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AP7331300mA,LOWQUIESCENTCURRENT,FASTTRANSIENTLOWDROPOUTLINEARREGULATORAP7331Documentnumber:DS31914Rev.
3-21of13www.
diodes.
comJanuary2011DiodesIncorporatedDescriptionTheAP7331isa300mA,adjustableandfixedoutputvoltage,lowdropoutlinearregulator.
Thedeviceincludedpasselement,erroramplifier,band-gap,currentlimitandthermalshutdowncircuitry.
ThedeviceisturnedonwhenENpinissettologichighlevel.
Thecharacteristicsoflowdropoutvoltageandlowquiescentcurrentmakeitsuitableforlowpowerapplications,forexample,batterypowereddevices.
Thetypicalquiescentcurrentisapproximately65μA.
Built-incurrent-limitandthermal-shutdownfunctionspreventICfromdamageinfaultconditions.
TheAP7331isavailableinSOT25andDFN2020-6packages.
PinAssignmentsFeatures300mALowDropoutRegulatorwithENVerylowIQoverfullload:65AWideinputvoltagerange:2Vto6VWideadjustableoutput:0.
8Vto5.
0VFixedoutputoptions:1.
0Vto3.
3VPSRR:65dBtypicalat100HzFaststart-uptime:80sStablewithlowESR,1FceramicoutputcapacitorExcellentLoad/LineTransientResponseLowdropout:300mVtypicalat300mACurrentlimitprotectionShortcircuitprotectionThermalshutdownprotectionAmbienttemperaturerange:-40Cto85°CSOT25andDFN2020-6:Availablein"Green"MoldingCompound(NoBr,Sb)LeadFreeFinish/RoHSCompliant(Note1)ApplicationsXDSLRoutersWirelessLANCardsDesktopandNotebookComputersBatteryPoweredEquipmentsNotes:1.
EUDirective2002/95/EC(RoHS).
AllapplicableRoHSexemptionsapplied.
Pleasevisitourwebsiteathttp://www.
diodes.
com/products/lead_free.
htmlINENOUT5321GNDNC4GNDOUT4INENNC5321NC6GNDOUT4INENNC5321ADJ6SOT25(FixedOutput)(TopView)SOT25(ADJOutput)(TopView)DFN2020-6(FixedOutput)(TopView)DFN2020-6(ADJOutput)(TopView)AP7331300mA,LOWQUIESCENTCURRENT,FASTTRANSIENTLOWDROPOUTLINEARREGULATORAP7331Documentnumber:DS31914Rev.
3-22of13www.
diodes.
comJanuary2011DiodesIncorporatedTypicalApplicationCircuit1uFINGNDENOUTEnable1uFVINVOUTAP7331FixedOutput1uFINGNDENOUTEnableADJR2R11uFVINVOUTAP7331AdjustableOutputPinDescriptionsPinNamePinNumberDescriptionSOT25(fixed)DFN2020-6(fixed)SOT25(adj)DFN2020-6(adj)IN1313Voltageinputpin.
Bypasstogroundthroughatleast1FcapacitorGND2222GroundEN3131Enableinput,activehighADJ--46OutputfeedbackpinNC45,6-5NoconnectionOUT5454Voltageoutputpin.
Bypasstogroundthrough1FceramiccapacitorFunctionalBlockDiagramINENGNDOUTGateDriver0.
4VCurrentLimitandThermalShutdownFixedVersionRRINENGNDADJOUTGateDriver0.
4VCurrentLimitandThermalShutdownAdjustableVersion+=2R1R1REFVOUTVAP7331300mA,LOWQUIESCENTCURRENT,FASTTRANSIENTLOWDROPOUTLINEARREGULATORAP7331Documentnumber:DS31914Rev.
3-23of13www.
diodes.
comJanuary2011DiodesIncorporatedAbsoluteMaximumRatingsSymbolParameterRatingsUnitsESDHBMHumanBodyModelESDProtection6kVESDMMMachineModelESDProtection400VVINInputVoltage7VENVoltageVIN+0.
3VContinuousLoadCurrentInternalLimitedTOPOperatingJunctionTemperatureRange-40~125°CTSTStorageTemperatureRange-65~150°CPDPowerDissipation(Note2)SOT25640mWDFN2020-6740mWTJMaximumJunctionTemperature150°CRecommendedOperatingConditionsSymbolParameterMinMaxUnitVINInputvoltage26VIOUTOutputCurrent(Note3)0300mATAOperatingAmbientTemperature-4085°CNotes:2.
Ratingsapplytoambienttemperatureat25°C3.
Thedevicemaintainsastable,regulatedoutputvoltagewithoutaloadcurrent.
AP7331300mA,LOWQUIESCENTCURRENT,FASTTRANSIENTLOWDROPOUTLINEARREGULATORAP7331Documentnumber:DS31914Rev.
3-24of13www.
diodes.
comJanuary2011DiodesIncorporatedElectricalCharacteristics(TA=25oC,VIN=VOUT+1V,CIN=1uF,COUT=1uF,VEN=2V,unlessotherwisestated)SymbolParameterTestConditionsMinTyp.
MaxUnitIQInputQuiescentCurrentVEN=VIN,IOUT=0mA5575μAVEN=VIN,IOUT=300mA6585ISHDNInputShutdownCurrentVEN=0V,IOUT=0mA1μAILEAKInputLeakageCurrentVEN=0V,OUTgrounded1μAVDropoutDropoutVoltage(Note4)IOUT=300mA300550mVVREFADJReferenceVoltage(Adjustableversion)IOUT=0mA0.
4VIADJADJLeakage(Adjustableversion)1μAVOUTOutputVoltageAccuracyTA=-40oCto85oC,IOUT=30mA-22%ΔVOUT/ΔVIN/VLineRegulationVIN=(VOUT+1V)toVIN-Max,VEN=VIN,IOUT=1mA0.
010.
20%/VΔVOUT/VOUTLoadRegulationVIN=(VOUT+1V)toVIN-Max,IOUTfrom1mAto300mA-0.
60.
6%tSTStart-upTimeVEN=0Vto2.
0V,VOUT=1V,IOUT=300mA80μsPSRRPSRRVIN=[VOUT+1V]VDC+0.
5VppAC,f=100Hz,IOUT=30mA65dBISHORTShort-circuitCurrentVIN=VIN-MintoVIN-Max,VOUTcommendedpadlayout,2ozcopper,singlesided6.
TestconditionsforDFN2020-6:DevicemountedonFR-4substratePCB,withminimumrecommendedpadlayout,2ozcopper,doublesided,bottomlayerisacopperplane.
AP7331300mA,LOWQUIESCENTCURRENT,FASTTRANSIENTLOWDROPOUTLINEARREGULATORAP7331Documentnumber:DS31914Rev.
3-25of13www.
diodes.
comJanuary2011DiodesIncorporatedTypicalCharacteristicsQuiescentCurrentvsInputVoltageIload=300mA5455565758596061624.
34.
54.
74.
95.
15.
35.
55.
75.
96.
1InputVoltage(V)QuiescentCurrent(uA)QuiescentCurrentvsInputVoltageIload=0mA42444648505254564.
34.
54.
74.
95.
15.
35.
55.
75.
96.
1InputVoltage(V)QuiescentCurrent(uA)ReferenceVoltagevsInputVoltage0.
380.
3850.
390.
3950.
40.
4050.
414.
34.
54.
74.
95.
15.
35.
55.
75.
96.
1InputVoltage(V)ReferenceVoltage(V)LineRegulation(%/V)00.
020.
040.
060.
080.
14.
34.
54.
74.
95.
15.
35.
55.
75.
96.
1InputVoltage(V)OutputVoltageVariation(%/V)LoadRegulation(%)-0.
6-0.
4-0.
200.
20.
40.
6050100150200250300OutputCurrent(mA)OutputVoltageVariation(%)DropoutVoltage050100150200250300350400050100150200250300OutputCurrent(mA)DropoutVoltage(mV)90°C-45°C25°C90°C90°C25°C25°C-45°C90°C25°CC-45°C25°C-45°C90°C90°C-45°C25°CC-45°CVOUT=3.
3VVOUT=3.
3VVOUT=3.
3VVIN=VOUT+1VVOUT=3.
3VVIN=VOUT+1VVOUT=3.
3VAP7331300mA,LOWQUIESCENTCURRENT,FASTTRANSIENTLOWDROPOUTLINEARREGULATORAP7331Documentnumber:DS31914Rev.
3-26of13www.
diodes.
comJanuary2011DiodesIncorporatedTypicalCharacteristics(Continued)ShortCircuitvsInputVoltage808590951001051101153.
544.
555.
56InputVoltage(V)OutputCurrent(mA)CurrentLimitvsInputVoltage4004505005506002.
83.
23.
644.
44.
85.
25.
66InputVoltage(V)CurrentLimit(mA)PSRR35404550556065700.
1110100Frequency(kHz)PSRR(dB)PSRR35404550556065700.
1110100Frequency(kHz)PSRR(dB)90°C-45°C25°CCTA=25°CVOUT=1.
8VVOUT=3.
3VVOUT=1.
8VVIN=2.
8VCIN=COUT=1uFTA=25°CVOUT=3.
3VVIN=4.
3VCIN=COUT=1uFTA=25°CAP7331300mA,LOWQUIESCENTCURRENT,FASTTRANSIENTLOWDROPOUTLINEARREGULATORAP7331Documentnumber:DS31914Rev.
3-27of13www.
diodes.
comJanuary2011DiodesIncorporatedTypicalCharacteristics(Continued)Start-UpTime(NoLoad)Time(50us/div)Start-UpTime(300mALoad)Time(50us/div)LineTransientResponseTime(50us/div)LineTransientResponseTime(50us/div)LoadTransientResponseTime(100us/div)LoadTransientResponseTime(100us/div)VEN=0to2V(1V/div)VIN=4.
3VCIN=COUT=1uFVOUT=3.
3V(1V/div)VEN=0to2V(1V/div)VIN=4.
3VCIN=COUT=1uFVOUT=3.
3V(1V/div)VOUT=3.
3V(50mV/div)IOUT=300mA(300mA/div)VIN=5.
3Vto4.
3V(1V/div)Tf=10usVIN=4.
3Vto5.
3V(1V/div)Tr=10usVOUT=3.
3V(50mV/div)IOUT=300mA(300mA/div)IOUT=300mA(300mA/div)IOUT=1mAto300mA(100mA/div)VOUT=3.
3V(100mV/div)Tr=Tf=10usVIN=4.
3VVOUT=0.
8V(100mV/div)IOUT=1mAto300mA(100mA/div)Tr=Tf=10usVIN=2VAP7331300mA,LOWQUIESCENTCURRENT,FASTTRANSIENTLOWDROPOUTLINEARREGULATORAP7331Documentnumber:DS31914Rev.
3-28of13www.
diodes.
comJanuary2011DiodesIncorporatedApplicationNoteInputCapacitorA1μFceramiccapacitorisrecommendedtoconnectbetweenVINandGNDpinstodecoupleinputpowersupplyglitchandnoise.
Theamountofthecapacitancemaybeincreasedwithoutlimit.
Thisinputcapacitormustbelocatedascloseaspossibletothedevicetoassureinputstabilityandlessnoise.
ForPCBlayout,awidecoppertraceisrequiredforbothVINandGND.
AlowerESRcapacitorallowstheuseoflesscapacitance,whilehigherESRtyperequiresmorecapacitance.
OutputCapacitorTheoutputcapacitorisrequiredtostabilizeandhelptransientresponseforLDO.
TheAP7331isstablewithverysmallceramicoutputcapacitors.
Therecommendedcapacitanceisfrom1μFto4.
7μF,EquivalentSeriesResistance(ESR)isfrom10mΩto200mΩ,andtemperaturecharacteristicisX7RorX5R.
Highercapacitancevalueshelptoimproveload/linetransientresponse.
Theoutputcapacitancemaybeincreasedtokeeplowundershoot/overshoot.
PlaceoutputcapacitorascloseaspossibletoOUTandGNDpins,andkeeptheleadsasshortaspossible.
AdjustableOperationTheAP7331providesoutputvoltagefrom0.
8Vto5.
0Vthroughexternalresistordividerasshownbelow.
1uFINGNDENOUTEnableADJR2R11uFVINVOUTAP7331Theoutputvoltageiscalculatedby:+=2R1R1REFVOUTVWhereVREF=0.
4V(theinternalreferencevoltage)Rearrangingtheequationwillgivethefollowingthatisusedforadjustingtheoutputtoaparticularvoltage:=1REFVOUTV2R1RTomaintainthestabilityoftheinternalreferencevoltage,R2needtobekeptsmallerthan125kΩ.
NoLoadStabilityOtherthanexternalresistordivider,nominimumloadisrequiredtokeepthedevicestable.
Thedevicewillremainstableandregulatedinnoloadcondition.
ON/OFFInputOperationTheAP7331isturnedonbysettingtheENpinhigh,andisturnedoffbypullingitlow.
Ifthisfeatureisnotused,theENpinshouldbetiedtoINpintokeeptheregulatoroutputonatalltime.
Toensureproperoperation,thesignalsourceusedtodrivetheENpinmustbeabletoswingaboveandbelowthespecifiedturn-on/offvoltagethresholdslistedintheElectricalCharacteristicssectionunderVILandVIH.
CurrentLimitProtectionWhenoutputcurrentatOUTpinishigherthancurrentlimitthreshold,thecurrentlimitprotectionwillbetriggeredandclamptheoutputcurrenttoapproximately600mAtopreventover-currentandtoprotecttheregulatorfromdamageduetooverheating.
ShortCircuitProtectionWhenOUTpinisshort-circuittoGNDorOUTpinvoltageislessthan200mV,shortcircuitprotectionwillbetriggeredandclamptheoutputcurrenttoapproximately100mA.
Thisfeatureprotectstheregulatorfromover-currentanddamageduetooverheating.
ThermalShutdownProtectionThermalprotectiondisablestheoutputwhenthejunctiontemperaturerisestoapproximately+140°C,allowingthedevicetocooldown.
Whenthejunctiontemperaturereducestoapproximately+125°Ctheoutputcircuitryisenabledagain.
Dependingonpowerdissipation,thermalresistance,andambienttemperature,thethermalprotectioncircuitmaycycleonandoff.
Thiscyclinglimitstheheatdissipationoftheregulator,protectingitfromdamageduetooverheating.
UltraFastStart-upAfterenabled,theAP7331isabletoprovidefullpowerinaslittleastensofmicroseconds,typically80s,withoutsacrificinglowgroundcurrent.
Thisfeaturewillhelploadcircuitrymoveinandoutofstandbymodeinrealtime,eventuallyextendbatterylifeformobilephonesandotherportabledevices.
FastTransientResponseFasttransientresponseLDOscanextendbatterylife.
TDMA-basedcellphoneprotocolssuchasGlobalSystemforMobileCommunications(GSM)haveatransmit/receivedutyfactorofonly12.
5percent,enablingpowersavingsbyputtingmuchofthebasebandcircuitryintostandbymodeinbetweentransmitcycles.
Inbasebandcircuits,theloadoftentransitionsvirtuallyinstantaneouslyfrom100Ato100mA.
Tomeetthisloadrequirement,theLDOmustreactveryquicklywithoutalargevoltagedroporovershoot—arequirementthatcannotbemetwithconventional,general-purposeLDOs.
AP7331300mA,LOWQUIESCENTCURRENT,FASTTRANSIENTLOWDROPOUTLINEARREGULATORAP7331Documentnumber:DS31914Rev.
3-29of13www.
diodes.
comJanuary2011DiodesIncorporatedApplicationNote(Continued)FastTransientResponse(Continued)TheAP7331'sfasttransientresponsefrom0to300mAprovidesstablevoltagesupplyforfastDSPandGSMchipsetwithfastchangingload.
SmallOvershootandUndershootTheAP7331hassmallandcontrolledovershootandundershootinloadandlinetransitions.
Thishelpstoprotectsuppliedcircuitfromdamageandoperationerrorcausedbyglitches.
ThisfeaturealsopermitstheusageofsmallvalueoutputdecouplingcapacitorwithAP7331.
LowQuiescentCurrentTheAP7331,consumingonlyaround65Aforallinputrangeandoutputloading,providesgreatpowersavinginportableandlowpowerapplications.
WideOutputRangeTheAP7331,withawideoutputrangeof0.
8Vto5.
0V,providesaversatileLDOsolutionformanyportableapplications.
OrderingInformationAP7331-XXXXG-7PackingPackageGreenW:SOT25G:Green7:Tape&ReelSN:DFN2020-6Blank:ADJ10:1.
0VOutput12:1.
2V15:1.
5V18:1.
8V25:2.
5V28:2.
8V30:3.
0V33:3.
3V20:2.
0VDevicePackageCodePackaging(Note7)7"TapeandReelQuantityPartNumberSuffixAP7331-XXWG-7WSOT253000/Tape&Reel-7AP7331-XXSNG-7SNDFN2020-63000/Tape&Reel-7Note:7.
PadlayoutasshownonDiodesInc.
suggestedpadlayoutdocumentAP02001,whichcanbefoundonourwebsiteathttp://www.
diodes.
com/datasheets/ap02001.
pdf.
MarkingInformation1.
SOT25AP7331300mA,LOWQUIESCENTCURRENT,FASTTRANSIENTLOWDROPOUTLINEARREGULATORAP7331Documentnumber:DS31914Rev.
3-210of13www.
diodes.
comJanuary2011DiodesIncorporated123574XXYWX(TopView)XX:IdentificationcodeW:Week:A~Z:1~26week;X:A~Z:GreenY:Year0~9a~z:27~52week;zrepresents52and53weekDevicePackageIdentificationCodeAP7331-ADJSOT25QJAP7331-10SOT25QKAP7331-12SOT25QLAP7331-15SOT25QMAP7331-18SOT25QNAP7331-20SOT25QTAP7331-25SOT25QPAP7331-28SOT25QQAP7331-30SOT25QRAP7331-33SOT25QS2.
DFN2020-6Y:Year:0~9(TopView)YWXXXXX:IdentificationCodeX:A~Z:GreenW:Week:A~Z:1~26week;a~z:27~52week;zrepresents52and53weekDevicePackageIdentificationCodeAP7331-ADJDFN2020-6QJAP7331-10DFN2020-6QKAP7331-12DFN2020-6QLAP7331-15DFN2020-6QMAP7331-18DFN2020-6QNAP7331-20DFN2020-6QTAP7331-25DFN2020-6QPAP7331-28DFN2020-6QQAP7331-30DFN2020-6QRAP7331-33DFN2020-6QSPackageOutlineDimensions(AllDimensionsinmm)1.
PackageType:SOT25AP7331300mA,LOWQUIESCENTCURRENT,FASTTRANSIENTLOWDROPOUTLINEARREGULATORAP7331Documentnumber:DS31914Rev.
3-211of13www.
diodes.
comJanuary2011DiodesIncorporated2.
PackageType:DFN2020-60.
05MCABB0.
15BottomViewAC0/0.
050.
57/0.
630.
15max.
C0.
15C2x-2x0.
08C0.
05CSeatingplane1.
45/1.
651.
95/2.
0750.
30/0.
400.
2/0.
30.
65nom.
0.
76/0.
961.
95/2.
075Pin#1IDR0.
1Marking0.
43mon.
(Activeareadepth)TapeOrientation(Note8)DFN2020-6AP7331300mA,LOWQUIESCENTCURRENT,FASTTRANSIENTLOWDROPOUTLINEARREGULATORAP7331Documentnumber:DS31914Rev.
3-212of13www.
diodes.
comJanuary2011DiodesIncorporatedNotes:8.
Thetapingorientationoftheotherpackagetypecanbefoundonourwebsiteathttp://www.
diodes.
com/datasheets/ap02007.
pdfAP7331300mA,LOWQUIESCENTCURRENT,FASTTRANSIENTLOWDROPOUTLINEARREGULATORAP7331Documentnumber:DS31914Rev.
3-213of13www.
diodes.
comJanuary2011DiodesIncorporatedIMPORTANTNOTICEDIODESINCORPORATEDMAKESNOWARRANTYOFANYKIND,EXPRESSORIMPLIED,WITHREGARDSTOTHISDOCUMENT,INCLUDING,BUTNOTLIMITEDTO,THEIMPLIEDWARRANTIESOFMERCHANTABILITYANDFITNESSFORAPARTICULARPURPOSE(ANDTHEIREQUIVALENTSUNDERTHELAWSOFANYJURISDICTION).
DiodesIncorporatedanditssubsidiariesreservetherighttomakemodifications,enhancements,improvements,correctionsorotherchangeswithoutfurthernoticetothisdocumentandanyproductdescribedherein.
DiodesIncorporateddoesnotassumeanyliabilityarisingoutoftheapplicationoruseofthisdocumentoranyproductdescribedherein;neitherdoesDiodesIncorporatedconveyanylicenseunderitspatentortrademarkrights,northerightsofothers.
AnyCustomeroruserofthisdocumentorproductsdescribedhereininsuchapplicationsshallassumeallrisksofsuchuseandwillagreetoholdDiodesIncorporatedandallthecompanieswhoseproductsarerepresentedonDiodesIncorporatedwebsite,harmlessagainstalldamages.
DiodesIncorporateddoesnotwarrantoracceptanyliabilitywhatsoeverinrespectofanyproductspurchasedthroughunauthorizedsaleschannel.
ShouldCustomerspurchaseoruseDiodesIncorporatedproductsforanyunintendedorunauthorizedapplication,CustomersshallindemnifyandholdDiodesIncorporatedanditsrepresentativesharmlessagainstallclaims,damages,expenses,andattorneyfeesarisingoutof,directlyorindirectly,anyclaimofpersonalinjuryordeathassociatedwithsuchunintendedorunauthorizedapplication.
ProductsdescribedhereinmaybecoveredbyoneormoreUnitedStates,internationalorforeignpatentspending.
ProductnamesandmarkingsnotedhereinmayalsobecoveredbyoneormoreUnitedStates,internationalorforeigntrademarks.
LIFESUPPORTDiodesIncorporatedproductsarespecificallynotauthorizedforuseascriticalcomponentsinlifesupportdevicesorsystemswithouttheexpresswrittenapprovaloftheChiefExecutiveOfficerofDiodesIncorporated.
Asusedherein:A.
Lifesupportdevicesorsystemsaredevicesorsystemswhich:1.
areintendedtoimplantintothebody,or2.
supportorsustainlifeandwhosefailuretoperformwhenproperlyusedinaccordancewithinstructionsforuseprovidedinthelabelingcanbereasonablyexpectedtoresultinsignificantinjurytotheuser.
B.
Acriticalcomponentisanycomponentinalifesupportdeviceorsystemwhosefailuretoperformcanbereasonablyexpectedtocausethefailureofthelifesupportdeviceortoaffectitssafetyoreffectiveness.
Customersrepresentthattheyhaveallnecessaryexpertiseinthesafetyandregulatoryramificationsoftheirlifesupportdevicesorsystems,andacknowledgeandagreethattheyaresolelyresponsibleforalllegal,regulatoryandsafety-relatedrequirementsconcerningtheirproductsandanyuseofDiodesIncorporatedproductsinsuchsafety-critical,lifesupportdevicesorsystems,notwithstandinganydevices-orsystems-relatedinformationorsupportthatmaybeprovidedbyDiodesIncorporated.
Further,CustomersmustfullyindemnifyDiodesIncorporatedanditsrepresentativesagainstanydamagesarisingoutoftheuseofDiodesIncorporatedproductsinsuchsafety-critical,lifesupportdevicesorsystems.
Copyright2011,DiodesIncorporatedwww.
diodes.
com

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