use incriticalapplicationsof Texas Instrumentssemiconductorproductsand disclaimerstheretoappearsattheend ofthisdatasheet. PRODUCTION DATA informationiscurrentas ofpublicationdate. Copyright© 1997–2013,Texas InstrumentsIncorporatedProductsconform to specificationsper the terms of the Texas Instrumentsstandardwarranty.Productionprocessingdoes not necessarilyincludetestingofallparameters.

SNVS127C –MAY 1997–REVISED APRIL 2013 www.ti.com Connection Diagram “NC (Do notuse)”pins:See Figure25 Figure1. PDIP Package Top View See Package Number NFL These deviceshave limitedbuilt-inESD protection.The leadsshouldbe shortedtogetherorthedeviceplacedinconductivefoam duringstorageorhandlingtopreventelectrostaticdamage totheMOS gates. AbsoluteMaximum Ratings(1)(2) Maximum InputSupply(VIN) +45V SD/SS PinInputVoltage(3) 6V OutputPinVoltage (3.3V,5.0Vand ADJ) −1V ≤ V ≤ 9V (12V and H-ADJ) −1V ≤ V ≤ 16V ADJ PinVoltage(ADJ,H-ADJ only) −0.3V≤ V ≤ 25V Power Dissipation InternallyLimited StorageTemperatureRange −40°C to+125°C ESD Susceptibility Human Body Model(4) 2 kV Lead Temperature(Soldering10 sec.) 260°C (1) AbsoluteMaximum Ratingsindicatelimitsbeyond whichdamage tothedevicemay occur.OperatingRatingsindicateconditionsfor whichthedeviceisintendedtobe functional,butdo notensurespecificperformancelimits.Forensuredspecificationsand test conditions,see theElectricalCharacteristics. (2) IfMilitary/Aerospacespecifieddevicesarerequired,pleasecontacttheTexas InstrumentsSalesOffice/Distributorsforavailabilityand specifications. (3) Voltageinternallyclamped.Ifclamp voltageisexceeded,limitcurrenttoa maximum of5 mA. (4) The human body model isa 100 pF capacitordischargedthrougha 1.5kresistorintoeach pin. OperatingRatings AmbientTemperatureRange −40°C ≤ TA ≤ +85°C JunctionTemperatureRange −40°C ≤ TJ ≤ +125°C InputSupplyVoltage(3.3Vversion) 4.75Vto40V InputSupplyVoltage(5V version) 7V to40V InputSupplyVoltage(12V version) 15V to40V InputSupplyVoltage(-ADJ,H-ADJ) 4.5Vto40V

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www.ti.com SNVS127C –MAY 1997–REVISED APRIL 2013 LM2825-3.3ElectricalCharacteristics(1) SpecificationswithstandardtypefaceareforTA = 25°C, and thosewithboldfacetypeapplyoverfullOperating Temperature Range .TestCircuit,see Figure17. Symbol Parameter Conditions LM2825-3.3 Units (Limits)Typical(2) Limit(3) VOUT OutputVoltage 4.75V≤ VIN ≤ 40V,0.1A ≤ ILOAD ≤ 1A 3.3 V 3.168/3.135 V(min) 3.432/3.465 V(max) LineRegulation 4.75V≤ VIN ≤ 40V 1.5 mV ILOAD = 100 mA Load Regulation 0.1A≤ ILOAD ≤ 1A 8 mV VIN = 12V OutputRippleVoltage VIN = 12V,ILOAD = 1A 40 mV p-p η Efficiency VIN = 12V,ILOAD = 0.5A 75 % (1) When theLM2825 isused as shown inFigure17 testcircuit,systemperformancewillbe as shown inElectricalCharacteristics. (2) Typicalnumbers areat25°C and representthemost likelynorm. (3) Alllimitsensuredatroom temperature(standardtypeface)and attemperatureextremes(boldtypeface)when outputcurrentislimited tothevaluegiveninthetemperaturederatingcurves.See theApplicationInformationsectionforcurves.Alllimitsattemperature extremesareensuredusingstandardStatisticalQualityControl(SQC) methods.Alllimitsareused tocalculateAverageOutgoing QualityLevel(AOQL). LM2825-5.0ElectricalCharacteristics(1) SpecificationswithstandardtypefaceareforTA = 25°C, and thosewithboldfacetypeapplyoverfullOperating Temperature Range .TestCircuit,see Figure17. Symbol Parameter Conditions LM2825-5.0 Units (Limits)Typical(2) Limit(3) VOUT OutputVoltage 7V ≤ VIN ≤ 40V,0.1A≤ ILOAD ≤ 1A 5.0 V 4.800/4.750 V(min) 5.200/5.250 V(max) LineRegulation 7V ≤ VIN ≤ 40V 2.7 mV ILOAD = 100 mA Load Regulation 0.1A≤ ILOAD ≤ 1A 8 mV VIN = 12V OutputRippleVoltage VIN = 12V,ILOAD = 1A 40 mV p-p η Efficiency VIN = 12V,ILOAD = 0.5A 80 % (1) When theLM2825 isused as shown inFigure17 testcircuit,systemperformancewillbe as shown inElectricalCharacteristics. (2) Typicalnumbers areat25°C and representthemost likelynorm. (3) Alllimitsensuredatroom temperature(standardtypeface)and attemperatureextremes(boldtypeface)when outputcurrentislimited tothevaluegiveninthetemperaturederatingcurves.See theApplicationInformationsectionforcurves.Alllimitsattemperature extremesareensuredusingstandardStatisticalQualityControl(SQC) methods.Alllimitsareused tocalculateAverageOutgoing QualityLevel(AOQL). Copyright© 1997–2013,Texas InstrumentsIncorporated SubmitDocumentationFeedback 3 ProductFolderLinks:LM2825

SNVS127C –MAY 1997–REVISED APRIL 2013 www.ti.com LM2825-12 ElectricalCharacteristics(1) SpecificationswithstandardtypefaceareforTA = 25°C, and thosewithboldfacetypeapplyoverfullOperating Temperature Range .TestCircuit,see Figure17. Symbol Parameter Conditions LM2825-12 Units (Limits)Typical(2) Limit(3) VOUT OutputVoltage 15V ≤ VIN ≤ 40V,0.1A≤ ILOAD ≤ 0.75A 12.0 V 11.52/11.40 V(min) 12.48/12.60 V(max) LineRegulation 15V ≤ VIN ≤ 40V 8.5 mV ILOAD = 100 mA Load Regulation 0.1A≤ ILOAD ≤ 0.75A 12 mV VIN = 24V OutputRippleVoltage VIN = 24V,ILOAD = 1A 100 mV p-p η Efficiency VIN = 24V,ILOAD = 0.5A 87 % (1) When theLM2825 isused as shown inFigure17 testcircuit,systemperformancewillbe as shown inElectricalCharacteristics. (2) Typicalnumbers areat25°C and representthemost likelynorm. (3) Alllimitsensuredatroom temperature(standardtypeface)and attemperatureextremes(boldtypeface)when outputcurrentislimited tothevaluegiveninthetemperaturederatingcurves.See theApplicationInformationsectionforcurves.Alllimitsattemperature extremesareensuredusingstandardStatisticalQualityControl(SQC) methods.Alllimitsareused tocalculateAverageOutgoing QualityLevel(AOQL). LM2825-ADJ ElectricalCharacteristics(1) SpecificationswithstandardtypefaceareforTA = 25°C, and thosewithboldfacetypeapplyoverfullOperating Temperature Range .TestCircuit,see Figure18. Symbol Parameter Conditions LM2825-ADJ Units (Limits)Typical(2) Limit(3) VADJ AdjustPinVoltage 4.5V≤ VIN ≤ 40V,0.1A≤ ILOAD ≤ 1A 1.230 V 1.23V≤ VOUT ≤ 8V 1.193/1.180 V(min) 1.267/1.280 V(max) η Efficiency VIN = 12V,ILOAD = 0.5A 74 % VOUT Programmed for3V.See CircuitofFigure18 (1) When theLM2825 isused as shown inFigure18 testcircuit,systemperformancewillbe as shown inElectricalCharacteristics. (2) Typicalnumbers areat25°C and representthemost likelynorm. (3) Alllimitsensuredatroom temperature(standardtypeface)and attemperatureextremes(boldtypeface)when outputcurrentislimited tothevaluegiveninthetemperaturederatingcurves.See theApplicationInformationsectionforcurves.Alllimitsattemperature extremesareensuredusingstandardStatisticalQualityControl(SQC) methods.Alllimitsareused tocalculateAverageOutgoing QualityLevel(AOQL). LM2825H-ADJ ElectricalCharacteristics(1) SpecificationswithstandardtypefaceareforTA = 25°C, and thosewithboldfacetypeapplyoverfullOperating Temperature Range .TestCircuit,see Figure18. Symbol Parameter Conditions LM2825H-ADJ Units (Limits)Typical(2) Limit(3) VADJ AdjustPinVoltage 9V ≤ VIN ≤ 40V,0.1A≤ ILOAD ≤ 0.55A 1.230 V 7V ≤ VOUT ≤ 15V 1.193/1.180 V(min) 1.267/1.280 V(max) η Efficiency VIN = 24V,ILOAD = 0.5A 87 % VOUT Programmed for12V.See CircuitofFigure18 (1) When theLM2825 isused as shown inFigure18 testcircuit,systemperformancewillbe as shown inElectricalCharacteristics. (2) Typicalnumbers areat25°C and representthemost likelynorm. (3) Alllimitsensuredatroom temperature(standardtypeface)and attemperatureextremes(boldtypeface)when outputcurrentislimited tothevaluegiveninthetemperaturederatingcurves.See theApplicationInformationsectionforcurves.Alllimitsattemperature extremesareensuredusingstandardStatisticalQualityControl(SQC) methods.Alllimitsareused tocalculateAverageOutgoing QualityLevel(AOQL).

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www.ti.com SNVS127C –MAY 1997–REVISED APRIL 2013 AllOutput VoltageVersionsElectricalCharacteristics SpecificationswithstandardtypefaceareforTA = 25°C, and thosewithboldfacetypeapplyoverfullOperatingRange. Unlessotherwisespecified,VIN = 12V for3.3V,5.0Vand ADJ versions,VIN = 24V for12V and H-ADJ versions,ILOAD = 100 mA. Symbol Parameter Conditions LM2825-XX Units (Limits)Typical(1) Limit(2) ICL DC OutputCurrentLimit R L = 0Ω 1.4 A

1.2 A(min)

2.4 A(max)

IQ OperatingQuiescent SD/SS Pin= 3.1V(3) 5 mA Current 10 mA(max) ISTBY StandbyQuiescent SD/SS Pin= 0V (3) 65 μA Current 200 μA(max) IADJ AdjustPinBiasCurrent AdjustableVersionsOnly,VFB = 1.3V 6 nA 50/100 nA(max) fO OscillatorFrequency See (4) 150 kHz θJA ThermalResistance JunctiontoAmbient(5) 30 °C/W SHUTDOWN/SOFT-START CONTROL TestCircuit,see Figure17 VSD Shutdown Threshold 1.3 V Voltage Low (ShutdownMode) 0.6 V(max) High(Soft-startMode) 2.0 V(min) VSS Soft-startVoltage VOUT = 20% ofNominalOutputVoltage 2 V VOUT = 100% ofNominalOutputVoltage 3 ISD Shutdown Current VSHUTDOWN = 0.5V(3) 5 μA 10 μA(max) ISS Soft-startCurrent VSOFT-START = 2.5V(3) 1.6 μA 5 μA(max) (1) Typicalnumbers areat25°C and representthemost likelynorm. (2) Alllimitsensuredatroom temperature(standardtypeface)and attemperatureextremes(boldtypeface)when outputcurrentislimited tothevaluegiveninthetemperaturederatingcurves.See theApplicationInformationsectionforcurves.Alllimitsattemperature extremesareensuredusingstandardStatisticalQualityControl(SQC) methods.Alllimitsareused tocalculateAverageOutgoing QualityLevel(AOQL). (3) ILOAD = 0A. (4) The switchingfrequencyisreducedwhen thesecond stagecurrentlimitisactivated.The amount ofreductionisdeterminedby the severityofcurrentoverload. (5) Junctiontoambientthermalresistance(noexternalheatsink)forthePDIP package withtheleadssolderedtoa printedcircuitboard with(1oz.)copperareaofapproximately2 in2. Copyright© 1997–2013,Texas InstrumentsIncorporated SubmitDocumentationFeedback 5 ProductFolderLinks:LM2825

SNVS127C –MAY 1997–REVISED APRIL 2013 www.ti.com TypicalPerformance Characteristics (CircuitsofFigure17 and Figure18)Unlessotherwisespecified,VIN = 12V for3.3V,5.0Vand ADJ versions,VIN = 24V for 12V and H-ADJ versions,ILOAD = 100 mA, TA = 25°C NormalizedOutput Voltage Efficiency Figure2. Figure3. Dropout Voltage LineRegulation Figure4. Figure5. Load Regulation Output RippleVoltage Figure6. Figure7.

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www.ti.com SNVS127C –MAY 1997–REVISED APRIL 2013 TypicalPerformance Characteristics(continued) (CircuitsofFigure17 and Figure18)Unlessotherwisespecified,VIN = 12V for3.3V,5.0Vand ADJ versions,VIN = 24V for 12V and H-ADJ versions,ILOAD = 100 mA, TA = 25°C OperatingQuiescentCurrent Shutdown QuiescentCurrent Figure8. Figure9. SwitchingFrequency Soft-start Figure10. Figure11. Shutdown/Soft-startCurrent Soft-startResponse Figure12. Figure13. Copyright© 1997–2013,Texas InstrumentsIncorporated SubmitDocumentationFeedback 7 ProductFolderLinks:LM2825

SNVS127C –MAY 1997–REVISED APRIL 2013 www.ti.com TypicalPerformance Characteristics(continued) (CircuitsofFigure17 and Figure18)Unlessotherwisespecified,VIN = 12V for3.3V,5.0Vand ADJ versions,VIN = 24V for 12V and H-ADJ versions,ILOAD = 100 mA, TA = 25°C Switch CurrentLimit AdjustPin Bias Current Figure14. Figure15. Load TransientResponse forContinuous Mode Load TransientResponse forDiscontinuousMode VIN = 20V,VOUT = 5V,IL = 250 mA to750 mA VIN = 20V,VOUT = 5V,IL = 40 mA to140 mA A:OutputVoltage100 mV/div(AC) A:OutputVoltage100 mV/div(AC) B:250 mA to750 mA Load Pulse B:40 mA to140 mA Load Pulse HorizontalTime Base:200 μs/div HorizontalTime Base:200 μs/div Figure16. TypicalLoad TransientResponse

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www.ti.com SNVS127C –MAY 1997–REVISED APRIL 2013 TestCircuit *Optional— Requiredifpackage ismore than6″ away frommain filterorbypasscapacitor. **OptionalSoft-startCapacitor VIN = 40V (max) VOUT = 3.3Vor5V @ 1A or12V @ 0.75A Figure17. Standard TestCircuit (FixedOutput VoltageVersions) *Optional— Requiredifpackage ismore than6″ away frommain filterorbypasscapacitor. OptionalSoft-startCapacitor *Optional— See ApplicationInformation. VIN = 40V (max) VOUT = 1.23Vto8V (LM2825-ADJ) 7V to15V (LM2825H-ADJ) ILOAD = IMAX (See deratingcurvesinApplicationInformation) Figure18. Standard TestCircuit (AdjustableOutput VoltageVersions) Copyright© 1997–2013,Texas InstrumentsIncorporated SubmitDocumentationFeedback 9 ProductFolderLinks:LM2825

SNVS127C –MAY 1997–REVISED APRIL 2013 www.ti.com

APPLICATION INFORMATION

PROGRAMMING OUTPUT VOLTAGE (SelectingR1 and R2 as shown inFigure18) The LM2825 isavailableintwo adjustableoutputversions.The LM2825-ADJ has been optimizedforoutput voltagesbetween 1.23V and 8V, whiletheLM2825H-ADJ coverstheoutputvoltagerange of7V to15V. Both adjustableversionsaresetinthefollowingway. (1) Selecta valueforR1 between 240Ω and 1.5kΩ.The lowerresistorvaluesminimizenoisepickupatthesensitive adjustpin.(Forlowesttemperaturecoefficientand thebeststabilitywithtime,use 1% metalfilmresistors.) SelectR2 withthefollowingequation. (2) When programmingVOUT ,keep inmind thatVIN must be greaterthanVOUT + 2V forproperoperation. OPTIONAL EXTERNAL COMPONENTS SOFT-START CAPACITOR C SS : A capacitoron thispinprovidesthe regulatorwitha Soft-startfeature(slowstart-up).The currentdrawn fromthesourcestartsoutata low averagelevelwithnarrowpulses,and ramps up ina controlledmanner as the pulsesexpand totheirsteady-statewidth.Thisreducesthestartupcurrentconsiderably,and delaysand slows down theoutputvoltagerisetime. Itisespeciallyusefulinsituationswhere theinputpower sourceislimitedintheamount ofcurrentitcan deliver, sinceyou avoidloadingdown thistypeofpower supply. Under some operatingconditions,a Soft-startcapacitorisrequiredforproperoperation.Figure19 indicatesthe inputvoltageand ambienttemperatureconditionsforwhicha Soft-startcapacitormay be required. This curve istypicalforfullensured outputcurrentand can be used as a guideline.As the outputcurrent decreases,theoperatingarearequiringa Soft-startcapacitordecreases.Capacitorvaluesbetween 0.1μF and 1 μF arerecommended. Tantalumorceramiccapacitorsareappropriateforthisapplication. INPUT CAPACITOR C IN: An optionalinputcapacitorisrequiredifthepackage ismore than6″ away from themain filteror bypass capacitor.A low ESR aluminum ortantalumbypass capacitorisrecommended between theinputpinand ground topreventlargevoltagetransientsfromappearingattheinput.Inaddition,tobe conservative,theRMS current ratingoftheinputcapacitorshouldbe selectedtobe atleast½ theDC loadcurrent.Witha 1A load,a capacitor witha RMS currentratingofatleast500 mA isrecommended. The voltageratingshouldbe approximately1.25timesthemaximum inputvoltage.Witha nominalinputvoltage of 12V, an aluminum electrolyticcapacitor(PanasonicHFQ seriesor NichiconPL seriesor equivalent)witha voltageratinggreaterthan15V (1.25× VIN)wouldbe needed. Solidtantaluminputcapacitorsshouldonlybe used where theinputsourceisimpedance currentlimited.High dV/dtappliedattheinputcan cause excessivechargecurrentthroughlow ESR tantalumcapacitors.Thishigh chargecurrentcan resultinshortingwithinthecapacitor.Itisrecommended thattheybe surgecurrenttestedby themanufacturer.TheTPS seriesavailablefromAVX, and the593D seriesfromSprague arebothsurgecurrent tested. Use cautionwhen usingceramiccapacitorsforinputbypassing,because itmay cause ringingattheVIN pin.

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www.ti.com SNVS127C –MAY 1997–REVISED APRIL 2013 LOWERING OUTPUT RIPPLE When usingtheadjustableparts,one can achieveloweroutputripplevoltageby shortinga resistorinternaltothe LM2825. However,ifthisresistorisshorted,a feedforwardcapacitormust be used tokeep theregulatorstable. For thisreason,thisresistormust be leftopen on allofthefixedoutputvoltageversionsorinstabilitywillresult. See the FEED FORWARD CAPACITOR SELECTION (CFF) selectionbelow.Shortingthe internalresistoris accomplishedby shortingpins8 and 9 on theLM2825, and willtypicallyreduceoutputrippleby 25 to33%. FEED FORWARD CAPACITOR SELECTION (CFF) When usingan adjustablepartand pins8 and 9 areshortedtoreduceoutputripple,a feedforwardcapacitoris required.Thiscapacitoristypicallybetween 680 pF and 2700 pF. Table1 shows thevalueforC FF fora given outputvoltageand feedbackresistorR 2 (R1 = 1 kΩ). Table1.C FF SelectionTable VOUT R2 C FF LM2825-ADJ 2 630 N/A 3 1.43k N/A 4 2.26k 2700 pF 5 3.09k 2700 pF 6 3.92k 2200 pF 7 4.75k 1800 pF 8 5.49k 1500 pF LM2825H-ADJ 7 4.75k 2700 pF 8 5.49k 2200 pF 9 6.34k 1800 pF 10 7.15k 1500 pF 11 8.06k 1000 pF 12 8.87k 820 pF 13 9.53k 680 pF 14 10.5k 680 pF 15 11.3k 680 pF SHUTDOWN The circuitshown inFigure24 shows 2 circuitsfortheShutdown/Soft-startfeatureusingdifferentlogicsignalsfor shutdownand usinga 0.1μF Soft-startcapacitor. THERMAL CONSIDERATIONS The LM2825 isavailableina 24-pinthroughholePDIP. The package ismolded plasticwitha copperleadframe. When thepackage issolderedtothePC board,thecopperand theboardaretheheatsinkfortheLM2825. Copyright© 1997–2013,Texas InstrumentsIncorporated SubmitDocumentationFeedback 11 ProductFolderLinks:LM2825

SNVS127C –MAY 1997–REVISED APRIL 2013 www.ti.com Figure19. Usage oftheSoft-startCapacitor OUTPUT CURRENT DERATING FOR TJ = −40°C to−25°C AND TJ = −25°C to0°C Atthelowertemperatureextremes,theswitchcurrentlimitdropsoffsharply.As a result,a loweroutputcurrentis availableinthistemperaturerange.See Figure20 and Figure21 forthetypicalavailableoutputcurrentatthese temperatureranges. Figure20. LM2825 Output CurrentDeratingforTJ = −40°C to−25°C

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www.ti.com SNVS127C –MAY 1997–REVISED APRIL 2013 Figure21. LM2825 Output CurrentDeratingforTJ = −25°C to0°C Copyright© 1997–2013,Texas InstrumentsIncorporated SubmitDocumentationFeedback 13 ProductFolderLinks:LM2825

SNVS127C –MAY 1997–REVISED APRIL 2013 www.ti.com OUTPUT CURRENT DERATING FOR TA = 0°C to70°C Due tothelimitedswitchcurrent,theLM2825 cannotsupplythefullone ampere outputcurrentovertheentire inputand outputvoltagerange.Figure22 shows the typicalavailableoutputcurrentforany inputand output voltagecombination.Thisappliesforalloutputvoltageversions. Figure22. LM2825 Output CurrentDeratingforTA = 0°C to70°C

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www.ti.com SNVS127C –MAY 1997–REVISED APRIL 2013 OUTPUT CURRENT DERATING FOR TA = 70°C to85°C At highthesehighambienttemperatures,theLM2825 cannotsupplythefullone ampere overtheentireinput and outputvoltagerange.This isdue to thermalreasons and Figure23 shows the typicalavailableoutput currentforany inputand outputvoltagecombination.Thisappliesforalloutputvoltageversions. Figure23. LM2825 Output CurrentDeratingforTA = 70°C to85°C Figure24. TypicalCircuitsUsing Shutdown/Soft-startFeatures Copyright© 1997–2013,Texas InstrumentsIncorporated SubmitDocumentationFeedback 15 ProductFolderLinks:LM2825

SNVS127C –MAY 1997–REVISED APRIL 2013 www.ti.com TYPICAL THROUGH HOLE PC BOARD LAYOUT (2X SIZE), SINGLE SIDED, THROUGH HOLE PLATED Note:Holesarenotshown. “No ConnectPins”areconnectedtocopperpads forthermalreasonsonlyand must remainelectricallyisolated. Figure25. 2X PrintedCircuitBoard Layout

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REVISION HISTORY

www.ti.com 22-Jul-2016 Addendum-Page 1 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Qty Eco Plan (2) Lead/Ball Finish (6) MSL Peak Temp (3) Op Temp (°C) Device Marking (4/5) Samples LM2825HN-ADJ/NOPB NRND PDIP NFL 24 12 Green (RoHS & no Sb/Br) CU SN Level-1-NA-UNLIM -40 to 125 LM2825HN-ADJ ADJ, 1A OUTPUT LM2825N-12/NOPB NRND PDIP NFL 24 12 Green (RoHS & no Sb/Br) CU SN Level-1-NA-UNLIM -40 to 125 LM2825N-12 12V, 1A OUTPUT LM2825N-3.3/NOPB NRND PDIP NFL 24 12 Green (RoHS & no Sb/Br) CU SN Level-1-NA-UNLIM -40 to 125 LM2825N-3.3 3.3V, 1A OUTPUT LM2825N-5.0/NOPB NRND PDIP NFL 24 12 Green (RoHS & no Sb/Br) CU SN Level-1-NA-UNLIM -40 to 125 LM2825N-5.0 5.0V, 1A OUTPUT LM2825N-ADJ/NOPB NRND PDIP NFL 24 12 Green (RoHS & no Sb/Br) CU SN Level-1-NA-UNLIM -40 to 125 LM2825N-ADJ ADJ, 1A OUTPUT (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. (4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device. (5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Device Marking for that device.

www.ti.com 22-Jul-2016 Addendum-Page 2 (6) Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish value exceeds the maximum column width. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.

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