SW4444mp.com

MP23746.
5V-32VInput,1A,330kHzStep-DownConverterMP2374Rev.
1.
0www.
MonolithicPower.
com11/23/2014MPSProprietaryInformation.
PatentProtected.
UnauthorizedPhotocopyandDuplicationProhibited.
2014MPS.
AllRightsReserved.
TheFutureofAnalogICTechnologyDESCRIPTIONTheMP2374isahighvoltagestep-downconverteridealforautomotivepoweradapterbatterychargers.
Itswide6.
5Vto32Vinputvoltagerangecoverstheautomotivebattery'srequirementsanditachieves1Acontinuousoutputforquickchargecapability.
Currentmodeoperationprovidesfasttransientresponseandeasesloopstabilization.
Faultprotectionincludescycle-by-cyclecurrentlimitingandthermalshutdown.
Inshutdownmode,theconverterdrawsonly20μAofsupplycurrent.
TheMP2374requiresaminimumnumberofreadilyavailableexternalcomponentstocompletea1Astep-downDCtoDCconvertersolution.
FEATURESWide6.
5Vto32VInputOperatingRange34VAbsoluteMaximumInput1AContinuousLoadCurrent120mInternalPowerMOSFETSwitchStablewithLowESROutputCeramicCapacitorsUpto95%Efficiency20μAShutdownModeFixed330KHzFrequencyThermalShutdownCycle-by-CycleOverCurrentProtectionOutputAdjustableFrom1.
23Vto21VUnderVoltageLockoutReferenceVoltageOutputAvailableinan8-PinSOICPackageAPPLICATIONSAutomotivePowerAdaptersPDAandCellularPhoneBatteryChargersAutomotiveAftermarketElectronicsAllMPSpartsarelead-freeandadheretotheRoHSdirective.
ForMPSgreenstatus,pleasevisitMPSwebsiteunderQualityAssurance.
"MPS"and"TheFutureofAnalogICTechnology"areRegisteredTrademarksofMonolithicPowerSystems,Inc.
TYPICALAPPLICATIONINPUT6.
5Vto32VOPENNOTUSEDOUTPUT2.
5VC44.
7nFD1C210nFMP2374BSINFBSWREFGNDCOMPEN13564872OFFONMP2374–6.
5V-32VINPUT,1A,330kHzSTEP-DOWNCONVERTERMP2374Rev.
1.
0www.
MonolithicPower.
com21/23/2014MPSProprietaryInformation.
PatentProtected.
UnauthorizedPhotocopyandDuplicationProhibited.
2014MPS.
AllRightsReserved.
PACKAGEREFERENCEBSINSWGNDREFENCOMPFB12348765TOPVIEWPartNumber*PackageMP2374DSSOIC8TemperatureTopMarking–40°Cto+85°C*ForTape&Reel,addsuffix–Z(eg.
MP2374DS–Z)ForRoHSCompliantPackaging,addsuffix–LF(eg.
MP2374DS–LF–Z)ABSOLUTEMAXIMUMRATINGS(1)INSupplyVoltage.
0.
3Vto+34VSWVoltage.
1VtoVIN+0.
3VBSVoltageVSW–0.
3VtoVSW+6VAllOtherPins.
0.
3Vto+6VJunctionTemperature.
150°CLeadTemperature260°CStorageTemperature65°Cto+150°CRecommendedOperatingConditions(2)InputVoltage6.
5Vto32VOperatingTemperature40°Cto+85°CThermalResistance(3)θJAθJCSOIC8.
90.
.
.
.
.
.
45.
.
.
°C/WNotes:1)Exceedingtheseratingsmaydamagethedevice.
2)Thedeviceisnotguaranteedtofunctionoutsideofitsoperatingconditions.
3)MeasuredonJESD51-7,4-layerPCB.
ELECTRICALCHARACTERISTICSVIN=12V,TA=+25°C,unlessotherwisenoted.
ParameterSymbolConditionMinTypMaxUnitsShutdownSupplyCurrentVEN=0V2035μASupplyCurrentVEN=5V,VFB=1.
4V1.
01.
2mAFeedbackVoltage6.
5V≤VIN≤32V,VCOMPDetermineifthesecondcompensationcapacitor,C3,isrequired.
ItisrequirediftheESRzerooftheoutputcapacitoroccursatlessthanfourtimesthecrossoverfrequency,or1fR5C8CESR≥***πIfthisisthecase,thenaddthesecondcompensationresistor.
Determinethevaluebytheequation:3RR5C3C)MAX(ESR*=WhereRESR(MAX)isthemaximumESRoftheoutputcapacitor.
Example:VOUT=5V,C5=22μFCeramic(ESR=10m)R3≈6.
88x107(22x10-6)(5)=7568Usetheneareststandardvalueof7.
5k.
C4>1.
93x10-5/7.
5K=2.
57nFUsestandardvalueof2.
7nF.
8πxC5xRESRxfC=0.
22,whichislessthan1.
Therefore,nosecondcompensationcapacitor(C3)isrequired.
PCBLayoutGuidePCBlayoutisveryimportanttoachievestableoperation.
PleasefollowtheseguidelinesandtakeFigure2and3forreferences.
1)KeepthepathofswitchingcurrentshortandminimizetheloopareaformedbyInputcap,high-sideandlow-sideMOSFETs.
2)Keeptheconnectionoflow-sideMOSFETbetweenSWpinandinputpowergroundasshortandwideaspossible.
3)Ensureallfeedbackconnectionsareshortanddirect.
Placethefeedbackresistorsandcompensationcomponentsasclosetothechipaspossible.
4)RouteSWawayfromsensitiveanalogareassuchasFB.
5)ConnectIN,SW,andespeciallyGNDrespectivelytoalargecopperareatocoolthechiptoimprovethermalperformanceandlong-termreliability.
Forsinglelayer,donotsolderexposedpadoftheIC51234876FBCOMPENSS/REFBSINSWGNDC6C2Figure2―PCBLayout(SingleLayer)MP2374–6.
5V-32VINPUT,1A,330kHzSTEP-DOWNCONVERTERMP2374Rev.
1.
0www.
MonolithicPower.
com91/23/2014MPSProprietaryInformation.
PatentProtected.
UnauthorizedPhotocopyandDuplicationProhibited.
2014MPS.
AllRightsReserved.
R212348765FBCOMPENSS/REFBSINSWGNDR1TopLayerBottomLayerFigure3―PCBLayout(DoubleLayer)ExternalBootstrapDiodeAnexternalbootstrapdiodemayenhancetheefficiencyoftheregulator,theapplicableconditionsofexternalBSTdiodeare:zVOUT=5Vor3.
3V;andzDutycycleishigh:D=INOUTVV>65%Inthesecases,anexternalBSTdiodeisrecommendedfromtheoutputofthevoltageregulatortoBSTpin,asshowninFig.
4MP2374SWBSTCLBSTC5Vor3.
3VOUTExternalBSTDiodeIN4148+Figure4—AddOptionalExternalBootstrapDiodetoEnhanceEfficiencyTherecommendedexternalBSTdiodeisIN4148,andtheBSTcapis0.
1~1F.
MP2374–6.
5V-32VINPUT,1A,330kHzSTEP-DOWNCONVERTERMP2374Rev.
1.
0www.
MonolithicPower.
com101/23/2014MPSProprietaryInformation.
PatentProtected.
UnauthorizedPhotocopyandDuplicationProhibited.
2014MPS.
AllRightsReserved.
TYPICALAPPLICATIONCIRCUITSINPUT6.
5Vto32VOPENNOTUSEDOUTPUT2.
5VC44.
7nFD1C210nFMP2374BSINFBSWREFGNDCOMPENC3OPENOFFON13564872Figure5—MP2374withMurata22μF/10VCeramicOutputCapacitorINPUT6.
5Vto32VOPENNOTUSEDOUTPUT2.
5VD1C210nFMP2374BSINFBSWREFGNDCOMPENOFFON13564872Figure6—MP2374withPanasonic47μF/6.
3VSpecialPolymerOutputCapacitorMP2374–6.
5V-32VINPUT,1A,330kHzSTEP-DOWNCONVERTERNOTICE:Theinformationinthisdocumentissubjecttochangewithoutnotice.
UsersshouldwarrantandguaranteethatthirdpartyIntellectualPropertyrightsarenotinfringeduponwhenintegratingMPSproductsintoanyapplication.
MPSwillnotassumeanylegalresponsibilityforanysaidapplications.
MP2374Rev.
1.
0www.
MonolithicPower.
com111/23/2014MPSProprietaryInformation.
PatentProtected.
UnauthorizedPhotocopyandDuplicationProhibited.
2014MPS.
AllRightsReserved.
PACKAGEINFORMATIONSOIC80.
016(0.
41)0.
050(1.
27)0o-8oDETAIL"A"0.
010(0.
25)0.
020(0.
50)x45oSEEDETAIL"A"0.
0075(0.
19)0.
0098(0.
25)0.
150(3.
80)0.
157(4.
00)PIN1ID0.
050(1.
27)BSC0.
013(0.
33)0.
020(0.
51)SEATINGPLANE0.
004(0.
10)0.
010(0.
25)0.
189(4.
80)0.
197(5.
00)0.
053(1.
35)0.
069(1.
75)TOPVIEWFRONTVIEW0.
228(5.
80)0.
244(6.
20)SIDEVIEW1485RECOMMENDEDLANDPATTERN0.
213(5.
40)0.
063(1.
60)0.
050(1.
27)0.
024(0.
61)NOTE:1)CONTROLDIMENSIONISININCHES.
DIMENSIONINBRACKETISINMILLIMETERS.
2)PACKAGELENGTHDOESNOTINCLUDEMOLDFLASH,PROTRUSIONSORGATEBURRS.
3)PACKAGEWIDTHDOESNOTINCLUDEINTERLEADFLASHORPROTRUSIONS.
4)LEADCOPLANARITY(BOTTOMOFLEADSAFTERFORMING)SHALLBE0.
004"INCHESMAX.
5)DRAWINGCONFORMSTOJEDECMS-012,VARIATIONAA.
6)DRAWINGISNOTTOSCALE.
0.
010(0.
25)BSCGAUGEPLANEMouserElectronicsAuthorizedDistributorClicktoViewPricing,Inventory,Delivery&LifecycleInformation:MonolithicPowerSystems(MPS):MP2374DS-LF-Z