TLV62065DSGT

TLV62065DSGT TI | Alldatasheet

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Efficiency - % I - Load Current - AL V = 4.2 VIN V = 5 VIN V = 3.7 VIN L = 1.2 H (NRG4026T 1R2), C = 22 F (0603 size), V = 3.3 V, Mode: Auto PFM/PWM /c109 /c109OUT OUT TYPICAL APPLICATION CIRCUIT L 1.0 H /c109 C 10 F OUT /c109 V = 2.9 V to 5.5 VIN C 22 pF ff R 180 k /c87 R 360 k /c87C IN /c109F PVIN PGND EN FB TL V62065 SW A VIN AGND V

1.8 V 2 A

www.ti.com SLVSAC4A –NOVEMBER 2010–REVISED JULY 2012 3-MHz2AStepDownConverterin2x2SONPackage Check forSamples: TLV62065 1FEATURES

DESCRIPTION

2• VIN Range from 2.9Vto5.5V The TLV62065 isa high efficientsynchronousstep• Up to97% Efficiency down DC-DC converter.Itprovidesup to2.0A output

• Power Save Mode /3MHz FixedPWM Mode current.
• Output VoltageAccuracy inPWM Mode ±2.0% With an inputvoltagerange of 2.9V to 5.5V the
• Output CapacitorDischargeFunction deviceisa perfectfitforpower conversionfroma 5V or 3.3V system supplyrail.The TLV62065 operates• Typical18 µA QuiescentCurrent at 3MHz fixedfrequencyand entersPower Save• 100% Duty Cycle forLowest Dropout Mode operationatlightloadcurrentstomaintainhigh
• For Improved FeatureSet See TPS62065 efficiencyovertheentireloadcurrentrange.For low noiseapplications,TLV62065 can be forcedintofixed• Availableina 2x2x0.75mm SON frequencyPWM mode by pullingtheMODE pinhigh. APPLICATIONS In the shutdown mode, the currentconsumptionis reduced to less than 1µA and an internalcircuit• PointOf Load (POL) dischargestheoutputcapacitor.• Notebooks, Pocket PCs TLV62065 operateswitha 1.0µH inductorand 10µF• PortableMedia Players outputcapacitor.• Set Top Box The TLV62065 isavailableina small2x2x0.75mm 8- pinSON package. Pleasebe aware thatan importantnoticeconcerningavailability,standardwarranty,and use incriticalapplicationsof Texas Instrumentssemiconductorproductsand disclaimerstheretoappearsattheend ofthisdatasheet. 2PowerPAD isa trademarkofTexas Instruments. PRODUCTION DATA informationiscurrentas ofpublicationdate. Copyright© 2010–2012,Texas InstrumentsIncorporatedProductsconform to specificationsper the terms of the Texas Instrumentsstandardwarranty.Productionprocessingdoes not necessarilyincludetestingofallparameters.

SLVSAC4A –NOVEMBER 2010–REVISED JULY 2012 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 (1) PART MAXIMUM OUTPUT PACKAGE PACKAGETA OUTPUT VOLTAGE ORDERING (2) NUMBER CURRENT DESIGNATOR MARKING –40°C to TLV62065 Adjustable 2.0A DSG TLV62065DSG QVB 85°C (1) Forthemost currentpackage and orderinginformation,see thePackage OptionAddendum attheend ofthisdocument,orsee theTI websiteatwww.ti.com. (2) The DSG (SON-8)packagesisavailableintapeon reel.Add R suffixtoorderquantitiesof3000 partsperreel. ABSOLUTE MAXIMUM RATINGS overoperatingfree-airtemperaturerange(unlessotherwisenoted)(1) VALUE UNIT MIN MAX VoltageRange (2) AVIN,PVIN –0.3 7 EN, MODE, FB –0.3to VIN +0.3< 7 V SW –0.3 7 Current(source) Peak output Internallylimited A ElectrostaticDischarge(HBM) QSS 009-105(JESD22-A114A)(3) 2 kV ElectrostaticDischarge(CDM) QSS 009-147(JESD22-C101B.01) 1 ElectrostaticDischarge(Machinemodel) 200 V TJ –40 125 °C Temperature Tstg –65 150 °C (1) Stressesbeyond thoselistedunderabsolutemaximum ratingsmay cause permanentdamage tothedevice.These arestressratings onlyand functionaloperationofthedeviceattheseorany otherconditionsbeyond thoseindicatedunderrecommended operating conditionsisnotimplied.Exposuretoabsolute-maximum-ratedconditionsforextendedperiodsmay affectdevicereliability. (2) Allvoltagevaluesarewithrespecttonetworkgroundterminal. (3) The human body model isa 100-pFcapacitordischargedthrougha 1.5-kΩ resistorintoeach pin.The machine model isa 200-pF capacitordischargeddirectlyintoeach pin. THERMAL INFORMATION TLV62065 THERMAL METRIC (1) DSG UNITS

8 PINS

θJA Junction-to-ambientthermalresistance 65.2 θJC(top) Junction-to-case(top)thermalresistance 93.3 θJB Junction-to-boardthermalresistance 30.1 °C/W ψJT Junction-to-topcharacterizationparameter 0.5 ψJB Junction-to-boardcharacterizationparameter 47.4 θJC(bottom) Junction-to-case(bottom)thermalresistance 7.2 (1) Formore informationabouttraditionaland new thermalmetrics,see theIC Package ThermalMetricsapplicationreport,SPRA953 .

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www.ti.com SLVSAC4A –NOVEMBER 2010–REVISED JULY 2012 RECOMMENDED OPERATING CONDITIONS MIN NOM MAX UNIT AV IN , Supplyvoltage 2.9 5.5 V PV IN Outputcurrentcapability 2000 mA Outputvoltagerangeforadjustablevoltage 0.8 VIN V L EffectiveInductanceRange 0.7 1.0 1.6 µH C OUT EffectiveOutputCapacitanceRange 4.5 10 22 µF TA Operatingambienttemperature(1) –40 85 °C TJ Operatingjunctiontemperature –40 125 °C (1) Inapplicationswhere highpower dissipationand/orpoorpackage thermalresistanceispresent,themaximum ambienttemperaturemay have tobe derated.Maximum ambienttemperature(TA(max))isdependenton themaximum operatingjunctiontemperature(TJ(max)),the maximum power dissipationofthedeviceintheapplication(PD(max)),and thejunction-to-ambientthermalresistanceofthe part/packageintheapplication(θJA),as givenby thefollowingequation:TA(max)= TJ(max)–(θJA X PD(max)) Copyright© 2010–2012,Texas InstrumentsIncorporated SubmitDocumentationFeedback 3 ProductFolderLink(s):TLV62065

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ELECTRICAL CHARACTERISTICS

Over fulloperatingambienttemperaturerange,typicalvaluesareatTA = 25°C. Unlessotherwisenoted,specificationsapply forconditionVIN = EN = 3.6V.Externalcomponents C IN = 10μF 0603,C OUT = 10μF 0603,L = 1.0μH, see theparameter measurement information. PARAMETER TEST CONDITIONS MIN TYP MAX UNIT SUPPLY VIN Inputvoltagerange 2.9 5.5 V IOUT = 0 mA, deviceoperatinginPFM modeIQ Operatingquiescentcurrent 18 μAand notdevicenotswitching ISD Shutdown current EN = GND, currentintoAVIN and PVIN combined 0.1 1 μA Falling 1.73 1.78 1.83 VUVLO Undervoltagelockoutthreshold V Rising 1.9 1.95 1.99 ENABLE, MODE VIH Highlevelinputvoltage 2.9V≤ VIN ≤ 5.5V 1.0 5.5 V VIL Low levelinputvoltage 2.9V≤ VIN ≤ 5.5V 0 0.4 V IIN Inputbiascurrent EN, Mode tiedtoGND orAVIN 0.01 1 μA POWER SWITCH VIN = 3.6V (1) 120 180 R DS(on) High-sideMOSFET on-resistance m Ω VIN = 5.0V(1) 95 150 VIN = 3.6V(1) 90 130 R DS(on) Low-sideMOSFET on-resistance m Ω VIN = 5.0V(1) 75 100 ForwardcurrentlimitMOSFETILIMF 3V ≤ VIN ≤ 3.6V 2300 2750 mAhigh-sideand low-side Thermalshutdown Increasingjunctiontemperature 150 TSD °C Thermalshutdownhysteresis Decreasingjunctiontemperature 10 OSCILLATOR fSW Oscillatorfrequency 2.9V≤ VIN ≤ 5.5V 2.6 3 3.4 MHz OUTPUT Vref Referencevoltage 600 mV PWM operation,MODE = VIN ,VFB(PWM) Feedback voltagePWM Mode –2.0 0 2.02.9V≤ VIN ≤ 5.5V,0 mA load Feedback voltagePFM mode, deviceinPFM mode, voltagepositioningactive(2) VFB(PFM) 1VoltagePositioning Load regulation -0.5 %/A VFB Lineregulation 0 %/V ActivatedwithEN = GND, 2.9V≤ VIN≤ 5.5V,0.8≤ 200R (Discharge) Internaldischargeresistor ΩVOUT ≤ 3.6V tSTART Start-uptime Time fromactiveEN toreach95% ofVOUT 500 μs (1) Maximum valueappliesforTJ = 85°C (2) InPFM mode, theinternalreferencevoltageissettotyp.1.01×Vref.See theparametermeasurement information.

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www.ti.com SLVSAC4A –NOVEMBER 2010–REVISED JULY 2012 PIN ASSIGNMENTS TERMINAL FUNCTIONS TERMINAL I/O DESCRIPTIONNO.NAME SON 2x2-8 PGND 1 PWR GND supplypinfortheoutputstage. Thisistheswitchpinand isconnectedtotheinternalMOSFET switches.ConnecttheSW 2 OUT externalinductorbetween thisterminaland theoutputcapacitor. AGND 3 IN AnalogGND supplypinforthecontrolcircuit. Feedback pinfortheinternalregulationloop.Connecttheexternalresistordividertothispin.FB 4 IN Incase offixedoutputvoltageoption,connectthispindirectlytotheoutputcapacitor Thisistheenablepinofthedevice.PullingthispintolowforcesthedeviceintoshutdownEN 5 IN mode. Pullingthispintohighenablesthedevice.Thispinmust be terminated MODE pin= highforcesthedevicetooperateinfixedfrequencyPWM mode. MODE pin= MODE 6 IN lowenablesthePower Save Mode withautomatictransitionfromPFM mode tofixed frequencyPWM mode. Thispinmust be terminated. AnalogVIN power supplyforthecontrolcircuit.Need tobe connectedtoPVIN and inputAV IN 7 IN capacitor. PV IN 8 PWR VIN power supplypinfortheoutputstage. Forgood thermalperformance,thisPAD must be solderedtothelandpatternon thepcb.Power PAD ThisPAD shouldbe used as deviceGND. Copyright© 2010–2012,Texas InstrumentsIncorporated SubmitDocumentationFeedback 5 ProductFolderLink(s):TLV62065

L: LQH44PN1R0NP0, L = 1.0 H,Murata, NRG4026T1R2, L = Taiyo Yuden C /C : GRM188R60J106U, Murata 0603 size 1.2 H, IN OUT /c109 /c109 L 1.0 H/1.2 H µ µV = 2.9 V to 5.5 VIN PVIN AVIN EN MODE AGND PGND SW FB Cff C 10 F OUT µ V up to 2.0 A OUT C 10 F IN µ TLV62065 Zero-Pole AMP. Integrator Error Amp. PFM Comparator PWM Comp. VREF Control Stage Gate Driver Anti Shoot-Through Current Limit Comparator Current Limit Comparator VREF FB SW EN AVIN Softstart VOUT RAMP CONTROL Thermal Shutdown Reference 0.6V VREF Undervoltage Lockout 1.8V Limit High Side Limit Low Side Sawtooth Generator FB AGND PVIN PGND 3MHz Clock RDischarge MODE TLV62065 SLVSAC4A –NOVEMBER 2010–REVISED JULY 2012 www.ti.com FUNCTIONAL BLOCK DIAGRAM Verticalspacer Verticalspacer PARAMETER MEASUREMENT INFORMATION

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Efficiency□-□% I -□Load□Current□- AL L =□1.2 H□(NRG4026T□1R2), C =□10 F□(0603□size), V =□1.8□V, Mode: Auto□PFM/PWM /c109 /c109OUT OUT V =□4.2□VIN V =□5□VIN V =□3.6□VIN V =□3.3□VIN V =□3□VIN I -□Load□Current□- AL 100 Efficiency□-□% V =□4.2□VIN V =□5□VIN V =□3.6□VIN V =□3.3□VIN V =□3□VIN L =□1.2 H□(NRG4026T□1R2), C =□10 F□(0603□size), V =□1.2□V, Mode: Auto□PFM/PWM /c109 /c109OUT OUT TLV62065 www.ti.com SLVSAC4A –NOVEMBER 2010–REVISED JULY 2012 TYPICAL CHARACTERISTICS Table1.TableofGraphs FIGURE Load Current,VOUT = 1.2V,AutoPF//PWM Mode, LinearScale Figure1 Load Current,VOUT = 1.8V,AutoPFM/PWM Mode, LinearScale Figure2 η Efficiency Load Current,VOUT = 3.3V,PFM/PWM Mode, LinearScale Figure3 Load Current,VOUT = 1.8V,AutoPFM/PWM Mode vs.ForcedPWM Figure4Mode, LogarithmicScale Load Current,VOUT = 1.8V,AutoPFM/PWM Mode Figure5 OutputVoltageAccuracy Load Current,VOUT = 1.8V,ForcedPWM Mode Figure6 Shutdown Current InputVoltageand AmbientTemperature Figure7 QuiescentCurrent InputVoltage Figure8 OscillatorFrequency InputVoltage Figure9 InputVoltage,Low-SideSwitch Figure10StaticDrain-SourceOn-State Resistance InputVoltage,High-SideSwitch Figure11 R DISCHARGE InputVoltagevs.VOUT Figure12 PWM Mode, VIN = 3.6V,VOUT = 1.8V,500 mA, L = 1.2μH, C OUT = 10μF Figure13 TypicalOperation PFM Mode, VIN = 3.6V,VOUT = 1.8V,20 mA, L = 1.2μH, C OUT = 10μF Figure14 PWM Mode, VIN = 3.6V,VOUT = 1.2V,0.2mA to1 A Figure15 Load Transient PFM Mode, VIN = 3.6V,VOUT = 1.2V,20 mA to250 mA Figure16 VIN = 3.6V,VOUT = 1.8V,200 mA to1500 mA Figure17 PWM Mode, VIN = 3.6V to4.2V,VOUT = 1.8V,500 mA Figure18 LineTransient PFM Mode, VIN = 3.6V to4.2V,VOUT = 1.8V,500 mA Figure19 StartupintoLoad VIN = 3.6V,VOUT = 1.8V,Load = 2.2-Ω Figure20 OutputDischarge VIN = 3.6V,VOUT = 1.8V,No Load Figure21 EFFICIENCY EFFICIENCY vs vs LOAD CURRENT LOAD CURRENT Figure1.VOUT = 1.2V,Auto PFM/PWM Mode, Figure2.VOUT = 1.8V,Auto PFM/PWM Mode, LinearScale LinearScale Copyright© 2010–2012,Texas InstrumentsIncorporated SubmitDocumentationFeedback 7 ProductFolderLink(s):TLV62065

Voltage□Positioning□PFM□Mode PWM□Mode 0.001 0.01 0.1 1 10 I -□Load□Current□- AL L =□1 H, C =□10 F, V =□1.8□V, Mode: Auto□PFM/PWM /c109 /c109OUT OUT V =□4.2□VIN V =□5□VIN V =□3.6□VIN V =□3.3□VIN 1.710 1.728 1.746 1.764 1.782 1.800 1.818 1.836 1.854 1.872 1.890 V -□Output□Voltage□DC□-□VO 1.710 1.728 1.746 1.764 1.782 1.800 1.818 1.836 1.854 1.872 1.890 V -□Output□Voltage□DC□-□VO 0.001 0.01 0.1 1 10 I -□Load□Current□- AL L =□1 H, C =□10 F, V =□1.8□V, Mode:□Forced□PWM /c109 /c109OUT OUT V =□4.2□VIN V =□5□VIN V =□3.6□VIN V =□3.3□VIN 100 Efficiency□-□% 0.001 0.01 0.1 1 10 I -□Load□Current□- AL L =□1.2 H□(NRG4026T□1R2), C =□10 F□(0603□size), V =□1.8□V /c109 /c109OUT OUT V =□3.3□VIN V =□3.6□V V =□4.2□V V =□5□V IN IN IN Auto□PFM/PWM□Mode V =□3.3□VIN V =□3.6□V V =□4.2□V V =□5□V IN IN IN Forced□PWM□Mode 100 Efficiency□-□% I -□Load□Current□- AL V =□4.2□VIN V =□5□VIN V =□3.7□VIN L =□1.2 H□(NRG4026T□1R2), C =□22 F□(0603□size), V =□3.3□V, Mode: Auto□PFM/PWM /c109 /c109OUT OUT TLV62065 SLVSAC4A –NOVEMBER 2010–REVISED JULY 2012 www.ti.com EFFICIENCY EFFICIENCY vs vs LOAD CURRENT LOAD CURRENT Figure3.VOUT = 3.3V,Auto PFM/PWM Mode, Figure4.Auto PFM/PWM Mode vs.Forced PWM Mode, LinearScale LogarithmicScale OUTPUT VOLTAGE ACCURACY OUTPUT VOLTAGE ACCURACY vs vs LOAD CURRENT LOAD CURRENT Figure5.Auto PFM/PWM Mode Figure6.Forced PWM Mode

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0.02 0.04 0.06 0.08 0.1 0.12 2.5 3 3.5 4 4.5 5 5.5 6 V -□Input□Voltage□-□VI T =□85°CJ T =□25°CJ T =□-40°CJ R - DSON /c87 2.8 2.85 2.9 2.95 3.05 3.1 T =□85°CA T =□25°CA T =□-40°CA 2.5 3 3.5 4 4.5 5 5.5 6 V -□Input□Voltage□-□VI f -□Oscillator□Frequency□-□MHzOSC 2.5 3 3.5 4 4.5 5 5.5 6 V -□Input□Voltage□-□VI T =□85°CA T =□25°CA T =□-40°CA I -□Quiesent□Current□- Aq /c109 2.5 3 3.5 4 4.5 5 5.5 6 V -□Input□Voltage□-□VI T =□85°CA T =□25°CA T =□-40°CA 0.25 0.50 0.75 I -□Shutdown□Current□- ASHDN /c109 TLV62065 www.ti.com SLVSAC4A –NOVEMBER 2010–REVISED JULY 2012 SHUTDOWN CURRENT QUIESCENT CURRENT vs vs INPUT VOLTAGE AND AMBIENT TEMPERATURE INPUT VOLTAGE Figure7. Figure8. OSCILLATOR FREQUENCY STATIC DRAIN-SOURCE ON-STATE RESISTANCE vs vs INPUT VOLTAGE INPUT VOLTAGE Figure9. Figure10.Low-Side Switch Copyright© 2010–2012,Texas InstrumentsIncorporated SubmitDocumentationFeedback 9 ProductFolderLink(s):TLV62065

Time□Base□-□4/c109s/Div I 200mA/DivCOIL SW□2V/Div V 50mV/DivOUT V =□3.6□V V =□1.8□V I =□20□mA IN OUT OUT MODE□=□GND L =□1.2 H C =□10 F /c109 /c109OUT Time□Base□-□100ns/Div I 500mA/DivCOIL SW□2V/Div V 50mV/DivOUT V =□3.6□V V =□1.8□V I =□500□mA IN OUT OUT MODE□=□GND L =□1.2 H C =□10 F /c109 /c109OUT 100 200 300 400 500 600 R - Discharge /c87 2.5 3 3.5 4 4.5 5 5.5 6 V -□Input□Voltage□-□VI V =□3.3□VO V =□1.8□VO V =□1.2□VO 0.02 0.04 0.06 0.08 0.1 0.12 0.14 0.16 0.18 0.2 2.5 3 3.5 4 4.5 5 5.5 6 V -□Input□Voltage□-□VI T =□85°CJ T =□-40°CJ T =□25°CJ R - DSON /c87 TLV62065 SLVSAC4A –NOVEMBER 2010–REVISED JULY 2012 www.ti.com STATIC DRAIN-SOURCE ON-STATE RESISTANCE R DISCHARGE vs vs INPUT VOLTAGE INPUT VOLTAGE Figure11.High-SideSwitch Figure12. Figure13.TypicalOperation(PWM Mode) Figure14.TypicalOperation(PFM Mode)

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Time□Base□-□100/c109s/Div 200□mV/Div V =□3.6□V, V =□1.8□V, L =□1.2 H C =□10 I 200□mA to□1500□mA IN OUT OUT OUT /c109 /c109F1A/Div 2A/Div Time Base - 100 /c109s/Div 500 mV/Div V V I L = IN OUT OUT = 3.6 V to 4.2 V, = 1.8 V, = 500 mA

1.2 H,/c109

Time□Base□-□10 µs/Div I 500□mA/DivLOAD I 1A/DivCOIL SW□2V/Div V 100□mV/DivOUT V =□3.6□V, V =□1.2□V, I =□20□mA to□250□mA IN OUT OUT Time□Base□-□10 µs/Div I 500□mA/DivLOAD I 1A/DivCOIL SW□2V/Div V 100□mV/DivOUT V =□3.6□V, V =□1.2□V, I =□0.2 A to□1 A MODE□=□V IN OUT OUT IN TLV62065 www.ti.com SLVSAC4A –NOVEMBER 2010–REVISED JULY 2012 Figure15.Load TransientResponse Figure16.Load Transient PWM Mode 0.2A To 1A PFM Mode 20 mA to250mA Figure17.Load TransientResponse Figure18.LineTransientResponse PWM Mode 200 mA To 1500 mA Copyright© 2010–2012,Texas InstrumentsIncorporated SubmitDocumentationFeedback 11 ProductFolderLink(s):TLV62065

Time□Base□-□2ms/Div SW 2□V/Div 1□V/Div VOUT EN 1□V/Div V =□3.6□V, V =□1.8□V, C =□10 F, No□Load IN OUT OUT /c109 Time□Base□-□100 /c109s/Div 2□V/Div 500□mA/Div

2 A/Div

1□V/Div 500□mA/Div V =□3.6□V, V =□1.8□V, Load□=□2R2 IN OUT L =□1.2 H, C =□10 F /c109 /c109OUT Time□Base□-□100 /c109s/Div 500□mV/Div V =□1.8□V, I =□50□mA, L =□1.2 H, C =□10 IN OUT OUT OUT /c109 /c109F 50□mV/Div TLV62065 SLVSAC4A –NOVEMBER 2010–REVISED JULY 2012 www.ti.com Figure19.LineTransientPFM Mode Figure20.StartupIntoLoad – VOUT 1.8V Figure21.Output Discharge

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www.ti.com SLVSAC4A –NOVEMBER 2010–REVISED JULY 2012 DETAILED DESCRIPTION OPERATION The TLV62065 stepdown converteroperateswithtypically3MHz fixedfrequencypulsewidthmodulation(PWM) at moderate to heavy loadcurrents.At lightloadcurrentsthe convertercan automaticallyenterPower Save Mode and operatestheninPFM (PulseFrequencyMode) mode. DuringPWM operationthe converteruse a uniquefastresponsevoltagemode controllerscheme withinput voltagefeed-forwardtoachievegood lineand loadregulationallowingtheuse ofsmallceramicinputand output capacitors.At thebeginningofeach clockcycleinitiatedby theclocksignal,theHigh Side MOSFET switchis turnedon.The currentflowsnow fromtheinputcapacitorviatheHigh SideMOSFET switchthroughtheinductor totheoutputcapacitorand load.Duringthisphase,thecurrentramps up untilthePWM comparatortripsand the controllogicwillturnofftheswitch.The currentlimitcomparatorwillalsoturnofftheswitchincase thecurrent limitoftheHigh SideMOSFET switchisexceeded.Aftera dead timepreventingshootthroughcurrent,theLow Side MOSFET rectifieristurnedon and the inductorcurrentramps down. The currentflowsnow from the inductortotheoutputcapacitorand totheload.Itreturnsback totheinductorthroughtheLow Side MOSFET rectifier. The nextcyclewillbe initiatedby theclocksignalagainturningofftheLow SideMOSFET rectifierand turningon theHighSideMOSFET switch. POWER SAVE MODE At TLV62065 pullingtheMode pinlow enablesPower Save Mode. Iftheloadcurrentdecreases,theconverter entersPower Save Mode operationautomatically.DuringPower Save Mode theconverterskipsswitchingand operateswithreducedfrequencyinPFM mode witha minimum quiescentcurrenttomaintainhighefficiency.The converterpositionstheoutputvoltagetypically+1% above thenominaloutputvoltage.Thisvoltagepositioning featureminimizesvoltagedropscaused by a sudden loadstep. The transitionfromPWM mode toPFM mode occursonce theinductorcurrentintheLow SideMOSFET switch becomes zero,whichindicatesdiscontinuousconductionmode. DuringthePower Save Mode theoutputvoltageismonitoredwitha PFM comparator.As theoutputvoltagefalls below thePFM comparatorthresholdofVOUTnominal +1%, thedevicestartsa PFM currentpulse.For thistheHigh SideMOSFET switchwillturnon and theinductorcurrentramps up.AftertheOn-timeexpirestheswitchwillbe turnedoffand theLow SideMOSFET switchwillbe turnedon untiltheinductorcurrentbecomes zero. The convertereffectivelydeliversa currenttotheoutputcapacitorand theload.Iftheloadisbelow thedelivered currenttheoutputvoltagewillrise.Iftheoutputvoltageisequalor higherthanthePFM comparatorthreshold, thedevicestopsswitchingand entersa sleepmode withtyp.18µA currentconsumption. In case the outputvoltageisstillbelow the PFM comparatorthreshold,furtherPFM currentpulseswillbe generateduntilthePFM comparatorthresholdisreached.The converterstartsswitchingagainonce theoutput voltagedropsbelowthePFM comparatorthresholddue totheloadcurrent. The PFM mode isexitedand PWM mode enteredincase theoutputcurrentcan no longerbe supportedinPFM mode. Copyright© 2010–2012,Texas InstrumentsIncorporated SubmitDocumentationFeedback 13 ProductFolderLink(s):TLV62065

Output□voltage Vout (PWM) Vout +1% PFM□Comparator threshold Voltage□Positioning Light□load PFM□Mode moderate□to□heavy□load PWM□Mode TLV62065 SLVSAC4A –NOVEMBER 2010–REVISED JULY 2012 www.ti.com Figure22. Power Save Mode OperationwithautomaticMode transition 100% Duty Cycle Low Dropout Operation The devicestartstoenter100% dutycyclemode as theinputvoltagecomes closetothenominaloutputvoltage. Inordertomaintaintheoutputvoltage,theHigh-SideMOSFET switchisturnedon 100% forone ormore cycles. With furtherdecreasingVIN theHigh-SideMOSFET switchisturnedon completely.Inthiscase theconverter offersa low input-to-outputvoltagedifference.This is particularlyusefulin battery-poweredapplicationsto achievelongestoperationtimeby takingfulladvantageofthewholebatteryvoltagerange. The minimum inputvoltagetomaintainregulationdepends on theloadcurrentand outputvoltage,and can be calculatedas: VINmin = VO max + IO max × (RDS(on)max + R L) With: IO max = maximum outputcurrent R DS(on)max = maximum P-channelswitchR DS(on). R L = DC resistanceoftheinductor VO max = nominaloutputvoltageplusmaximum outputvoltagetolerance UndervoltageLockout The under voltagelockoutcircuitpreventsthe devicefrom malfunctioningat low inputvoltagesand from excessivedischargeof the battery.Itdisablesthe outputstageof the converteronce the fallingVIN tripsthe under-voltagelockoutthresholdVUVLO . The under-voltagelockoutthresholdVUVLO forfallingVIN is typically 1.78V.The devicestartsoperationonce the risingVIN tripsunder-voltagelockoutthresholdVUVLO again at typically1.95V. Output CapacitorDischarge With EN = GND, the deviceentersshutdown mode and allinternalcircuitsare disabled.The SW pin is connectedtoPGND viaan internalresistortodischargetheoutputcapacitor.Thisfeatureensuresa startupina dischargedoutputcapacitoronce the converterisenabledagainand prevents"floating"charge on the output capacitor.The outputvoltageramps up monotonicstartingfrom0V. MODE SELECTION The MODE pinallowsmode selectionbetween forcedPWM mode and Power Save Mode.

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www.ti.com SLVSAC4A –NOVEMBER 2010–REVISED JULY 2012 ConnectingthispintoGND enablesthePower Save Mode withautomatictransitionbetween PWM and PFM mode. PullingtheMODE pinhighforcestheconvertertooperateinfixedfrequencyPWM mode even atlight loadcurrents.Thisallowssimplefilteringoftheswitchingfrequencyfornoisesensitiveapplications.Inthismode, theefficiencyislowercompared tothepower save mode duringlightloads. The conditionof the MODE pincan be changed duringoperationand allowsefficientpower management by adjustingtheoperationmode oftheconvertertothespecificsystemrequirements. ENABLE The deviceisenabledby settingEN pinto high.At first,the internalreferenceisactivatedand the internal analogcircuitsaresettled.Afterwards,thesoftstartisactivatedand theoutputvoltageisramped up.The output voltagesreaches95% ofitsnominalvaluewithintSTART oftypically500 µs afterthedevicehas been enabled.The EN inputcan be used tocontrolpower sequencingina system withvariousDC/DC converters.The EN pincan be connectedtotheoutputofanotherconverter,todrivetheEN pinhighand gettinga sequencingofsupply rails.WithEN = GND, thedeviceentersshutdown mode. Inthismode, allcircuitsaredisabledand theSW pinis connectedtoPGND viaan internalresistortodischargetheoutput. SOFT START The TLV62065 has an internalsoftstartcircuitthatcontrolsthe ramp up of the outputvoltage.Once the converterisenabledand theinputvoltageisabove theundervoltagelockoutthresholdVUVLO theoutputvoltage ramps up from5% to95% ofitsnominalvaluewithintRamp oftyp.250µs. Thislimitstheinrushcurrentintheconverterduringstartup and preventspossibleinputvoltagedropswhen a batteryorhighimpedance power sourceisused. Duringsoftstart,the switchcurrentlimitisreduced to 1/3 of itsnominalvalueILIMF untilthe outputvoltage reaches 1/3 of itsnominalvalue.Once the outputvoltagetripsthisthreshold,the deviceoperateswithits nominalcurrentlimitILIMF. INTERNAL CURRENT LIMIT/FOLD-BACK CURRENT LIMITFOR SHORT-CIRCUIT PROTECTION DuringnormaloperationtheHigh-Sideand Low-SideMOSFET switchesareprotectedby itscurrentlimitsILIMF. Once theHigh-SideMOSFET switchreachesitscurrentlimit,itisturnedoffand theLow-SideMOSFET switchis turnedon.The High-SideMOSFET switchcan onlyturnon again,once thecurrentintheLow -SideMOSFET switchdecreasesbelow itscurrentlimitILIMF.The deviceiscapabletoprovidepeak inductorcurrentsup toits internalcurrentlimitILIMF.. As soon as theswitchcurrentlimitsarehitand theoutputvoltagefallsbelow 1/3ofthenominaloutputvoltage due tooverloadorshortcircuitcondition,thefoldbackcurrentlimitisenabled.Inthiscase theswitchcurrentlimit isreducedto1/3ofthenominalvalueILIMF. Due to the short-circuitprotectionisenabledduringstart-up,the devicedoes not delivermore than 1/3 of its nominalcurrentlimitILIMF untiltheoutputvoltageexceeds 1/3ofthenominaloutputvoltage.Thisneeds tobe consideredwhen a loadisconnectedtotheoutputoftheconverter,whichactsas a currentsink. THERMAL SHUTDOWN As soon as thejunctiontemperature,TJ,exceeds 150°C (typical)thedevicegoes intothermalshutdown.Inthis mode, theHigh-Sideand Low-SideMOSFETs areturnedoff.The devicecontinuesitsoperationwitha softstart once thejunctiontemperaturefallsbelowthethermalshutdownhysteresis. Copyright© 2010–2012,Texas InstrumentsIncorporated SubmitDocumentationFeedback 15 ProductFolderLink(s):TLV62065

/c112 /c180 /c180 /c180ff 1C =

2 R 25 kHz

f /c112 /c180 /c180 /c180z 1 ff 1= = 25 kH z

2 R C

V OUT /C0043V REF /C0032/C04661 /C0041 R 1 R 2 /C0467 TLV62065 V = 1.8 V up to 2 A OUT R 360 k Ω R 180 k Ω V = 2.9 V to 5.5 VIN C OUT µF C IN µF PVIN AVIN EN MODE AGND PGND SW FB C 22 pF ff L

1.0 H/c109

SLVSAC4A –NOVEMBER 2010–REVISED JULY 2012 www.ti.com

APPLICATION INFORMATION

Figure23. TLV62065 1.8VAdjustableOutput VoltageConfiguration OUTPUT VOLTAGE SETTING The outputvoltagecan be calculatedto: withan internalreferencevoltageVREF typically0.6V. To minimizethecurrentthroughthefeedbackdividernetwork,R 2 shouldbe withintherange of120 kΩ to360 kΩ.The sum ofR 1 and R 2 shouldnotexceed ~1M Ω,tokeep thenetworkrobustagainstnoise.An externalfeed- forwardcapacitorC ffisrequiredforoptimum regulationperformance.Lower resistorvaluescan be used.R 1 and C ffplacesa zerointheloop.The rightvalueforC ffcan be calculatedas:

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ILmax /C0043Ioutmax /C0041 /C0068IL /C0068IL /C0043Vout/C0032 1 /C0042Vout Vin L /C0032ƒ c 1= = 50kHz 2 (1μH 10μF) f /c112 /c180 /c180 /c180 TLV62065 www.ti.com SLVSAC4A –NOVEMBER 2010–REVISED JULY 2012 OUTPUT FILTER DESIGN (INDUCTOR AND OUTPUT CAPACITOR) The internalcompensationnetworkofTLV62065 isoptimizedfora LC outputfilterwitha cornerfrequencyof: The partoperateswithnominalinductorsof1.0µH to1.2µH and with10µF to22µF smallX5R and X7R ceramic capacitors.Pleaserefertothelistsofinductorsand capacitors.The partisoptimizedfora 1.0µH inductorand 10µF outputcapacitor. InductorSelection The inductorvaluehas a directeffecton the ripplecurrent.The selectedinductorhas to be ratedforitsdc resistanceand saturationcurrent.The inductorripplecurrent(ΔIL) decreases with higherinductanceand increaseswithhigherVI orVO . Equation1 calculatesthemaximum inductorcurrentinPWM mode under staticloadconditions.The saturation currentoftheinductorshouldbe ratedhigherthanthemaximum inductorcurrentas calculatedwithEquation2. Thisisrecommended because duringheavy loadtransienttheinductorcurrentrisesabove thecalculatedvalue. (1) (2) With: f= SwitchingFrequency(3MHz typical) L = InductorValue ΔIL = Peak-to-Peakinductorripplecurrent ILmax = Maximum Inductorcurrent A more conservativeapproachistoselecttheinductorcurrentratingjustfortheswitchcurrentlimitILIMFofthe converter. The totallossesofthecoilhave a strongimpacton theefficiencyoftheDC/DC conversionand consistofboth thelossesinthedc resistanceR (DC) and thefollowingfrequency-dependentcomponents:

• The lossesinthecorematerial(magnetichysteresisloss,especiallyathighswitchingfrequencies)
• Additionallossesintheconductorfromtheskineffect(currentdisplacementathighfrequencies)
• Magneticfieldlossesoftheneighboringwindings(proximityeffect)
• Radiationlosses Table2.ListofInductors DIMENSIONS [mm 3] INDUCTANCE μH INDUCTOR TYPE SUPPLIER 3.2x 2.5x 1.0max 1.0 LQM32PN (MLCC) Murata 3.7x 4 x 1.8max 1.0 LQH44 (wirewound) Murata 4.0x 4.0x 2.6max 1.2 NRG4026T (wirewound) TaiyoYuden 3.5x 3.7x 1.8max 1.2 DE3518 (wirewound) TOKO Output CapacitorSelection The advanced fast-responsevoltagemode controlscheme of the TLV62065 allowsthe use of tinyceramic capacitors.Ceramic capacitorswith low ESR values have the lowest output voltagerippleand are recommended. The outputcapacitorrequireseitheran X7R orX5R dielectric.Y5V and Z5U dielectriccapacitors, asidefrom theirwide variationincapacitanceovertemperature,become resistiveathighfrequenciesand may notbe used.Formost applicationsa nominal10µF or22µF capacitorissuitable.Atsmallceramiccapacitors,the DC-biaseffectdecreasestheeffectivecapacitance.Thereforea 22µF capacitorcan be used foroutputvoltages higherthan2V,see listofcapacitors. Copyright© 2010–2012,Texas InstrumentsIncorporated SubmitDocumentationFeedback 17 ProductFolderLink(s):TLV62065

L /C0032ƒ /C00321 2 /C00323/C0504 TLV62065 SLVSAC4A –NOVEMBER 2010–REVISED JULY 2012 www.ti.com Incase additionalceramiccapacitorsinthesuppliedsystemareconnectedtotheoutputoftheDC/DC converter, theoutputcapacitorC OUT need tobe decreasedinordernottoexceed therecommended effectivecapacitance range.Inthiscase a loopstabilityanalysismust be performedas describedlater. Atnominalloadcurrent,thedeviceoperatesinPWM mode and theRMS ripplecurrentiscalculatedas: (3) InputCapacitorSelection Because of the natureof the buck converterhavinga pulsatinginputcurrent,a low ESR inputcapacitoris requiredforbestinputvoltagefilteringand minimizingtheinterferencewithothercircuitscaused by highinput voltagespikes.For most applicationsa 10µF ceramiccapacitorisrecommended. The inputcapacitorcan be increasedwithoutany limitforbetterinputvoltagefiltering. Take carewhen usingonlysmallceramicinputcapacitors.When a ceramiccapacitorisused attheinputand the power isbeingsuppliedthroughlongwires,such as froma walladapter,a loadstepattheoutputorVIN stepon the inputcan induceringingat the VIN pin.This ringingcan coupleto the outputand be mistakenas loop instabilityorcouldeven damage thepartby exceedingthemaximum ratings. Table3.ListofCapacitors CAPACITANCE TYPE SIZE [mm 3] SUPPLIER 10μF GRM188R60J106M 0603:1.6x 0.8x 0.8 Murata 22μF GRM188R60G226M 0603:1.6x 0.8x 0.8 Murata 22µF CL10A226MQ8NRNC 0603:1.6x 0.8x 0.8 Samsung 10µF CL10A106MQ8NRNC 0603:1.6x 0.8x 0.8 Samsung CHECKING LOOP STABILITY The firststepofcircuitand stabilityevaluationistolookfroma steady-stateperspectiveatthefollowingsignal

• Switchingnode,SW
• Inductorcurrent,IL
• Outputripplevoltage,VOUT(AC) These are the basicsignalsthatneed to be measured when evaluatinga switchingconverter.When the switchingwaveform shows largedutycyclejitterortheoutputvoltageorinductorcurrentshows oscillations,the regulationloop may be unstable.This is oftena resultof board layoutand/or wrong L-C outputfilter combinations.As a nextstepintheevaluationoftheregulationloop,theloadtransientresponseistested.The time between the applicationof the load transientand the turnon of the P-channelMOSFET, the output capacitormust supplyallof the currentrequiredby the load.VOUT immediatelyshiftsby an amount equalto ΔI(LOAD) x ESR, where ESR istheeffectiveseriesresistanceofC OUT .ΔI(LOAD) beginstochargeordischargeC O generatinga feedbackerrorsignalused by theregulatortoreturnVOUT toitssteady-statevalue.The resultsare most easilyinterpretedwhen thedeviceoperatesinPWM mode atmedium tohighloadcurrents. Duringthisrecoverytime,VOUT can be monitoredforsettlingtime,overshoot,or ringing;thathelpsevaluate stabilityoftheconverter.Withoutany ringing,theloophas usuallymore than45° ofphase margin.

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L CIN COUT R1R2 CFF GND EnableMode TLV62065 www.ti.com SLVSAC4A –NOVEMBER 2010–REVISED JULY 2012 LAYOUT CONSIDERATIONS Figure24. PCB Layout As forallswitchingpower supplies,thelayoutisan importantstepinthedesign.Properfunctionofthedevice demands carefulattentiontoPCB layout.Care must be takeninboardlayouttogetthespecifiedperformance.If thelayoutisnotcarefullydone,theregulatorcouldshow poorlineand/orloadregulation,stabilityissuesas well as EMI and thermalproblems.Itiscriticaltoprovidea low inductance,impedance ground path.Therefore,use wide and shorttracesforthemain currentpaths.The inputcapacitorshouldbe placedas closeas possibleto theIC pinsas wellas theinductorand outputcapacitor. ConnecttheAGND and PGND PinsofthedevicetothePowerPAD ™ landofthePCB and use thispad as a star point.Use a common Power PGND node and a differentnode fortheSignalAGND tominimizetheeffectsof groundnoise.The FB dividernetworkshouldbe connectedrighttotheoutputcapacitorand theFB linemust be routedaway fromnoisycomponents and traces(e.g.,SW line). Due tothesmallpackage ofthisconverterand theoverallsmallsolutionsize,thethermalperformanceofthe PCB layoutisimportant.For good thermalperformancea fourormore LayerPCB designisrecommended. The PowerPAD oftheIC must be solderedon thepower pad areaon thePCB toachieveproperthermalconnection. Additionally,forgood thermalperformance,thePowerPAD on thePCB needs tobe connectedtoan innerGND planewithsufficientviaconnections.See thedocumentationoftheevaluationkit. Copyright© 2010–2012,Texas InstrumentsIncorporated SubmitDocumentationFeedback 19 ProductFolderLink(s):TLV62065

www.ti.com 11-Apr-2013 Addendum-Page 1 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Qty Eco Plan (2) Lead/Ball Finish MSL Peak Temp (3) Op Temp (°C) Top-Side Markings (4) Samples TLV62065DSGR ACTIVE WSON DSG 8 3000 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR -40 to 85 QVB TLV62065DSGT ACTIVE WSON DSG 8 250 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR -40 to 85 QVB (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) Multiple Top-Side Markings will be inside parentheses. Only one Top-Side 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 Top-Side 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. OTHER QUALIFIED VERSIONS OF TLV62065 :

www.ti.com 11-Apr-2013 Addendum-Page 2

• Automotive: TLV62065-Q1 NOTE: Qualified Version Definitions:
• Automotive - Q100 devices qualified for high-reliability automotive applications targeting zero defects

*All dimensions are nominal Device Package Type Package Drawing Pins SPQ Reel Diameter (mm) Reel Width W1 (mm) (mm) (mm) (mm) (mm) W (mm) Pin1 Quadrant PACKAGE MATERIALS INFORMATION www.ti.com 20-Jun-2013 Pack Materials-Page 1

*All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) TLV62065DSGR WSON DSG 8 3000 367.0 367.0 35.0 TLV62065DSGT WSON DSG 8 250 210.0 185.0 35.0 PACKAGE MATERIALS INFORMATION www.ti.com 20-Jun-2013 Pack Materials-Page 2

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