2.8V19.83.3V>10-mA>500-mA

ZHCS902B–MARCH2012–REVISEDJUNEThunderbolt?電源選擇集成電路查詢樣品TPS22985是一款電源選擇器件，此器件用于OUTVDD的反向電流UARTRXTXThunderboltFETFETFETFETCFG2CableuCandCDR

OUTAOUTB3.3V在正常模式下，當(dāng)一個有效電源出現(xiàn)時，OUTA一直ENB輸入為高電平時，OUTB被連接至一個有效VDD。在控制模式中，OUTA功能與正常模式下一樣而OUTB由一個受輸入和VDD1及VDD2上的有效VDD可用時，此器件在ENB上等待一個上升輸入，然后在下一個下降RXH轉(zhuǎn)變到來前，斷開OUTB。一旦下一個下降RXH轉(zhuǎn)變發(fā)生時，此器件重新連接OUTB。時，TPS22985打開所有開關(guān)并且輸出OUTA和VDD13.6V時，VDD2TPS229851.6mmx1.6mm晶圓級(WCSP1.Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsofTexasInstrumentssemiconductorproductsanddierstheretoappearsattheendofthisdatasheet.ThunderboltisatrademarkofInCopyright?2012,TexasInstrumentsPRODUCTIONDATAinformationiscurrentasofpublicationdate.ProductsconformtospecificationsperCopyright?2012,TexasInstrumentsInstrumentsstandardwarranty.Productionprocessingdoes EnglishDataSheet:necessarilyincludetestingofallThesedeviceshavelimitedbuilt-inESDprotection.TheleadsshouldbeshortedtogetherorthedevicecedinconductivefoamduringstorageorhandlingtopreventelectrostaticdamagetotheMOSgates.ORDERINGPARTPACKAGEDEVICESPECIFIC(1)Y=Year,M=Month,D=SequenceCode,9U=TPS22985DeviceCode,S=WaferFab/AssemblySiteTopBump4 11 4 DD D CC C BB B DieSize:1.6mmx1.6mmBumpSize:0.25mmBumpPitch:0.4mmTable1.TPS22985PinMap(Top4321DCBADISSIPATIONTHERMALTA=25°CTA=105010.5Simulatedwithhigh-K umpowerdissipationisafunctionofTJ(max),θJAandTA.The umallowablepowerdissipationatanyallowableambienttemperatureisPD=(TJ(max)–TA)/θJA.ABSOLUTEUMoveroperating-airtemperaturerange(unlessotherwisenoted)(1) VoltagerangeonVDD1,VDD2,OUTA,–0.3toVVoltagerangeonRXC,TXC,RESETZ,CFG/OE,ENB(3)(VDDistheactive3.3V–0.3toVVoltagerangeon–0.3toVVoltagerangeonRXH,–0.3toV Operatingambienttemperature–40toTJ umoperatingjunction Storagetemperature–65toChargeDeviceModel(JESD22VHumanBodyModel(JESD222ContactdischargeonVDD1,VDD2(IEC61000-4-Stressesbeyondthoselistedunderabsolute umratingsmaycausepermanentdamagetothedevice.Thesearestressratingsonly,andfunctionaloperationofthedeviceattheseoranyotherconditionsbeyondthoseindicatedunder mendedoperatingconditionsisnotimplied.Exposuretoabsolute– um–ratedconditionsforextendedperiodsmayaffectdevicereliability.Inapplicationswherehighpowerdissipationand/orpoorpackagethermal ispresent,theumambienttemperaturemayhavetobederated. umambienttemperature[TA(max)]isdependentonthe umoperatingjunctiontemperature[TJ(max)],theumpowerdissipationofthedeviceintheapplication[PD(max)],andthejunction-to-ambientthermal ofthepart/packageintheapplication(θJA),asgivenbythefollowingequation:TA(max)=TJ(max)–(θJA×PD(max))AllvoltagevaluesarewithrespecttonetworkgroundIECtestsarerunwith0.1μFonVDD1andVDD2.IECratingisnon-MENDEDOPERATINGSupplyvoltageVILFET1andFET2switchcurrent0ILFET3andFET4switchcurrent0InputlogicRXH,TXC,CFG/OE,2VInputlogicRXH,TXC,CFG/OE,VOutputlogicRXC,TXH,VOutputlogicRXC,TXH,VOutputcapacitanceon14Outputcapacitanceon4OOutputcapacitanceon2OperatingtemperatureELECTRICALUnlessotherwisenotedthespecificationappliesovertheVDDrangeandoperatingjunctiontemp–40°C≤TJ≤85°C.TypicalvaluesareforVDD=3.3VandTJ=25°CTESTPOWERSAND InputvoltageV VDD1QuiescentVDD1=2.5to15IDD- VDD2QuiescentVDD2=3.3V,VDD1=3.3VDD2=3.3V,VDD1=15IDDOFF- VDD2OffVDD2=3.3V,VDD1=01 ENBInputVN=1.8Vto3.61 RXHInputVN=1.8Vto3.61 CFG/OEInputVCFG/OE=0 CFG/OEpull-upV RESETZInputVRESETZ=10023SWITCHAND FET1VDD=3.3V,IOUT=105Ω FET25 FET3VDD=3.3V,IOUT=350 FET4 RESETZPull-RESETZΩ CFG/OEPull- 2 TXCPull-SeetheUARTRXandTXVOLTAGETHESHOLDSANDHighvoltage3.3VSupplyV Undervoltage3.3VSupplyV3.3VSupply ChargepumpO=2nF,ICPO=0789V VoltageovershootonCOUTB=4μF,IOUTB=0mA,COUTA=1μF,IOUTA=0VDD1SR33→4V=10CFG/OEispulleduptoVPUCFGOEthrough ELECTRICALCHARACTERISTICS(UnlessotherwisenotedthespecificationappliesovertheVDDrangeandoperatingjunctiontemp–40°C≤TJ≤85°C.TypicalvaluesareforVDD=3.3VandTJ=25°CTESTTHERMALShutdownShutdownTRANSITIONUVLOtoFETnopenCOUTB=4μF,COUTA=1UVLOtoFETnclosed2HVLOtoFETnopenHVLOtoFETnclosedSeeTheSupplySwitch-OverDuringHVLOTRANSITIONTIMING(NORMALENBtoFET3/4closedCOUTB=4μF,COUTA=12ENBtoFET3/4openTRANSITIONTIMING(CONTROLUVLOtoRESETZ567ENBtoRESETZ2ENBtoFET3/4openCOUTB=4μF,COUTA=1RXtoFET3/4closedCOUTB=4μF,COUTA=1 RXtoRESETZ567OEtoTXHValidOEtoTXHHi-ZTXC/TXHI/O(CONTROLTXCInputlogic2VTXCInputlogicVTXHOutputlogicVTXHOutputlogicVTR/TXHRiseandfall10-90%CL=205TXHOutputΩTXInputsignal1TXDutyRXC/RXHI/O(CONTROLRXHInputlogic2VRXHInputlogicVRXCOutputlogicVRXCOutputlogicVTR/RXCRiseandfall10-90%CL=20RXInputsignal1RXDutyFETRESETFETFETRESETFETFET3Figure2.FunctionalBockDEVICEPINPINDeviceSupply1.0Vto19.8-VDeviceSupply2.0Vto19.8-VOutputA.10-mAcapableoutput.RefertotheSupplySelectionsectionformoreOutputB.500-mAcapableoutput.RefertotheNormalModeandControlModesectionsformoreChargePumpOutput.Thispinistheoutputoftheinternalchargepump.ItdrivesthegatesoftheinternalFETswitches.Connectacapacitorofatleast2nFtothispin.ModeConfiguration/OutputEnable.WhenCFGisfloating,thedeviceisinNormalMode.WhenCFGisground,thedeviceisinControlMode(seetheAPPLICATIONINFORMATIONsectionformoreinformation).Themodeislatchedatpower-up.WhenthedeviceentersControlMode,thispin esanoutputenablefortheUARTTXHoutput.SeetheUARTRXandTXsectionformoreinformation.Apull-downbetweenthispinandGNDis mendedwhenControlModeisdesired.UARTRXInput.MonitoredInputfordataactivitytoenableoutputs.InControlMode,thispinismonitoredforahightolowtransitiontoenabletheoutputs.ThisinputislevelshiftedanddrivenonRXC.SeetheUARTRXandTXsectionformoreinformation.UARTRXOutput.ThisoutputisalevelshiftedversionofRXH.RXCisreferencedtoOUTA.SeetheUARTRXandTXsectionformoreinformation.UARTTXInput.ThisinputisbufferedandlevelshiftedonTXH.SeetheUARTRXandTXsectionformoreUARTTXOutput.ThisoutputisabufferedandlevelshiftedversionofTXC.TXHisreferencedtoOUTA.SeetheUARTRXandTXsectionformoreinformation.MicrocontrollerReset.ThispinisadelayedresetsignalindicatingOUTBisconnectedtoavalidVDD.RESETZinanopen-drainpull-down.RESETZislowwhenOUTBishighimpedance.OUTBEnable.InNormalMode,thispinistheactivehighOUTBenable.InControlMode,thispinopensOUTBwhenassertedhighandresetsthedeviceuntilanewtransitiononRXoccurs.DeviceAPPLICATIONSupplyTheTPS22985selectsbetweentwoseperatepowers,VDD1orVDD2,andconnectsthesetotwooutputs(OUTAandOUTB)throughnon-currentlimitedswitches.WhenavalidVDD(VUVLO<VDD<VHVLO)ispresentonVDD1,VDD1willbeconnectedtotheoutputs.WhenVDD1>VHVLO,theTPS22985willconnecttheoutputstoVDD2whenavalidVDDispresentonthisinput.OUTBisalsoopenedandclosedbyotherdigitalinputs,ENBandRXH,dependingonthemodeoftheTPS22985.RefertotheNormalModeandControlModesectionsformoreinformationonthecontrolofOUTB.VDD1andVDD2canpowerupinanyorder;however,VDD1alwaystakespriorityoverVDD2andonlyallowsVDD2toconnectwhentheVDD1>VHVLOconditionispresent.WhentheoutputsareconnectedtoVDD2,andVDD1dropsbelowVHVLO,theTPS22985willdisconnecttheoutputsfromVDD2.Figure3showsaflowdiagramillustratingtheselectionofVDD1orVDD2astheappropriatesupplytoconnecttoOUTAandOUTB.Note,thisdiagramdoesnotshowtheenablinganddisablingofOUTBbyENBandRXH.VH<RSW(MIN)*SoftstartturnsonlimitednumberoflegswhenOUTislessthanVDDtopreventsupplyfromcurrentlimiting.OnceOUTiswithinVHofVDD,alllegsturnontoget Figure3.FlowDiagramofSupplySelectionandSwitch-NormalWhentheCFG/OEpinisfloatingatpower-up,thedeviceentersNormalMode.InNormalMode,theTPS22985providespowerviaOUTAandOUTB.OUTAisconnectedwheneveravalidVDDispresentonVDD1.OUTAmayalsobeconnectedifVDD1>VHVLOandavalidVDDisconnectedtoVDD2.WhenOUTAisconnecteditwillsupply≥10mAtoaload.OUTBisconnectedwheneveravalidVDDispresentonVDD1.OUTBmayalsobeconnectedifVDD1>VHVLO,avalidVDDisconnectedtoVDD2,andthecontrolsignalENBishigh.WhenOUTBisconnecteditwillsupply≥500mAtoaload.WhenavalidVDDisnotpresent,theTPS22985entersintoashutdownmodeandblockscurrentflowthroughtheRESETFETRESETFETFET41Figure4.NormalModeTypical=====Figure5.TimingDuringNormalControlWhenCFG/OEpinisgroundedatpower-up,thedevicelatchesintoControlMode.InControlMode,theTPS22985providespowertoamicrocontroller/CDRdevice.WhenavalidVDDisconnected,OUTAandOUTBareconnectedtotheVDD.OUTBremainsconnectedtoVDDuntilENBtransitionshigh.OUTAremainsconnectedtoVDDaslongasavalidVDDexists.RESETZindicatesthatavalidVDDisavailableatOUTB.WhenRESETZislow,avalidVDDisnotavailable,ifRESETZishigh,avalidVDDisavailable.WhenENBtransitionshigh,RESETZisassertedlowandOUTBisopeneduntilafallingedgeonRXHisdetected,asillustratedinFigure7andFigure8.WhenENBtransitionshigh,RESETZwillassertlowaftertimetE2RandOUTBwillopenaftertimetE2O.DuringthetimetE2O,RXHisnotmonitored.AfterthetimetE2O,theTPS22985startsmonitoringRXHforafallingedge.WhenafallingedgeoccursandavalidVDDisavailable,RESETZistransitionedfromlowtohighandOUTBisconnectedtoVDDuntilENBtransitionshighagainoruntilnovalidVDDisavailable.WhenavalidVDDisnotavailable,RESETZisassertedlowandtheTPS22985blockscurrentflowthroughtheAfterthedeviceislatchedintoControlMode,theCFG/OEpin estheoutputenablefortheTXbuffer/level-shifter.RefertotheUARTRXandTXsectionformoreinformation.OUTAcanbeusedasapull-upfortheThunderboltTMCFG2connectorpinasanindicatorthatpowerisavailabletothecableactivecircuitry.cearesistorgreaterthan1kΩbetweenOUTAandCFG2inthiscase.RESETFETFETRESETFETFETFETFETCFG2CableuCandCDRFigure6.ControlModeTypicalFigure7.TimingDuringControlFigure8.TimingDuringControlMode1212Figure9.TypicalStartupinNormal1212

Figure10.TypicalStartupTimingforControlFigure10.TypicalStartupTimingforControlSoftTopreventinrushcurrenttotheload,theTPS22985softstartsOUTAandOUTB.WhenOUTAandOUTBarefirstenabled,the oftheFETswitches(FET1,FET2,FET3,andFET4)startshighandreducesevery250μsinfoursteps.Figure11showsthenominalrampprofileforOUTB.TheshowninthisfigureistheequivalentthroughFET3andFET4inFigure1.6 Figure11.OUTBSoft vsTimeSupplySwitch-OverDuringWhenOUTAandOUTBareconnectedtoVDD1andVDD1crossesVHVLO,theTPS22985willopentheFET1/3switches.Duetothedelaytdh,theoutputwillovershootVHVLObyVOS.WhenavalidVDDispresentonVDD2,OUTAandOUTBwillconnecttoVDD2aftertimeteh.Figure12illustratesthisswitch-overevent.TheovershootVOSwilloccurwhentheVDD(VDD1orVDD2)thatisconnectedtotheoutputtransitionsaboveVHVLO.VOSissetbythedelaytdhandtheslewrateoftheconnectedVDD.However,theconnectionoftheoutputstoVDD2willonlyoccurwhenVDD1transitionsaboveVHVLOandVDD2isavalidVDD.ThefollowingequationdeterminestheovershootVOS=SRVDD× SRVDDistheslewrateofthesupplythatistransitioningaboveVHVLO.Asanexample,whenSRVDDis10mV/μsandtdhis20μs,VOSis200mV.WhenswitchingtoVDD2duetoanHVLOeventonVDD1,theoutputsOUTAandOUTBaredischargedbytheirrespectiveloadsuntiltheyreachtheVDD2voltage.Thispreventsin-rushcurrentwhenchargingtheoutputcaps.Thedischargetimetehisvariableandisdeterminedbythefollowingequation.teh=tdh+(VHVLO+VOS–VDD2)× Inthisequation,VOSisdeterminedbyEquation1,CLOADistheloadcapacitanceattherespectiveoutput,andILOADisloadcurrentflowingoutofthesameoutput.Asanexample,whenVDD2is3.3V,tdhis20μs,VOSis200mV,CLOADis4μF,andILOADis350mA,theresultingtehis25.7μs. ConnectedtoConnectedtoNote,whenVDD1transitionsaboveVHVLOandavalid ConnectedtoConnectedtoFET1/3FET2/4Figure12.VDDswitch-overatVDD1risingaboveUARTRXandTheTPS22985providesfailsafebuffersfordigitalUARTRXandTXlines.ThefailsafemechanismpreventstheRXandTXlinesfrombeingloadedwhenpowerisremovedfromthedevice.TheRXlineisdividedintoahostsideRXHinputandacablesideRXCoutput.TheTXlineisdividedintohostsideTXHoutputandacablesideTXCTheRXHandTXCinputsareusedinControlModeonlyandmustbepulledlowwhenthedeviceisinNormalMode.InNormalMode,leavetheRXHandTXCpinsdisconnectedfromtheUARTsignallinesandpulllowthrougha>1kΩ.InControlMode,whentheTPS22985isunpoweredorwhenRESETZisassertedlow,theTXHoutputishighimpedance.ThispreventsloadingthesystemTXlineandallowingotherdevicesontheUARTbustocommunicate.TheRXCoutputispulledlowthroughtheoutputdriverduringthissamecondition.GNDGND GNDHi TXC HiZ TXCHi Figure13.UARTRXandTXBufferControlDuringControlFigure14.CFG/OEtoTXHTimingDuringControlTHUNDERBOLTTMSYSTEMWITHFigure15.ThunderboltSystemwithD:Max1.60mm,Min1.54E:MaxD:Max1.60mm,Min1.54E:Max1.60mm,Min1.54PACKAGEOPTION11-Apr-PACKAGINGOrderablePackageEcoLead/BallMSLPeakOpTempTop-SideCallCall-40to&noSb/Br)CallLevel-1-260C--40to(1)ThemarketingstatusvaluesaredefinedasACTIVE:Product mendedfornewLIFEBUY:TIhasannouncedthatthedevicewillbedis,andalifetime-buyperiodisinNRND: mendedfornewdesigns.Deviceisinproductiontosupportexistingcustomers,butTIdoes mendusingthispartinanewPREVIEW:Devicehasbeenannouncedbutisnotinproduction.SamplesmayormaynotbeOBSOLETE:TIhasdistheproductionofthe(2)Econ-Thennedeco-friendlyclassification:Pb-(RoHS),Pb-(RoHSExempt),orGreen(RoHS&noSb/Br)-pleasecheck informationandadditionalproductcontentdetails.TBD:ThePb-/Green nhasnotbeenPb-(RoHS):TI'sterms"Lead- "or"Pb-"meansemiconductorproductsthatarecompatiblewiththecurrentRoHSrequirementsforall6substances,includingtherequirementthatleadnotexceed0.1%byweightinhomogeneousmaterials.Wheredesignedtobesolderedathightemperatures,TIPb-productsaresuitableforuseinspecifiedlead-processes.Pb-(RoHSExempt):ThiscomponenthasaRoHSexemptionforeither1)lead-basedflip-chipsolderbumpsusedbetweenthedieandpackage,or2)lead-baseddieadhesiveusedbetweenthedieandleadframe.ThecomponentisotherwiseconsideredPb-(RoHScompatible)asdefinedabove.Green(RoHS&noSb/Br):TIdefines"Green"tomeanPb-(RoHScompatble),andofBromine(Br)andAntimony(Sb)basedflameretardants(BrorSbdonotexceed0.1%byweightinhomogeneousmaterial)(3)MSL,PeakTemp.--TheMoistureSensitivityLevelratingaccordingtotheJEDECindustrystandardclassifications,andpeaksolder(4)MultipleTop-SideMarkingswillbeinsideparentheses.OnlyoneTop-SideMarkingcontainedinparenthesesandseparatedbya"~"willappearonadevice.IfalineisindentedthenitisacontinuationofthepreviouslineandthetwocombinedrepresenttheentireTop-SideMarkingforthatdevice.ImportantInformationandDier:TheinformationprovidedonthispagerepresentsTI'sknowledgeandbeliefasofthedatethatitisprovided.TIbasesitsknowledgeandbeliefoninformationpr