Very Low Input, Very Low Dropout, 2-Amp …

1 INENNCCINCOUTI nput VoltageOutput VoltageTPS7A7001 NCOUTFBNCGNDE nableV= + R1R2R2R1 ProductFolderOrderNowTechnicalDocumentsT ools &SoftwareSupport &CommunityAn IMPORTANTNOTICEat the end of this datasheetaddressesavailability,warranty, changes,use in safety-criticalapplications,intellectual propertymattersand JANUARY2012 REVISEDAPRIL2017 tps7a7001 Very Low Input, Very Low Dropout, 2-AmpRegulatorWith Enable11 Features1 InputVoltageas Low as 380 mV DropoutMaximumat 2 A V Protections:CurrentLimitand ThermalShutdown EnablePin 1- A QuiescentCurrentin ShutdownMode Full IndustrialTemperatureRange Availablein SO-8,FullyRoHS-CompliantPackage2 Applications Telecomand NetworkingCards Motherboardsand PeripheralCards Industrial WirelessInfrastructure Set-TopBoxes MedicalEquipment NotebookComputers Battery-PoweredSystems3 DescriptionTheTPS7A7001is a high-performance,positive-voltage,low-dr opout(LDO)regulatordesignedforapplicatio nsrequiringverylow inputvoltageand verylow dropoutvoltageat up to 2 A.

2 The deviceoperateswitha singleinputvoltageas low as , andwith an outputvoltageprogrammableto as low as Theoutputvoltagecan be set withan TPS7A7001featuresultra-lowdropout,idealf orapplicationswhereVOUTis verycloseto ,the TPS7A7001has an enablepin forfurtherreducedpowerdissipationwhilein TPS7A7001providesexcellentregulationover variationsin line, load,and availablein an 8-pinSOPowerPAD (1)PARTNUMBERPACKAGEBODYSIZE(NOM)TPS7A70 01SO PowerPAD(8) (1) For all availablepackages,see the packageoptionaddendumat the end of the JANUARY2012 2012 2017,TexasInstrumentsIncorporatedTableof Contents1 Pin Configurationand Applicationand Deviceand Mechanical,Packaging,and RevisionHistoryNOTE:Pagenumbersfor previousrevisionsmay differfrompagenumbersin the (August2015)to RevisionFPage Changed"operatingfree-air" to "junction" ChangedOUTpin max voltagefrom7 to VIN+ V or 7 V, whicheveris smaller,inAbsoluteMaximumRatingstable(mo vedOUTfromfirst row to secondrow).

3 5 DeletedTA, ambienttemperaturerange, ChangedCOUTmax valuefrom47 F to 200 F Addednote(2) toRecommendedOperatingConditionstablereg ardingCOUTmax Deletedredundantnotes2 to 7 in theThermalInformationtable;all informationfromdeletednotesavailableinap plicationreportshownin note(1) ..5 Changednote(1) inElectricalCharacteristics; deletedinitialreferenceto R1and ChangedOutputCapacitor(OUT)section;rewor dedfor (September2013)to RevisionEPage AddedESDR atingstable,FeatureDescriptionsection,De viceFunctionalModes,ApplicationandImplem entationsection,PowerSupplyRecommendatio nssection,Layoutsection,DeviceandDocumen tationSupportsection,andMechanical,Packa ging, (January2013)to RevisionDPage Addednew text (July2012)to RevisionCPage Deletedmaximumvaluefor JANUARY2012 REVISEDAPRIL2017 SubmitDocumentationFeedbackCopyright 2012 2017,TexasInstrumentsIncorporatedChanges fromRevisionA (June2012)to RevisionBPage ChangedOutputVoltage,ILIM parametertest (January2012)to RevisionAPage Changedoutputvoltageminimumvaluein first Changedtest Changednote(1) Addednew note(4)

4 JANUARY2012 2012 2017,TexasInstrumentsIncorporated5 Pin Configurationand FunctionsDDAP ackage8-PinSO PowerPADTop ViewPin pin V turnsthe regulatoroff. Connectto VINif not pin is the the Table2 GroundpinIN3 IUnregulatedsupplyvoltagepin. It is recommendedto connectan inputcapacitorto this , 4, 5 Not NC pins are not connectedto any isrecommendedto connectthe NC pins to A F or largercapacitorof any type is requiredfor stronglyrecommendsconnectingthe thermalpad to a anelectricallyfloating,dedicatedthermalp laneis available,the thermalpad can also beconnectedto JANUARY2012 REVISEDAPRIL2017 SubmitDocumentationFeedbackCopyright 2012 2017,TexasInstrumentsIncorporated(1)Stre ssesbeyondthoselistedunderAbsoluteMaximu mRatingsmay causepermanentdamageto the stressratingsonly,and functionaloperationof the deviceat theseor any otherconditionsbeyondthoseindicatedis not absolute-maximum-ratedconditionsfor extendedperiodsmay affectdevicereliability.

5 (2)The absolutemaximumratingis VIN+ V or V, whicheveris (unlessotherwisenoted)(1)MINMAXUNITV oltageIN , FB, OUT + (2)CurrentOUTI nternallylimitedATemperatureOperatingvir tualjunction,TJ 55150 CStorage,Tstg 55150(1)JEDEC documentJEP155statesthat 500-VHBM allowssafe manufacturingwith a standardESDcontrolprocess.(2)JEDEC documentJEP157statesthat 250-VCDM allowssafe manufacturingwith a (ESD)ElectrostaticdischargeHuman-bodymod el(HBM),per ANSI/ESDA/JEDECJS-001(1) 2000 VCharged-devicemodel(CDM),per JEDEC specificationJESD22-C101(2) 500(1)See Figure1 and Figure2 for additionaloutputcapacitorESRrequirements .(2)For outputcapacitorslargerthan47 F, a feedforwardcapacitorof at least220 pF mustbe voltage0 VINVCINI nputcapacitor110 FCOUTO utputcapacitor(1)(2) FCFBF eedforwardcapacitance0100nFIOUTO utputcurrent02 ATJJ unctiontemperature 40125 C(1)For moreinformationabouttraditionaland new thermalmetrics,see (1) tps7a7001 UNITDDA(SO PowerPAD)8 PINSR C/WR JC(top)Junction-to-case(top) C/WR C/W C/W C/WR JC(bot)Junction-to-case(bottom) C/W6 tps7a7001 SBVS134F JANUARY2012 2012 2017,TexasInstrumentsIncorporated(1)When settingVOUTto a V, connectR2to the FB pin using27-k R2 33-k FunctionalBlockDiagramfor detailsof R1and R2.

6 (2)Accuracydoesnot includeerroron feedbackresistorsR1and R2.(3)TPS7A7001is not testedat VOUT= V, V VIN V, and 500 mA IOUT 2 A becausethe powerdissipationis higherthanthe maximumratingof the ,this accuracyspecificationdoesnot applyto any applicationconditionthat exceedsthe powerdissipationlimit of the package.(4)VIN= VOUT+ V or , whicheveris greater.(5)VDO= VIN VOUT with VFB= full operatingtemperaturerange(seeRecommended OperatingConditions), VEN= V, VFB= VOUT(1), VIN V, 10 A IOUT 2 A, COUT= 10 F (unlessotherwisenoted).Typicalvaluesare at TJ= 25 current(small)VIN= V,50- load resistorbetweenOUTand GND3mAGNDpin current(shutdown)VIN= V, VEN= 0 V5 AOUTPUTVOLTAGEVOUTO utputvoltageaccuracy(2)(3)VIN= VOUT+ V(4), IOUT= 10 mA 2%2%VIN= V, IOUT= A, 0 C TJ= TA +85 C 2%2%IOUT= 10 mA 3%3% VO( VI)Line regulationIOUT= 10 VO( IO)Loadregulation(3)10 mA IOUT 2 (5)IOUT= A, V VOUT V200mVIOUT= A, V VOUT V300 IOUT= A, V VOUT V380 ILIMO utputcurrentlimitVIN= , VOUT= VOUT(NOM) V, VFB= VOUT, IOUT= 10 pin currentVFB= V1 AENABLEIENEN pin currentVEN= 0 V, VIN= AVILENEN pin inputlow (disable)VIN= pin inputhigh (enable)VIN= ,temperatureincreasing160 CReset,temperaturedecreasing140 Current (A)Dropout Voltage (mV) 40 C25 C125 CG005 Current (A)

7 Dropout Voltage (mV) 40 C25 C125 CG003 Current (A)Dropout Voltage (mV) 40 C25 C125 CG004 of InstabilityRegion of InstabilityOutput Current (A)ESR of Output Capacitor ( )WStable of InstabilityRegion of InstabilityOutput Current (A)ESR of Output Capacitor ( )WStable JANUARY2012 REVISEDAPRIL2017 SubmitDocumentationFeedbackCopyright 2012 2017, all fixedvoltageversionsand an adjustableversionat TJ= 25 C, VEN= VIN, CIN= 10 F, COUT= 10 F, and usingthecomponentvaluesin Table2 (unlessotherwisenoted)COUT= 10 FFigure1. StabilityCurveCOUT= 100 FFigure2. StabilityCurveVOUT= VFigure3. DropoutVoltagevs OutputCurrentVOUT= VFigure4. DropoutVoltagevs OutputCurrentVOUT= VFigure5. DropoutVoltagevs OutputCurrentV= x ()OUT1 + ReferenceR1R2FB8 tps7a7001 SBVS134F JANUARY2012 2012 2017,TexasInstrumentsIncorporated7 TPS7A7001offersa highcurrentsupplywithverylow TPS7A7001is designedtominimizethe requiredcomponentcountfor a simple,small-size,and (EN)The enablepin (EN)is an is logiclow, the deviceturnsoff and its consumptioncurrentis less than1 A.

8 Whenit is logichigh,the deviceturnson. The EN pin is requiredto be connectedto alogichigh or logiclow enablefunctionis not required,connectEN to TPS7A7001internalcurrentlimit helpsprotectthe ,theoutputsourcesa fixedamountof currentthat is largelyindependentof reliableoperation,thedeviceshouldnot be operatedin a currentlimit statefor extendedperiodsof the devicewith the enablepin, or increasingthe inputvoltageabovethe minimumoperatingvoltagewhilea low-impedanceshortexistson the outputof the device,mayresultin a sequenceof high-currentpulsesfromthe inputto the outputof the energyconsumedby the deviceis minimalduringtheseevents;therefore,there is no failurerisk. Additionalinputcapacitancehelpsto mitigatethe loadtransientrequirementofthe JANUARY2012 REVISEDAPRIL2017 SubmitDocumentationFeedbackCopyright 2012 2017, providesa quickcomparisonbetweenthe normal, Dropout, and disabledmodesof DeviceFunctionalModeComparisonOPERATINGM ODEPARAMETERVINENIOUTTJN ormalVIN> VOUT(nom)+ VDOVEN> VEN(HI)IOUT< ICLTJ< TSDD ropoutVIN< VOUT(nom)+ VDOVEN> VEN(HI)IOUT< ICLTJ< TSDD isabled VEN< VEN(LO) TJ> deviceregulatesto the nominaloutputvoltageunderthe followingconditions: The inputvoltageis greaterthanthe nominaloutputvoltageplus the dropoutvoltage(VOUT(nom)+ VDO).

9 The enablevoltagehas previouslyexceededthe enablerisingthresholdvoltageand not yet decreasedbelowthe enablefallingthreshold. The outputcurrentis less thanthe currentlimit (IOUT< ICL). The devicejunctiontemperatureis less thanthe thermalshutdowntemperature(TJ< TSD). the inputvoltageis lowerthanthe nominaloutputvoltageplusthe specifieddropoutvoltage,but all otherconditionsare met for normaloperation,the deviceoperatesin this mode,the outputvoltagetracksthe mode,the transientperformanceof the devicebecomessignificantlydegradedbecaus ethe passdeviceis in a triodestateand no longercontrolsthe currentthroughthe load transientsin dropoutcan resultin 1R = + 10 tps7a7001 SBVS134F JANUARY2012 2012 2017,TexasInstrumentsIncorporated8 Applicationand ImplementationNOTEI nformationin the followingapplicationssectionsis not partof the TI componentspecification,and TI doesnot warrantits accuracyor s customersareresponsiblefor determiningsuitabilityof componentsfor test theirdesignimplementationto (IN)

10 Althoughan inputcapacitoris not requiredfor stability,it is recommendedto connecta 1- F to 10- F lowequivalentseriesresistance(ESR)capaci toracrossIN and GNDnearthe (OUT)The TPS7A7001is stablewith standardceramiccapacitorswith F to 47 F withouta outputcapacitorsfrom47 F to 200 F, a feedforwardcapacitorof at least220 pFmustbe TPS7A7001is evaluatedusingan X5R-type,10- F X7R-typecapacitorsare recommendedbecauseof minimalvariationin valueand less than1 .As with any regulator,increasingthe size of the outputcapacitorreducesovershootand undershootmagnitude,but increasesdurationof the (FB)The voltageon the FB pin sets the outputvoltageand is determinedby the valuesof R1and R2. The valuesofR1and R2can be calculatedfor any voltageusingthe formulagivenin Equation1:(1)Table2 showsthe recommendedresistorvaluesfor the bestperformanceof the the valuesinTable2 are not used,keepthe valueof R2 between27 k and 33 k.