PTN78020WAZT.B

PTN78020W TI | Alldatasheet

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1%,□0.05□W (Required) PTN78020 (Top□View) STANDARD APPLICATION RSET# 4 5 VO Sense L O A D *See□the section□for□capacitor□recommendations.□The□minimum□input□capacitance for□is PTN78020W,□and PTN78020H Application□Information 2.2 F□for 18.8 F□(4□x□4.7 F)□for/c109 /c109 /c109 #R oltage.□See□the section□for□values.SET Application□Informationis□required□to□adjust□the□output□v C * Ceramic (Required) I C * 330 F (Required) O /c109 PTN78020W PTN78020H www.ti.com SLTS228C –DECEMBER 2004–REVISED AUGUST 2011 6-A,WIDE-INPUTADJUSTABLESWITCHINGREGULATOR Check forSamples: PTN78020W ,PTN78020H 1FEATURES APPLICATIONS

• 6-A Output Current • General-Purpose,IndustrialControls, HVAC Systems, Testand Measurement,• Wide-InputVoltage MedicalInstrumentation,AC/DC Adaptors,(7V to36 V) /(15V to36 V) Vehicles,Marine,and Avionics• Wide-Output VoltageAdjust (2.5V to12.6V) /(11.85V to22 V)
• High Efficiency(Up to96%)
• On/OffInhibit
• UndervoltageLockout
• Output CurrentLimit
• OvertemperatureShutdown
• OperatingTemperature:-40°C to85°C
• SurfaceMount Package Available

DESCRIPTION

The PTN78020 isa seriesofhigh-efficiency,step-downintegratedswitchingregulators(ISRs),thatrepresentthe thirdgenerationintheevolutionofhigh-performancepower modules designedforindustrialuse.The wide-input voltagerangemakes thesemodules suitablefora varietyofapplicationsthatoperateoff12–V, 24–V, and 28–V dc power.In new designstheyshouldbe consideredinplaceof the PT6620, PT6650, PT6680, and PT6880 seriesofsinglein-linepin(SIP)products.The PTN78020 issmallerand lighterthanitspredecessors,and has eithersimilaror improved electricalperformancecharacteristics.The caseless,double-sidedpackage has excellentthermalcharacteristics,and iscompatiblewithTI's roadmap forRoHS and lead-freecompliance. Operating from a wide-inputvoltagerange, the PTN78020 provideshigh-efficiency,step-down voltage conversionforloadsofup to6 A. The outputvoltageissetusinga single,externalresistor.The PTN78020W may be settoany valuewithintherange,2.5V to12.6V, and thePTN78020H from11.85V to22 V. The output voltageofthePTN78020W can be as littleas 2 V lowerthantheinput,allowingoperationdown to7 V, withan outputvoltageof5 V. The outputvoltageofthePTN78020H can be as littleas 3 V lowerthantheinput,allowing operationdown to15 V,withan outputvoltageof12 V. The PTN78020 has undervoltagelockout,an integralon/offinhibit,and includesan outputcurrentlimitand overtemperatureprotection. Pleasebe aware thatan importantnoticeconcerningavailability,standardwarranty,and use incriticalapplicationsofTexas Instrumentssemiconductorproductsand disclaimerstheretoappearsattheend ofthisdatasheet. PRODUCTION DATA informationiscurrentas ofpublicationdate. Copyright© 2004–2011,Texas InstrumentsIncorporatedProductsconform to specificationsper the terms of the Texas Instrumentsstandardwarranty.Productionprocessingdoes not necessarilyincludetestingofallparameters.

SLTS228C –DECEMBER 2004–REVISED AUGUST 2011 www.ti.com This integratedcircuitcan be damaged by ESD. Texas Instrumentsrecommends thatallintegratedcircuitsbe handled with appropriateprecautions.Failuretoobserveproperhandlingand installationprocedurescan cause damage. ESD damage can rangefromsubtleperformancedegradationtocompletedevicefailure.Precisionintegratedcircuitsmay be more susceptibletodamage because verysmallparametricchanges couldcause thedevicenottomeet itspublishedspecifications.

ORDERING INFORMATION

For themost currentpackage and orderinginformation,see thePackage Option Addendum attheend ofthisdatasheet,or see theTIwebsiteatwww.ti.com. ABSOLUTE MAXIMUM RATINGS (1) overoperatingfree-airtemperaturerangeunlessotherwisenoted allvoltageswithrespecttoGND UNIT TA Operatingfree-airtemperature Over VIrange –40°C to85°C Surfacetemperatureofmodule body orpins HorizontalTHWave soldertemperature 260°C(5seconds) (suffixAH & AD) HorizontalSMD 235°C(suffixAS) Solderreflowtemperature Surfacetemperatureofmodule body orpins HorizontalSMD 260°C(suffixAZ) TS Storagetemperature –55°C to125°C VI Inputsurgevoltage,10 ms maximum 38 V VINH Inhibit(pin3)inputvoltage –0.3V to5 V PO Outputpower VI ≤ 24 V orVO ≥ 15 V 90 W (1) Stressesbeyond thoselistedunderabsolutemaximum ratingsmay cause permanentdamage tothedevice.These arestressratings only,and functionaloperationofthedeviceattheseorany otherconditionsbeyond thoseindicatedunderrecommended operating conditionsisnotimplied.Exposuretoabsolute-maximum-ratedconditionsforextendedperiodsmay affectdevicereliability. RECOMMENDED OPERATING CONDITIONS MIN MAX UNIT PTN78020W 7 36 VI Inputvoltage V PTN78020H 15 36 TA Operatingfree-airtemperature –40 85 °C PACKAGE SPECIFICATIONS PTN78020x (SuffixAH, AS, & AZ) Weight 7.3grams Flammability Meets UL 94 V-O HorizontalT/H (suffixAH and AD) 250 G (1) Mechanical Per Mil-STD-883D,Method 2002.3,1 ms, 1/2sine, shock mounted HorizontalSMD (suffixAS and AZ) 125 G (1) HorizontalT/H (suffixAH and AD) 20 G (1) Mechanical Mil-STD-883D,Method 2007.2,20-2000Hzvibration HorizontalSMD (suffixAS and AZ) 10 G (1) (1) Qualificationlimit.

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www.ti.com SLTS228C –DECEMBER 2004–REVISED AUGUST 2011

ELECTRICAL CHARACTERISTICS

operatingat25°C free-airtemperature,VI = 20 V,VO = 5 V,IO = IO (max),C I = 2.2µF,C O = 330 µF (unlessotherwisenoted) PTN78020W PARAMETER TEST CONDITIONS MIN TYP MAX UNIT VI ≤24 V 0.1 6 (1) IO Outputcurrent TA = 25°C, naturalconvectionairflow VI= 32 V 0.1 5 (1) A VI Inputvoltagerange Over IO range 7 (2) 36 (3) V Set-pointvoltagetolerance TA = 25°C ±2% (4) Temperaturevariation –40°C to+85°C ±0.5% Lineregulation Over VIrange ±10 mVVO Load regulation Over IO range ±10 mV Includessetpoint,line,loadTotaloutputvoltagevariation ±3% (4) –40 < TA < 85°C VI < 12 V 2.5 VI – 2 12 V ≤ VI ≤ 15.1V 2.5 VI – 2.5 VO (adj) Outputvoltageadjustrange V 15.1V < VI ≤ 25 V 2.5 12.6 VI> 25 V 0.1× VI 12.6 VI= 24 V,R SET = 732 Ω,VO = 12 V 94% η Efficiency VI= 15 V,R SET = 21 kΩ,VO = 5 V 88% VI= 15 V,R SET = 78.7kΩ,VO = 3.3V 85% Outputvoltageripple 20-MHz bandwith 1% VO V(PP) IO (LIM) Currentlimitthreshold ΔVO = –50 mV 8.5 A

1 A/µs loadstepfrom50% to100% IO max

Transientresponse Recoverytime 200 µs VO over/undershoot 5 %V O Inputhighvoltage(VIH) 1 Open (5) V Inhibitcontrol(pin3) Inputlowvoltage(VIL) –0.1 0.3 Inputlowcurrent(IIL) 0.25 mA II(stby) Inputstandbycurrent Pin3 connectedtoGND 17 mA VIincreasing 5.5 UVLO Undervoltagelockout V VI decreasing 5.2 FS Switchingfrequency Over VIand IO ranges 440 550 660 kHz C I Externalinputcapacitance Ceramicand nonceramic 2.2(6) µF Ceramic 300 µF C O Externaloutputcapacitance Nonceramic 330 (7) 2,000 Equiv.seriesresistance(nonceramic) 10 (8) m Ω Per TelcordiaSR-332,50% stress,MTBF Calculatedreliability 5.6 106 HrTA = 40°C, groundbenign (1) Above an inputvoltageof24 V,themaximum outputcurrentmust be deratedby 125 mA pervoltabove 24 V. (2) Foroutputvoltageslessthan10 V,theminimum inputvoltageis7 V or(VO + 2)V,whicheverisgreater.Foroutputvoltagesof10 V and higher,theminimum inputvoltageis(VO + 2.5V).See theApplicationInformationsectionforfurtherguidance. (3) Foroutputvoltageslessthan3.6V,themaximum inputvoltageis10 × VO .See theApplicationInformationsectionforfurtherguidance. (4) The set-pointvoltagetoleranceisaffectedby thetoleranceand stabilityofR SET .The statedlimitisunconditionallymet ifR SET has a toleranceof1% withwith100 ppm/°C orbettertemperaturestability. (5) Thiscontrolpinhas an internalpullup,and ifleftopen-circuit,themodule operateswhen inputpower isapplied.The open-circuitvoltage istypically1.5V.A small,low-leakage(< 100 nA) MOSFET isrecommended forcontrol.See theApplicationInformationsectionfor furtherguidance. (6) An external2.2-µF ceramiccapacitorisrequiredacrosstheinput(VIand GND) forproperoperation.Locatethecapacitorclosetothe module. (7) 330 µF ofoutputcapacitanceisrequiredforproperoperation.See theApplicationInformationsectionforfurtherguidance. (8) ThisisthetypicalESR foralltheelectrolytic(nonceramic)capacitance.Use 17 m Ω as theminimum when usingmax-ESR valuesto calculate. Copyright© 2004–2011,Texas InstrumentsIncorporated SubmitDocumentationFeedback 3 ProductFolderLink(s):PTN78020W PTN78020H

SLTS228C –DECEMBER 2004–REVISED AUGUST 2011 www.ti.com operatingat25°C free-airtemperature,VI = 24 V,VO = 12 V,IO = IO (max),C I = 4× 4.7µF,C O = 330 µF (unlessotherwise noted) PTN78020H PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Vo =12 V 0.1 6 (1) IO Outputcurrent TA = 25°C, naturalconvectionairflow Vo =15 V 0.1 6 (1)(2) A Vo = 22 V 0.1 4.09(2) VI Inputvoltagerange Over IO range 15 (3) 36 V Set-pointvoltagetolerance TA = 25°C ±2% (4) Temperaturevariation –40°C to+85°C ±0.5% Lineregulation Over VIrange ±10 mVVO Load regulation Over IO range ±10 mV Includessetpoint,line,loadTotaloutputvoltagevariation ±3% (4) –40 < TA < 85°C VI < 19 V 11.85 VI – 3 19 V ≤ VI ≤ 25 V 11.85 VI – 4VO (adj) Outputvoltageadjustrange V VI> 25 V 11.85 22 VI= 24 V,R SET = 383 k Ω,VO = 12 V 94% η Efficiency VI= 24 V,R SET = 15 kΩ,VO = 15 V 95% VI= 32 V,R SET = 95.3Ω,VO = 22 V 96% Outputvoltageripple 20-MHz bandwith 1% VO V(PP) IO (LIM) Currentlimitthreshold ΔVO = –50 mV 8.0 A Transientresponse Recoverytime 200 µs VO over/undershoot 200 mV Inputhighvoltage(VIH) 1 Open (5) V Inhibitcontrol(pin3) Inputlowvoltage(VIL) –0.1 0.3 Inputlowcurrent(IIL) 0.25 mA II(stby) Inputstandbycurrent Pin3 connectedtoGND 17 mA VIincreasing 12.2 UVLO Undervoltagelockout V VIdecreasing 12 FS Switchingfrequency Over VIand IO ranges 440 550 660 kHz C I Externalinputcapacitance Ceramicand nonceramic 18.8(6) µF Ceramic 0 300 µF C O Externaloutputcapacitance Nonceramic 330 (7) 2,000 Equiv.seriesresistance(nonceramic) 10 (8) m Ω Per TelcordiaSR-332,50% stress,MTBF Calculatedreliability 5.6 106 HrTA = 40°C, groundbenign (1) The maximum outputcurrentis6 A ora maximum outputpower of90 W, whicheverisless.Above an inputvoltageof24 V,the maximum outputcurrentmust be deratedby 125 mA pervoltabove 24 V.See theTypicalCharacteristicssectionforfurtherguidance. (2) Above an outputvoltageof15 V,themaximum outputcurrentmust be deratedby 285 mA pervolt.The maximum outputpower is90 W. See theapplicationinformationforfurtherguidance. (3) Foroutputvoltageslessthan19 V,theminimum inputvoltageis15 V or(VO + 3)V,whicheverisgreater.Foroutputvoltagesof19 V and higher,theminimum inputvoltageis(VO + 4 V).See theApplicationInformationsectionforfurtherguidance. (4) The set-pointvoltagetoleranceisaffectedby thetoleranceand stabilityofR SET .The statedlimitisunconditionallymet ifR SET has a toleranceof1% withwith100 ppm/°C orbettertemperaturestability. (5) Thiscontrolpinhas an internalpullup,and ifleftopen-circuit,themodule operateswhen inputpower isapplied.The open-circuitvoltage istypically1.5V.A small,low-leakage(< 100 nA) MOSFET isrecommended forcontrol.See theApplicationInformationsectionfor furtherguidance. (6) Fourexternal4.7-µF ceramiccapacitorsarerequiredacrosstheinput(VIand GND) forproperoperation.Locatethecapacitorscloseto themodule. (7) 330 µF ofoutputcapacitanceisrequiredforproperoperation.See theApplicationInformationsectionforfurtherguidance. (8) ThisisthetypicalESR foralltheelectrolytic(nonceramic)capacitance.Use 17 m Ω as theminimum when usingmax-ESR valuesto calculate.

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(Top□View) 543 PTN78020W PTN78020H www.ti.com SLTS228C –DECEMBER 2004–REVISED AUGUST 2011 PIN ASSIGNMENT TERMINAL FUNCTIONS TERMINAL I/O DESCRIPTION NAME NO. Thisisthecommon groundconnectionfortheVIand VO power connections.Itisalsothe0-Vdc referenceGND 1,7 fortheInhibitand VO Adjustcontrolinputs. VI 2 I The positiveinputvoltagepower node tothemodule,whichisreferencedtocommon GND. The Inhibitpinisan open-collector/drainactive-lowinputthatisreferencedtoGND. Applyinga low-level groundsignaltothisinputdisablesthemodule's outputand turnsofftheoutputvoltage.When theInhibitInhibit 3 I controlisactive,theinputcurrentdrawn by theregulatorissignificantlyreduced.IftheInhibitpinisleft open-circuit,themodule producesan outputwhenever a validinputsourceisapplied. A 1% resistormust be connectedbetween thispinand GND (pin7)tosettheoutputvoltageofthe module.Ifleftopen-circuit,theoutputvoltageissettoitsdefaultvalue.The temperaturestabilityoftheVO Adjust 4 I resistorshouldbe 100 ppm/°C (orbetter).The standardresistorvaluefora number ofcommon output voltagesisprovidedintheapplicationinformation. The sense inputallowstheregulationcircuittocompensate forvoltagedropbetween themodule and the VO Sense 5 I load.Foroptimum voltageaccuracy,VO Sense shouldbe connectedtoVO .Ifthe sense featureisnotused,thispinmay be leftdisconnected. VO 6 O The regulatedpositivepower outputwithrespecttotheGND node. Copyright© 2004–2011,Texas InstrumentsIncorporated SubmitDocumentationFeedback 5 ProductFolderLink(s):PTN78020W PTN78020H

IO -□Output□Current□- A V -□Output□Voltage□Ripple□-□mVO PP VO =□3.3□V VO =□5□V 0 1 2 3 4 5 6 P -□Power□Dissipation□-□WD IO -□Output□Current□- A VO =□3.3□□V VO =□5□□V 0 1 2 3 4 5 6 100 VO =□3.3□V VO =□5□V Efficiency□-□% IO -□Output□Current□- A 0 1 2 3 4 5 6 IO -□Output□Current□- A 200□LFM 100□LFM Nat□conv Temperature□Derating□- C o Airflow VO =□3.3□V 0 1 2 3 4 5 6 IO -□Output□Current□- A 200□LFM 100□LFM Nat□conv Temperature□Derating□- C o Airflow VO =□5□V PTN78020W PTN78020H SLTS228C –DECEMBER 2004–REVISED AUGUST 2011 www.ti.com TYPICAL CHARACTERISTICS (7-VINPUT)(1) (2) EFFICIENCY OUTPUT VOLTAGE RIPPLE POWER DISSIPATION vs vs vs OUTPUT CURRENT OUTPUT CURRENT OUTPUT CURRENT Figure1. Figure2. Figure3. TEMPERATURE DERATING TEMPERATURE DERATING vs vs OUTPUT CURRENT OUTPUT CURRENT Figure4. Figure5. (1) The electricalcharacteristicdatahas been developedfromactualproductstestedat25°C. Thisdataisconsideredtypicalforthe converter.AppliestoFigure1,Figure2,and Figure3. (2) The temperaturederatingcurvesrepresenttheconditionsatwhichinternalcomponents areatorbelowthemanufacturer's maximum operatingtemperatures.Deratinglimitsapplytomodules soldereddirectlytoa 100 mm x 100 mm double-sidedPCB with2 oz.copper. Forsurfacemount packages(AS and AZ suffix),multiplevias(platedthroughholes)arerequiredtoadd thermalpathsaroundthepower pins.Pleaserefertothemechanicalspecificationformore information.AppliestoFigure4 and Figure5.

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IO -□Output□Current□- A VO-□Output□Voltage□Ripple□-□mV PP VO =□3.3□V VO =□5□V V =□12□VO 0 1 2 3 4 5 6 -□Power□Dissipation□-□W PD IO -□Output□Current□- A VO =□3.3□□V VO =□5□□V VO =□12□□V 0 1 2 3 4 5 6 100 VO =□3.3□V VO =□5□V Efficiency□-□% IO -□Output□Current□- A V =□12□VO 0 1 2 3 4 5 6 IO -□Output□Current□- A 200□LFM 100□LFM Nat□conv Temperature□Derating□- C o Airflow VO =□5□V 0 1 2 3 4 5 6 IO -□Output□Current□- A 200□LFM 100□LFM Nat□conv Temperature□Derating□- C o Airflow VO =□12□V PTN78020W PTN78020H www.ti.com SLTS228C –DECEMBER 2004–REVISED AUGUST 2011 TYPICAL CHARACTERISTICS (15-VINPUT)(1) (2) EFFICIENCY OUTPUT VOLTAGE RIPPLE POWER DISSIPATION vs vs vs OUTPUT CURRENT OUTPUT CURRENT OUTPUT CURRENT Figure6. Figure7. Figure8. TEMPERATURE DERATING TEMPERATURE DERATING vs vs OUTPUT CURRENT OUTPUT CURRENT Figure9. Figure10. (1) The electricalcharacteristicdatahas been developedfromactualproductstestedat25°C. Thisdataisconsideredtypicalforthe converter.AppliestoFigure6,Figure7,and Figure8. (2) The temperaturederatingcurvesrepresenttheconditionsatwhichinternalcomponents areatorbelowthemanufacturer's maximum operatingtemperatures.Deratinglimitsapplytomodules soldereddirectlytoa 100 mm x 100 mm double-sidedPCB with2 oz.copper. Forsurfacemount packages(AS and AZ suffix),multiplevias(platedthroughholes)arerequiredtoadd thermalpathsaroundthepower pins.Pleaserefertothemechanicalspecificationformore information.AppliestoFigure9 and Figure10. Copyright© 2004–2011,Texas InstrumentsIncorporated SubmitDocumentationFeedback 7 ProductFolderLink(s):PTN78020W PTN78020H

Efficiency□-□% I -□Output□Current□- AO V =□3.3□VO V =□5□VO V =□12□VO V =□18□VO V =□15□VO V -□Output□Voltage□Ripple□-□mVO PP 0 1 2 3 4 5 6 I -□Output□Current□- AO V =□3.3□VO V =□5□VO V =□15□VO V =□12□VO V =□18□VO 0 1 2 3 4 5 6 P -□Power□Dissipation□-□WD IO -□Output□Current□- A V =□18□VO V =□15□VO V =□12□VO V =□5□VO V =□3.3□VO 0 1 2 3 4 5 6 IO -□Output□Current□- A 200□LFM 100□LFM Nat□conv Temperature□Derating□- C /c176 Airflow VO =□5□V 0 1 2 3 4 5 6 IO -□Output□Current□- A 200□LFM 100□LFM Nat□conv Temperature□Derating□- C /c176 Airflow VO =□12□V 0 1 2 3 4 5 6 IO -□Output□Current□- A 200□LFM 100□LFM Nat□conv Temperature□Derating□- C /c176 Airflow VO =□15□V PTN78020W PTN78020H SLTS228C –DECEMBER 2004–REVISED AUGUST 2011 www.ti.com TYPICAL CHARACTERISTICS (24-VINPUT)(1) (2) EFFICIENCY OUTPUT VOLTAGE RIPPLE POWER DISSIPATION vs vs vs OUTPUT CURRENT OUTPUT CURRENT OUTPUT CURRENT Figure11. Figure12. Figure13. TEMPERATURE DERATING TEMPERATURE DERATING TEMPERATURE DERATING vs vs vs OUTPUT CURRENT OUTPUT CURRENT OUTPUT CURRENT Figure14. Figure15. Figure16. (1) The electricalcharacteristicdatahas been developedfromactualproductstestedat25°C. Thisdataisconsideredtypicalforthe converter.AppliestoFigure11,Figure12,and Figure13. (2) The temperaturederatingcurvesrepresenttheconditionsatwhichinternalcomponents areatorbelowthemanufacturer's maximum operatingtemperatures.Deratinglimitsapplytomodules soldereddirectlytoa 100 mm x 100 mm double-sidedPCB with2 oz.copper. Forsurfacemount packages(AS and AZ suffix),multiplevias(platedthroughholes)arerequiredtoadd thermalpathsaroundthepower pins.Pleaserefertothemechanicalspecificationformore information.AppliestoFigure14 throughFigure16.

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V -□Output□Voltage□Ripple□-□mVO PP 0 1 2 3 4 5 I -□Output□Current□- AO V =□3.3□VO V =□5□VO V =□12□VO V =□15□VOV =□22□VO 0 1 2 3 4 5 IO -□Output□Current□- A P -□Power□Dissipation□-□WD V =□22□VO V =□15□VO V =□3.3□VO V =□5□VO V =□12□VO 0 1 2 3 4 5 100 Efficiency□-□% I -□Output□Current□- AO V =□3.3□VO V =□5□VO V =□12□VO V =□22□VO V =□15□VO 0 1 2 3 4 5 I -□Output□Current□- AO 200□LFM Nat□conv Airflow VO =□5□V Temperature□Derating□- C /c176 100□LFM 0 1 2 3 4 5 I -□Output□Current□- AO 200□LFM 100□LFM Nat□conv Airflow VO =□15□V Temperature□Derating□- C /c176 0 1 2 3 4 5 I -□Output□Current□- AO 200□LFM 100□LFM Nat□conv Temperature□Derating□- C /c176 Airflow VO =□12□V 0 1 2 3 4 I -□Output□Current□- AO Airflow VO =□22□V Nat□conv 100□LFM 200□LFM Temperature□Derating□- C /c176 PTN78020W PTN78020H www.ti.com SLTS228C –DECEMBER 2004–REVISED AUGUST 2011 TYPICAL CHARACTERISTICS (32-VINPUT)(1) (2) EFFICIENCY OUTPUT VOLTAGE RIPPLE POWER DISSIPATION vs vs vs OUTPUT CURRENT OUTPUT CURRENT OUTPUT CURRENT Figure17. Figure18. Figure19. TEMPERATURE DERATING TEMPERATURE DERATING TEMPERATURE DERATING vs vs vs OUTPUT CURRENT OUTPUT CURRENT OUTPUT CURRENT Figure20. Figure21. Figure22. TEMPERATURE DERATING vs OUTPUT CURRENT Figure23. (1) The electricalcharacteristicdatahas been developedfromactualproductstestedat25°C. Thisdataisconsideredtypicalforthe converter.AppliestoFigure17,Figure18,and Figure19. (2) The temperaturederatingcurvesrepresenttheconditionsatwhichinternalcomponents areatorbelowthemanufacturer's maximum operatingtemperatures.Deratinglimitsapplytomodules soldereddirectlytoa 100 mm x 100 mm double-sidedPCB with2 oz.copper. Forsurfacemount packages(AS and AZ suffix),multiplevias(platedthroughholes)arerequiredtoadd thermalpathsaroundthepower pins.Pleaserefertothemechanicalspecificationformore information.AppliestoFigure20 throughFigure23. Copyright© 2004–2011,Texas InstrumentsIncorporated SubmitDocumentationFeedback 9 ProductFolderLink(s):PTN78020W PTN78020H

R =□54.9□kSET /c87 /c180 1.25 V V -□VO min -□RP PTN78020W PTN78020H SLTS228C –DECEMBER 2004–REVISED AUGUST 2011 www.ti.com

APPLICATION INFORMATION

AdjustingtheOutput VoltageofthePTN78020x SeriesofWide-Output AdjustPower Modules General A resistormust be connectedbetween theVO Adjustcontrol(pin4) and GND (pin7) tosettheoutputvoltage. The adjustmentrangeisfrom2.5V to12.6V forPTN78020W. The adjustmentrangeisfrom11.85V to22 V for PTN78020H. Ifpin4 isleftopen,theoutputvoltagedefaultstothelowestvalue. Table 2 givesthe preferredvalueof the externalresistorfora number of standardvoltages,withthe actual outputvoltagethatthevalueprovides.For otheroutputvoltages,thevalueoftherequiredresistorcan eitherbe calculatedusingEquation1 and the constantsforthe applicableproductin Table 1. Figure24 shows the placementoftherequiredresistor. (1) Table1.R SET Formula Constants PRODUCT VMIN R P PTN780x0W 2.5V 6.49kΩ PTN780x0H 11.824V 6.65kΩ InputVoltageConsiderations The PTN78020 isa step-downswitchingregulator.In orderthatthe outputremains in regulation,the input voltagemust exceed theoutputby a minimum differentialvoltage. Anotherconsiderationisthepulsewidthmodulation(PWM) range oftheregulator'sinternalcontrolcircuit.For stableoperation,itsoperatingdutycycleshouldnotbe lowerthansome minimum percentage.Thisdefinesthe maximum advisableratiobetween theregulatorinputand outputvoltagemagnitudes. As an example,forsatisfactoryperformance,theoperatinginputvoltagerangeofthePTN78020x must adhereto thefollowingrequirements. 1. For PTN78020W outputvoltageslowerthan10 V, theminimum inputvoltageis(VO + 2 V) or7 V, whichever ishigher. 2. ForPTN78020W outputvoltagesequalto10 V and higher,theminimum inputvoltageis(VO + 2.5V) . 3. ForPTN78020W, themaximum inputvoltageis(10× VO )or36 V,whicheverisless. 4. ForPTN78020H outputvoltageslowerthan19 V,theminimum inputvoltageis(VO + 3 V) or15 V,whichever ishigher. 5. ForPTN78020H outputvoltagesequalto19 V and higher,theminimum inputvoltageis(VO + 4 V) . Table2 givestheoperatinginputvoltagerange forthecommon outputbus voltages.Inaddition,theElectrical Characteristicstabledefinestheavailableoutputvoltageadjustrangeforvariousinputvoltages. Table2.Standard Values ofR set forCommon Output Voltages VO R SET VO OperatingPRODUCT (Required) (StandardValue) (Actual) VIRange 2.5V Open 2.5V 7 V to25 V 3.3V 78.7kΩ 3.306V 7 V to33 V PTN780x0W 5 V 21 kΩ 4.996V 7 V to36 V 12 V 732 Ω 12.002V 14.5V to36 V 12 V 383 kΩ 12.000V 15 V to36 V 15 V 15 kΩ 14.994V 18 V to36 V PTN780x0H 18 V 4.42kΩ 18.023V 21 V to36 V 22 V 95.3 21.998V 26 V to36 V

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0 .05 W 1 % CO

330 F/c109

C 2.2 F Ceramic I /c109 GND PTN78020W PTN78020H www.ti.com SLTS228C –DECEMBER 2004–REVISED AUGUST 2011 (1) A 0.05-W ratedresistormay be used.The toleranceshouldbe 1%, witha temperaturestabilityof100 ppm/°C (or better).Placetheresistoras closetotheregulatoras possible.Connect theresistordirectlybetween pins4 and 7 usingdedicatedPCB traces. (2) Never connectcapacitorsfromVO AdjusttoeitherGND orVO .Any capacitanceadded totheVO Adjust pinaffectsthestabilityoftheregulator. Figure24. PTN78020W VO AdjustResistorPlacement Table3.PTN78020W Output VoltageSet-PointResistorValues VO (V) R SET (kΩ) VO (V) R SET (kΩ) VO (V) R SET (kΩ) VO (V) R SET (kΩ) Copyright© 2004–2011,Texas InstrumentsIncorporated SubmitDocumentationFeedback 11 ProductFolderLink(s):PTN78020W PTN78020H

0.05 W CO C 4□x□4.7 F Ceramic I /c109 GND PTN78020W PTN78020H SLTS228C –DECEMBER 2004–REVISED AUGUST 2011 www.ti.com (1) A 0.05-W ratedresistormay be used.The toleranceshouldbe 1%, witha temperaturestabilityof100 ppm/°C (or better).Placetheresistoras closetotheregulatoras possible.Connect theresistordirectlybetween pins4 and 7 usingdedicatedPCB traces. (2) Never connectcapacitorsfromVO AdjusttoeitherGND orVO .Any capacitanceadded totheVO Adjust pinaffectsthestabilityoftheregulator. Figure25. PTN78020H VO AdjustResistorPlacement Table4.PTN78020H Output VoltageSet-PointResistorValues VO R SET VO R SET VO R SET

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www.ti.com SLTS228C –DECEMBER 2004–REVISED AUGUST 2011 CAPACITOR RECOMMENDATIONS forthePTN78020 WIDE-OUTPUT ADJUST POWER MODULES PTN78020W InputCapacitor The minimum requirementfortheinputcapacitanceisa 2.2-µF ceramiccapacitorforPTN78020W, ineithera X5R or X7R temperaturecharacteristic.Ceramic capacitorsshouldbe locatedwithin0.5inch(1,27cm) ofthe regulator'sinputpins.Electrolyticcapacitorscan be used attheinput,butonlyinadditiontotherequiredceramic capacitance.The minimum ripplecurrentratingforany nonceramiccapacitancemust be atleast500 mA rms for VO ≤ 5.5.ForVO > 5.5V,theminimum ripplecurrentratingis750 mA rms.The ripplecurrentratingofelectrolytic capacitorsisa major considerationwhen theyare used at the input.Thisripplecurrentrequirementcan be reducedby placingmore ceramiccapacitorsattheinput,inadditiontotheminimum required2.2µF. Tantalumcapacitorsare notrecommended foruse attheinputbus,as none were foundtomeet theminimum voltageratingof 2 × (maximum dc voltage+ ac ripple).Thisvoltagederatingisstandardpracticeforregular tantalumcapacitorstoensurereliability.Polymer-tantalumcapacitorsaremore reliable,and areavailablewitha maximum ratingoftypically20 V.These can be used withinputvoltagesup to16 V. PTN78020H InputCapacitor The minimum requirementforPTN78020H theinputcapacitanceis18.8µF (4x4.7-µF) orequivalent.Ceramic capacitorsshouldbe locatedwithin0.5inch(1,27cm) oftheregulator'sinputpins.Electrolyticcapacitorscan be used attheinput,butonlyinadditiontotherequiredceramiccapacitance.The minimum ripplecurrentratingfor any nonceramiccapacitancemust be at least500 mA rms forVO ≤ 5.5.For VO > 5.5 V, the minimum ripple currentratingis750 mA rms.The ripplecurrentratingofelectrolyticcapacitorsisa majorconsiderationwhen theyareused attheinput. Tantalumcapacitorsarenotrecommended foruse attheinputbus,as none meet theminimum voltageratingof 2 × (maximum dc voltage+ ac ripple).Thisvoltagederatingisstandardpracticeforregulartantalumcapacitors toensurereliability.Polymer-tantalumcapacitorsare more reliable,and are availablewitha maximum ratingof typically20 V.These can be used withinputvoltagesup to16 V. PTN78020W/PTN78020H Output Capacitor The minimum capacitancerequiredtoensurestabilityisa 330 µF.Eitherceramicorelectrolytic-typecapacitors can be used.The minimum ripplecurrentratingforthenonceramiccapacitancemust be atleast250 mA rms. The stabilityofthemodule and voltagetolerancesarecompromised ifthecapacitorisnotplacedneartheoutput bus pins.A high-quality,computer-gradeelectrolyticcapacitorshouldbe adequate.A ceramiccapacitorcan be alsobe locatedwithin0.5inch(1,27cm) oftheoutputpin. For applicationswithloadtransients(sudden changes inloadcurrent),the regulatorresponseimproveswith additionalcapacitance.Additionalelectrolyticcapacitorsshould be locatedcloseto the load circuit.These capacitorsprovidedecouplingoverthefrequencyrange,2 kHz to150 kHz.Aluminum electrolyticcapacitorsare suitableforambienttemperaturesabove 0°C. For operationbelow 0°C, tantalumorOs-Con typecapacitorsare recommended. When usingone or more nonceramiccapacitors,the calculatedequivalentESR shouldbe no lowerthan10 m Ω (17 m Ω usingthemanufacturer'smaximum ESR fora singlecapacitor).A listofcapacitors and vendorsareidentifiedinTable5 and Table6,therecommended capacitortables. Ceramic Capacitors Above 150 kHz, theperformanceofaluminum electrolyticcapacitorsbecomes lesseffective.To furtherreduce thereflectedinputripplecurrent,ortheoutputtransientresponse,multilayerceramiccapacitorsmust be added. Ceramic capacitorshave low ESR and theirresonantfrequencyishigherthanthebandwidthoftheregulator. When placedattheoutput,theircombined ESR isnotcriticalas longas thetotalvalueofceramiccapacitance does not exceed 300 µF. Also,to preventthe formationof localresonances,do not placemore than three identicalceramiccapacitorswithvaluesof10 µF orgreaterinparallel. Copyright© 2004–2011,Texas InstrumentsIncorporated SubmitDocumentationFeedback 13 ProductFolderLink(s):PTN78020W PTN78020H

SLTS228C –DECEMBER 2004–REVISED AUGUST 2011 www.ti.com Tantalum Capacitors Tantalum-typecapacitorsmay be used attheoutput,and arerecommended forapplicationswhere theambient operatingtemperature can be less than 0°C. The AVX TPS, Sprague 593D/594/595, and Kemet T495/T510/T520capacitorsseriesaresuggestedovermany othertantalumtypesdue totheirratedsurge,power dissipation,and ripplecurrentcapability.As a caution,many general-purposetantalumcapacitorshave considerablyhigherESR, reduced power dissipation,and lowerripplecurrentcapability.These capacitorsare alsolessreliableas theyhave lowerpower dissipationand surgecurrentratings.Tantalumcapacitorsthatdo not have a statedESR or surge currentratingare not recommended forpower applications.When specifying Os-Con and polymer-tantalumcapacitorsfortheoutput,theminimum ESR limitisencounteredwellbeforethe maximum capacitancevalueisreached. CapacitorTable The capacitortables,Table5 and Table6,identifiesthecharacteristicsofcapacitorsfroma number ofvendors withacceptableESR and ripplecurrent(rms)ratings.The recommended number ofcapacitorsrequiredatboth theinputand outputbuses isidentifiedforeach capacitortype.Thisisnotan extensivecapacitorlist.Capacitors from othervendorsare availablewithcomparablespecifications.Those listedare forguidance.The rms rating and ESR (at100 kHz) arecriticalparametersnecessarytoensurebothoptimum regulatorperformanceand long capacitorlife. DesigningforLoad Transients The transientresponse of the dc/dcconverterhas been characterizedusinga load transientwitha di/dtof 1 A/µs.The typicalvoltagedeviationforthisloadtransientisgiveninthedatasheetspecificationtableusingthe requiredvalueof outputcapacitance.As the di/dtof a transientisincreased,the response of a converter's regulationcircuitultimatelydepends on itsoutputcapacitordecouplingnetwork.Thisisan inherentlimitationof any dc/dcconverteronce the speed of the transientexceeds itsbandwidthcapability.Ifthe targetapplication specifiesa higherdi/dtor lower voltagedeviation,the requirementcan only be met withadditionaloutput capacitordecoupling.In these cases,specialattentionmust be paid to the type,value,and ESR of the capacitorsselected. Table5.Recommended Input/OutputCapacitors(PTN78020W) CAPACITOR CHARACTERISTICS QUANTITY 85°CCAPACITOR VENDOR/ EQUIVALENT VENDORWORKING MAXIMUM PHYSICALCOMPONENT VALUE SERIES INPUT OUTPUT NUMBERVOLTAGE RIPPLE SIZESERIES (µF) RESISTANCE BUS BUS(V) CURRENT (mm)(ESR) (Ω) (mArms) PanasonicFC( Radial) 35 330 0.068 1050 10 × 16 1 1 EEUFC1V331 (VI< 30 V) FK (SMD) 50 330 0.12 900 12,5× 13,5 1 (1) 1 EEVFK1H331Q UnitedChemi-Con PXA (SMD) 16 330 0.014 4360 10 × 12,2 ≤1 PXA16VC331MJ12TP1 (1) (VI< 14 V) PS 16 330 0.014 5500 10 × 12,5 1 (1) ≤ 1 16PS330M J12 (VI< 14 V) LXZ 35 220 0.090 760 10 × 12,5 2 LXZ35VB221M10X12LL1(1) (VI< 30 V) MVZ(SMD) 25 470 0.09 670 10 × 10 1 1 MVZ25VC471MJ10TP (VI< 24 V) (VO ≤ 5.5V) NichiconUWG (SMD) 35 330 0.15 670 10 × 10 1 1 UWG1V331MNR1GS SP 20 180 0.032 4280 10 ×10.5 2 (1) ≤ 2 20SP180M (VI~VO ≤ 16 V) Sanyo Os-Con SVP (SMD) 16 330 0.020 4700 10 × 12,7 1 (1) ≤ 1 16SVP330M (VI ≤ 14 V) SP 20 180 0.032 4280 10 ×10.5 2 (1) ≤ 2 20SP180M (VI ≤ 16 V) 20 100 0.085 1543 7,3L × 4,3 N/R (2) ≤ 3 TPSV107M020R0085 W × 4,1H (VO ≤ 10 V) AVX TantalumTPS (SMD) 20 100 0.200 > 817 3225 N/R (2) ≤ 3 TPSE107M020R0200 (VO ≤ 10 V) (1) The voltageratingoftheinputcapacitormust be selectedforthedesiredoperatinginputvoltagerangeoftheregulator.To operatethe regulatorata higherinputvoltage,selecta capacitorwiththenexthighervoltagerating. (2) Not recommended (N/R).The voltageratingdoes notmeet theminimum operatinglimitsinmost applications.

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www.ti.com SLTS228C –DECEMBER 2004–REVISED AUGUST 2011 Table5.Recommended Input/OutputCapacitors(PTN78020W) (continued) CAPACITOR CHARACTERISTICS QUANTITY 85°CCAPACITOR VENDOR/ EQUIVALENT VENDORWORKING MAXIMUM PHYSICALCOMPONENT VALUE SERIES INPUT OUTPUT NUMBERVOLTAGE RIPPLE SIZESERIES (µF) RESISTANCE BUS BUS(V) CURRENT (mm)(ESR) (Ω) (mArms) Kemet X5R Ceramic 6.3 47 0.002 >1000 3225 N/R (3) ≤ 4 C1210C476K9PAC (VO ≤ 5.5V) TDK X5R Ceramic 6.3 47 0.002 >1000 3225 N/R (3) ≤ 4 C3225X5R0J476MT (VO ≤ 5.5V) MurataX5R Ceramic 6.3 47 0.002 >1000 3225 N/R (3) ≤ 4 GRM42-2X5R476M6.3 (VO ≤ 5.5V) MurataX7R Ceramic 50 4.7 0.002 >1000 3225 ≥ 1 1 GRM32ER71H475KA88L TDK X7R Ceramic 50 2.2 0.002 >1000 3225 ≥ 1 1 C3225X7R1H225KT TDK X7R Ceramic 25 2.2 0.002 >1000 3225 ≥ 1 (4) 1 C3225X7R1E225KT/MT (VI~VO ≤ 20 V) Kemet X7R Ceramic 25 2.2 0.002 >1000 3225 ≥ 1 (4) 1 C1210C225K3RAC (VO ≤ 20 V) AVX X7R Ceramic 25 2.2 0.002 >1000 3225 ≥ 1 (4) 1 C12103C225KAT2A (VO ≤ 20 V) TDK X7R Ceramic 50 1.0 0.002 >1000 3225 ≥ 2 (5) 1 C3225X7R1H105KT Kemet X7R Ceramic 50 1.0 0.002 >1000 3225 ≥ 2 (5) 1 C1210C105K5RAC Kemet RadialThrough-hole 50 1.0 0.002 >1000 5,08× 7,62 ≥ 2 (5) 1 C330C105K5R5CA × 9,14H MurataRadialThrough-hole 50 2.2 0.004 >1000 10 H × 10 ≥ 1 1 RPER71H2R2KK6F03 W × 4 D (3) The voltageratingoftheinputcapacitormust be selectedforthedesiredoperatinginputvoltagerangeoftheregulator.To operatethe regulatorata higherinputvoltage,selecta capacitorwiththenexthighervoltagerating. (4) The maximum ratingoftheceramiccapacitorlimitstheregulatoroperatinginputvoltageto20 V.Selecta alternativeceramic component tooperateata higherinputvoltage. (5) A totalcapacitanceof2 µF isan acceptablereplacementvaluefora single2.2-µF ceramiccapacitor Copyright© 2004–2011,Texas InstrumentsIncorporated SubmitDocumentationFeedback 15 ProductFolderLink(s):PTN78020W PTN78020H

SLTS228C –DECEMBER 2004–REVISED AUGUST 2011 www.ti.com Table6.Recommended Input/OutputCapacitors(PTN78020H) CAPACITOR CHARACTERISTICS QUANTITY 85°CCAPACITOR VENDOR/ EQUIVALENT VENDORWORKING MAXIMUM PHYSICALCOMPONENT VALUE SERIES INPUT OUTPUT NUMBERVOLTAGE RIPPLE SIZESERIES (µF) RESISTANCE BUS BUS(V) CURRENT (mm)(ESR) (Ω) (mArms) PanasonicFC( Radial) 35 330 0.068 1050 10 × 16 1 1 EEUFC1V331 (VI< 30 V) FK (SMD) 50 330 0.12 900 12,5× 13,5 1 (1) 1 EEVFK1H331Q LXZ 35 220 0.09 760 10 × 12,5 2 LXZ35VB2231M10X12LL1(1) (VI< 30 V) MVY(SMD) 35 220 0.15 670 10 × 10 1 2 MVY35VC221M10X10TP (VI< 30 V) NichiconUWG (SMD) 35 330 0.15 670 10 × 10 1 1 UWG1V331MNR1GS (VI< 30 V) Sanyo Os-Con SP (SMD 20 180 0.032 4280 10 ×10.5 2 (1) ≤ 2 20SP180M (VI~ VO ≤ 16 V) TDK X7R Ceramic 25 2.2 0.002 >1000 3225 ≥ 8 (2) 1 C3225X7R1E225KT/MT (VO ≤ 20 V) MurataX7R Ceramic 25 2.2 0.002 >1000 3225 ≥ 8 (2) 1 GRM32RR71E225K (VO ≤ 20 V) Kemet X7R Ceramic 25 2.2 0.002 >1000 3225 ≥ 8 (2) 1 C1210C225K3RAC (VO ≤ 20 V) AVX X7R Ceramic 25 2.2 0.002 >1000 32225 ≥ 8 (2) 1 C12103C225KAT2A (VO ≤ 20 V) MurataX7R Ceramic 50 4.7 0.002 >1000 3225 ≥ 4 1 GRM32ER71H475KA88L TDK X7R Ceramic 50 3.3 0.002 >1000 3225 ≥ 6 1 CKG45NX7R1H335M MurataRadialThrough-hole 50 3.3 0.004 >1000 12,5H x ≥ 6 1 RPER71H3R3KK6F03 12,5W x 4 D Kemet RadialThrough-hole 50 4.7 0.002 >1000 5,08× 7,62 ≥ 4 (3) 1 C350C475K5R5CA × 9,14H (1) The voltageratingoftheinputcapacitormust be selectedforthedesiredoperatinginputvoltagerangeoftheregulator.To operatethe regulatorata higherinputvoltage,selecta capacitorwiththenexthighervoltagerating. (2) The maximum ratingoftheceramiccapacitorlimitstheregulatoroperatinginputvoltageto20 V.Selecta alternativeceramic component tooperateata higherinputvoltage. (3) A totalcapacitanceof2 µF isan acceptablereplacementvaluefora single2.2-µF ceramiccapacitor Output VoltageSense An externaloutputvoltagesense improvesthe load regulationperformanceof the module by enablingitto compensate forany IR-voltagedropbetween themodule and theloadcircuit.Thisvoltagedropiscaused by the flowofcurrentthroughtheresistanceintheprinted-circuitboardconnections. To use theoutputvoltagesense feature,simplyconnecttheVO Sense input(pin5) toVO ,closetothedevice thatdraws themost supplycurrent.Ifan externalvoltagesense isnotdesired,theVO Sense inputmay be left open circuit.An internalresistor(15 Ω or less),connectedbetween thisinputand VO ,ensuresthattheoutput remainsinregulation. WithVO Sense connected,thedifferencebetween thevoltagemeasured directlybetween theVO and GND, and thatmeasured from VO Sense to GND, representsthe amount of IR-voltagedrop beingcompensated by the regulator.Thisshouldbe limitedtoa maximum of0.3V. Note: The externalvoltagesense is not designed to compensate for the forwarddrop of nonlinearor frequency-dependentcomponents thatmay be placedinserieswiththe regulator'soutput.Examples include OR-ing diodes,filterinductors,ferritebeads,and fuses.When thesecomponents are enclosedby theexternal sense connection,theyare effectivelyplacedinsidethe regulationcontrolloop.Thiscan adverselyaffectthe stabilityofthemodule. UndervoltageLockout The undervoltagelockout(UVLO) circuitpreventsthemodule fromattemptingtopower up untiltheinputvoltage isabove theUVLO threshold.Thisistopreventthemodule fromdrawingexcessivecurrentfromtheinputsource atpower up.Below theUVLO threshold,themodule isheldoff.

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VI (5□V/div) VO (2□V/div) II (2 A/div) PTN78020W PTN78020H www.ti.com SLTS228C –DECEMBER 2004–REVISED AUGUST 2011 Power-Up Characteristics When configuredperthestandardapplication,thePTN78020 power module producesa regulatedoutputvoltage followingtheapplicationofa validinputsourcevoltage.Duringpower up,internalsoft-startcircuitryslowsthe ratethattheoutputvoltagerises,therebylimitingtheamount ofin-rushcurrentthatcan be drawn fromtheinput source.The soft-startcircuitryintroducesa shorttime delay (typically5 ms – 10 ms) intothe power-up characteristic.This isfrom the pointthata validinputsource isrecognized.Figure26 shows the power-up waveforms fora PTN78020W, operatingfrom a 12-V inputand withthe outputvoltageadjustedto 5 V. The waveformswere measured witha 1.5-Aresistiveload. Figure26. Power-Up Waveforms Current-LimitProtection The PTN78020 modules protectagainstloadfaultswitha continuouscurrentlimitcharacteristic.Under a load faultcondition,theoutputcurrentcannotexceed thecurrentlimitvalue.Attemptingtodraw currentthatexceeds the current-limitvaluecauses the module to progressivelyreduce itsoutputvoltage.Currentiscontinuously suppliedto the faultuntilitisremoved. On removalof the fault,the outputvoltagepromptlyrecovers.When limitingoutputcurrent,theregulatorexperienceshigherpower dissipation,whichincreasesitstemperature.Ifthe temperatureincreaseisexcessive,themodule overtemperatureprotectionbeginstoperiodicallyturntheoutput voltagecompletelyoff. OvertemperatureProtection A thermalshutdown mechanism protectsthemodule'sinternalcircuitryagainstexcessivelyhightemperatures.A riseintemperaturemay be theresultofa dropinairflow,a highambienttemperature,ora sustainedcurrentlimit condition.Ifthe junctiontemperatureof the internalcontrolIC risesexcessively,the module turnsitselfoff, reducingtheoutputvoltagetozero.The module instantlyrestartswhen thesensed temperaturedecreasesby a few degrees. Overtemperatureprotectionisa lastresortmechanism topreventdamage tothemodule.Itshouldnotbe relied on as permanent protectionagainstthermalstress.Always operatethe module withinitstemperaturederated limits,fortheworst-caseoperatingconditionsofoutputcurrent,ambienttemperature,and airflow.Operatingthe module above theselimits,albeitbelow thethermalshutdown temperature,reducesthelong-termreliabilityof themodule. Copyright© 2004–2011,Texas InstrumentsIncorporated SubmitDocumentationFeedback 17 ProductFolderLink(s):PTN78020W PTN78020H

(Ceramic) PTN78020 1 4 AdjustGND VOVI VI =□12□V VO =□5□V Inhibit Sense BSS□138 L O A D 21□k CI

2.2 F/c109

0.05□W VO (2□V/div) II (2 A/div) Q1□VGS (10□V/div) PTN78020W PTN78020H SLTS228C –DECEMBER 2004–REVISED AUGUST 2011 www.ti.com Output On/OffInhibit For applicationsrequiringoutputvoltageon/offcontrol,the PTN78020 power module incorporatesan output on/offInhibitcontrol(pin3).The inhibitfeaturecan be used wherever thereisa requirementforthe output voltagefromtheregulatortobe turnedoff. The power module functionsnormallywhen the Inhibitpin is leftopen-circuit,providinga regulatedoutput whenever a validsourcevoltageisconnectedtoVI withrespecttoGND. Figure27 shows thethecircuitused to demonstratethe inhibitfunction.Note the discretetransistor(Q1).TurningQ1 on appliesa low voltageto the Inhibitcontrolpin and turnsthe module off.The outputvoltagedecays as the load circuitdischargesthe capacitance.The currentdrawn attheinputisreducedtotypically17 mA. IfQ1 isthenturnedoff,themodule executesa soft-startpower up.A regulatedoutputvoltageisproducedwithin20 ms. Figure28 shows thetypical riseintheoutputvoltage,followingtheturnoffofQ1. The turnoffofQ1 correspondstothefallinthewaveform, Q1 Vgs.The waveformswere measured witha 1.5-Aresistiveload. Figure27. On/OffInhibitControlCircuit Figure28. Power Up Response From InhibitControl

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UDG−06049 VOVI VOVI Inhibit 1 µF 50 V Ceramic 2.2 µF 50 V Ceramic (Required) 330 µF (Required) 1 µF CeramicR SET (2) (1) (1) PTN78020W PTN78020H www.ti.com SLTS228C –DECEMBER 2004–REVISED AUGUST 2011 OptionalInput/OutputFilters Power modules includeinternalinputand outputceramiccapacitorsin allof theirdesigns.However, some applicationsrequiremuch lowerlevelsofeitherinputreflectedor outputripple/noise.Thisapplicationdescribes variousfiltersand designtechniquesfoundtobe successfulinreducingbothinputand outputripple/noise. Input/OutputCapacitors The easiestway toreduceoutputrippleand noiseistoadd one or more 1-μF ceramiccapacitors,such as C4 shown inFigure29. Ceramic capacitorsshouldbe placedcloseto the outputpower terminals.A single1-μF capacitorreducestheoutputripple/noiseby 10% to30% formodules witha ratedoutputcurrentoflessthan3 A. (Note:C3 isrequiredtoimprovetheregulatortransientresponse,and does notreduceoutputrippleand noise.) Switchingregulatorsdraw currentfrom the inputlinein pulsesat theiroperatingfrequency.The amount of reflected(input)ripple/noisegeneratedisdirectlyproportionaltotheequivalentsourceimpedance ofthepower sourceincludingtheimpedance ofany inputlines.The additionofC1, minimum 2.2-μF ceramiccapacitor,near theinputpower pins,reducesreflectedconductedripple/noiseby 30% to50%. (1) See thespecificationsforrequiredvalueand type.ForthePTN78020H, C2 = 4 × 4.7μF. (2) See theApplicationInformationsectionforsuggetedvalueand type. Figure29. Adding High-FrequencyBypass CapacitorsTo The Inputand Output π Filters Ifa furtherreductioninripple/noiselevelisrequiredforan application,higherorderfiltersmust be used.A π (pi) filter,employinga ferritebead (Fair-Ritepartnumber 2773021447 orequivalent)inserieswiththeinputoroutput terminalsoftheregulatorreducestheripple/noiseby atleast20 db (seeFigure30 and Figure31).Inorderfor theinductortobe effectiveinreductionofrippleand noise,ceramiccapacitorsarerequired.(Note:see Capacitor Recommendations forthePTN78020W foraddtionalinformationon vendorsand component suggestions.) These inductorsplus ceramic capacitorsform an excellentfilterbecause of the rejectionat the switching frequency(650kHz -1 MHz). The placementofthisfilteriscritical.Itmust be locatedas closeas possibletothe inputoroutputpinstobe efffective.The ferritebead issmall(12.5mm × 3 mm), easy touse,low cost,and has low dc resistance.Fair-Ritealsomanufacturesa surfacemount bead (partnumber 2773021447),throughhole (partnumber 2673000701) ratedto5 A, butinthisapplication,itiseffectiveto6 A on theoutputbus.1-µH to 5-µH inductorscan be used inplaceoftheferriteinductorbead. Copyright© 2004–2011,Texas InstrumentsIncorporated SubmitDocumentationFeedback 19 ProductFolderLink(s):PTN78020W PTN78020H

1 µF Ceramic UDG−06050 2.2 µF 50 V Ceramic 330 µF 50 V (Optional) R SET 100 µF VI VI PTN78020W 2 6 7 4 Vo Inhibit GND Adjust Vo Sense GNDGND GND 2.2 µF 50 V Ceramic (Required) 330 µF (Required)(2) (3)(4) 1−5 µH (1) 1−5 µH 0 0.5 1 1.5 2 2.5 3

1 MHz

Attenuation − dB Load Current − A PTN78020W PTN78020H SLTS228C –DECEMBER 2004–REVISED AUGUST 2011 www.ti.com (1) See thespecificationsforrequiredvalueand type.ForthePTN78020H, C3 = 4 × 4.7μF. (2) See theApplicationInformationsectionforsuggetedvalueand type. (3) Recommended whenever IO > 2A. (4) ForPTN78020H, C1 ≤ 4.7μF. Figure30. Adding π Filters(IO ≤ 3 A) Figure31. π-FilterAttenuationvs.Load Current

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1 µF Ceramic UDG−05089 1 µF 50 V Ceramic 330 µF 50 V (Optional) R SET 100 µF VI VI 2.2 µF 50 V Ceramic (Required) 330 µF (Required) PTN78020W 2 6 7 4 Inhibit GND Adjust Sense GNDGND GND 1 µH to 5 µH 1 µH to 5 µH 1 µH to 5 µH (1) (2) (3)(1) VO VO PTN78020W PTN78020H www.ti.com SLTS228C –DECEMBER 2004–REVISED AUGUST 2011 (1) See thespecificationsforrequiredvalueand type.ForthePTN78020H, C2 = 4 × 4.7μF. (2) See theApplicationInformationsectionforsuggetedvalueand type. (3) Recommended whenever IO > 2A. (4) ForPTN78020H, C1 ≥ 4.7μF. Figure32. Adding π Filters(IO = 3 A to6 A) Copyright© 2004–2011,Texas InstrumentsIncorporated SubmitDocumentationFeedback 21 ProductFolderLink(s):PTN78020W PTN78020H

SLTS228C –DECEMBER 2004–REVISED AUGUST 2011 www.ti.com

REVISION HISTORY

Changes from RevisionB (APRIL 2008)toRevisionC Page

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ProductFolderLink(s):PTN78020W PTN78020H

www.ti.com 2-Jun-2025 PACKAGING INFORMATION Orderable part number Status (1) Material type (2) Package | Pins Package qty | Carrier RoHS (3) Lead finish/ Ball material (4) MSL rating/ Peak reflow (5) Op temp (°C) Part marking (6) PTN78020HAH Active Production Through-Hole Module (EUK) | 7 20 | TIW TRAY In-Work SN N/A for Pkg Type -40 to 85 PTN78020HAH.B Active Production Through-Hole Module (EUK) | 7 20 | TIW TRAY In-Work SN N/A for Pkg Type -40 to 85 PTN78020HAS Active Production Surface Mount Module (EUL) | 7 20 | TIW TRAY No SNPB Level-1-235C-UNLIM/ Level-3-260C-168HRS -40 to 85 PTN78020HAS.B Active Production Surface Mount Module (EUL) | 7 20 | TIW TRAY No SNPB Level-1-235C-UNLIM/ Level-3-260C-168HRS -40 to 85 PTN78020HAZ Active Production Surface Mount Module (EUL) | 7 20 | TIW TRAY In-Work SNAGCU Level-3-260C-168 HR -40 to 85 PTN78020HAZ.B Active Production Surface Mount Module (EUL) | 7 20 | TIW TRAY In-Work SNAGCU Level-3-260C-168 HR -40 to 85 PTN78020WAD Active Production Through-Hole Module (EUK) | 7 20 | TIW TRAY In-Work SN N/A for Pkg Type -40 to 85 PTN78020WAD.B Active Production Through-Hole Module (EUK) | 7 20 | TIW TRAY In-Work SN N/A for Pkg Type -40 to 85 PTN78020WAH Active Production Through-Hole Module (EUK) | 7 20 | TIW TRAY In-Work SN N/A for Pkg Type -40 to 85 PTN78020WAH.B Active Production Through-Hole Module (EUK) | 7 20 | TIW TRAY In-Work SN N/A for Pkg Type -40 to 85 PTN78020WAS Active Production Surface Mount Module (EUL) | 7 20 | TIW TRAY No SNPB Level-1-235C-UNLIM/ Level-3-260C-168HRS -40 to 85 PTN78020WAS.B Active Production Surface Mount Module (EUL) | 7 20 | TIW TRAY No SNPB Level-1-235C-UNLIM/ Level-3-260C-168HRS -40 to 85 PTN78020WAZ Active Production Surface Mount Module (EUL) | 7 20 | TIW TRAY In-Work SNAGCU Level-3-260C-168 HR -40 to 85 PTN78020WAZ.B Active Production Surface Mount Module (EUL) | 7 20 | TIW TRAY In-Work SNAGCU Level-3-260C-168 HR -40 to 85 PTN78020WAZT Active Production Surface Mount Module (EUL) | 7 200 | SMALL T&R In-Work SNAGCU Level-3-260C-168 HR -40 to 85 PTN78020WAZT.B Active Production Surface Mount Module (EUL) | 7 200 | SMALL T&R In-Work SNAGCU Level-3-260C-168 HR -40 to 85 (1) Status: For more details on status, see our product life cycle. Addendum-Page 1

www.ti.com 2-Jun-2025 (2) Material type: When designated, preproduction parts are prototypes/experimental devices, and are not yet approved or released for full production. Testing and final process, including without limitation quality assurance, reliability performance testing, and/or process qualification, may not yet be complete, and this item is subject to further changes or possible discontinuation. If available for ordering, purchases will be subject to an additional waiver at checkout, and are intended for early internal evaluation purposes only. These items are sold without warranties of any kind. (3) RoHS values: Yes, No, RoHS Exempt. See the TI RoHS Statement for additional information and value definition. (4) Lead finish/Ball material: Parts may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead finish/Ball material values may wrap to two lines if the finish value exceeds the maximum column width. (5) MSL rating/Peak reflow: The moisture sensitivity level ratings and peak solder (reflow) temperatures. In the event that a part has multiple moisture sensitivity ratings, only the lowest level per JEDEC standards is shown. Refer to the shipping label for the actual reflow temperature that will be used to mount the part to the printed circuit board. (6) Part marking: There may be an additional marking, which relates to the logo, the lot trace code information, or the environmental category of the part. Multiple part markings will be inside parentheses. Only one part marking contained in parentheses and separated by a "~" will appear on a part. If a line is indented then it is a continuation of the previous line and the two combined represent the entire part marking for that device. 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. Addendum-Page 2

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