设计参考、源码手册1746个

SWFBT.Filename:PMP4080_REVB_bom.xlsDate:02/15/2010Part4C1,C2,C11,Capacitor,Ceramic,6.3V,X5R,+/-1Capacitor,Ceramic,100-pF,50-V,C0G,1Capacitor,Ceramic,6.3V,X5R,+/-2C3,Capacitor,Ceramic,6.3V,X5R,1Capacitor,Ceramic,10V,X5R,1Capacitor,Ceramic,4.7-uF,6.3-V,X5R,1Capacitor,Ceramic,27pF,50-V,X7R,1Capacitor,Ceramic,22-uF,6.3-V,X5R,1Capacitor,Ceramic,180pF,50-V,COG,2J1,Header,2-pin,100milspacing,(36-pin0.100x12510-Connector,MaleStraight2x10pin,100milspacing,40.338x2510-1Inductor,SMT,1.6A,0.118xLPS3010-1Inductor,SMT,1840mA,85-0.250x0.250MSS6132-1Resistor,Chip,162K,1/16W,1Resistor,Chip,324K,1/16W,1Resistor,Chip,1/16W,2R4,Resistor,Chip,1/16W,1Resistor,Chip,562k-Ohms,1/16-W,1Resistor,Chip,100k-Ohms,1/16W,1Resistor,Chip,100k-Ohms,1/16-W,1IC,150mA,LowIq,WideBandwdth,LDOLinear1IC,3MHzSynchronousStepDownConverterwithI²C,CSP-1IC,SwitchingBuckConverter,1.8-V,300-SOT23-Texas1IC,LowQuiescentCurrent ble,1.2-V,DelayTime1msSOT23-1IC,250mA,LowIq,WideBandwdth,LDOLinearSOT23-OMAP-L137/C6747/C6745/C6743TPS62353,TPS62200,TPS71701,TPS73128–(PMP4080)UpdatedThefollowingtestreportincludesmeasurementsforthefollowingoutputvoltagerailsusinga5VThisdesignmeetsthepowersequencingrequirementsrequiredbyOMAP-L137/C6747/C6745/StartUpTPS71701–LDO(1.2V@-output-loadtransientTPS62353–DCDC(1.2V@-output-loadtransient-switch-loadTPS62200–DCDC(3.3V@-output-loadtransient-switch-loadSTARTUPCh1:1.2VLDO(unloaded);TPS71701Ch2:1.2VDCDC(unloaded);TPS62353Ch3:3.3VDCDC(unloaded);TPS62200Ch4:1.8VLDO(unloaded);TPS73218Fig1:StartUpwaveformwithoutputsCh1:1.2V@0.06ALDO;TPS71701Ch2:1.2V@0.6ADCDC;TPS62353Ch3:3.3V@0.165ADCDC;TPS62200Ch4:1.8V@0.05ALDO;TPS73218Fig2:StartUpwaveformwithoutputsfullyTPS71701–LDO(1.2V@0.06A)OUTPUTRIPPLE(TPS71701)Fig3:OutputRipple1.2V@0.06ATPS71701LDO,Fig4:LoadtransientresponseonTPS71701,1.2Voutput(Ch1)forloadstep20mAto60mA(Ch4-33%to100%),atlowline3.6VinFig5:LoadtransientresponseonTPS71701,1.2Voutput(Ch1)forloadstep20mAto60mA(Ch4-33%to100%),athighline6VinTPS62353–DCDC(1.2V@Settooperateinfixed modeinalltestcaseswith3MHz.TPS6235xinfixed modegivesbestloadandlineresponse,andreducedrippleattheexpenseofreducedlightloadefficiency.ThisdefaultmodeisusedintheseUsingtheI2Cinterface,thecontrolregisterscanbeconfiguredforfastorlightpulsefrequencymodulationmodetoincreaseefficiencyatverylightloadandtoreducequiescentcurrent.Usingthecontrolregisters,theTPS6235xisalsoreconfigurableforadjustableslewrateofthestartupramp;synchronizationwithexternalclock;andforactivedischargeofoutputcapacitorinshutdown,aswellasdynamicvoltagescalingbetweenactiveandsleepmode.OUTPUTRIPPLE(TPSFullload,highFig6:OutputRipple1.2V(Ch1)@0.6A(Ch4)TPS62353DCDC,HighlineLightload,highFig7:OutputRipple1.2V(Ch1)@0.05A(Ch4)TPS62353DCDC,HighlineFullload,lowFig8:OutputRipple1.2V(Ch1)@0.6A(Ch4)TPS62353DCDC,LowlineLightload,lowFig9:OutputRipple1.2V(Ch1)@0.14A(Ch4)TPS62353DCDC,lowlineFig10:OutputRipple1.2V(Ch1)@0.05A(Ch4)TPS62353DCDC,lowlineFig11:LoadtransientresponseonTPS62353,1.2Voutput(Ch1)forloadstep300mAto600mA(Ch4-50%to100%),athighline6VinFig12:LoadtransientresponseonTPS62353,1.2Voutput(Ch1)forloadstep150mAto600mA(Ch4-25%to100%),athighline6VinLowFig13:LoadtransientresponseonTPS62353,1.2Voutput(Ch1)forloadstep300mAto600mA(Ch4-50%to100%),atlowline3.6VinFig14:LoadtransientresponseonTPS62353,1.2Voutput(Ch1)forloadstep80mAto600mA(Ch4-15%to100%),atlowline3.6VinSWITCHNODE(TPSTPS62353exhibitsacharacteristicdutycyclejitter.Itoperatesin Fig15:Switchnode1.2V@0.6Awith1.2V@0.6AEfficiencyvs.Load

LoadCurrentFig15:EfficiencyofTPS62353in modewithLOADREGULATION(TPS623531.2V@0.66AOutputVoltagevs.LoadOutputOutputVoltage LoadCurrentFig16:LoadRegulationofTPS62353runningin modewithTPS62200–DCDC(3.3V@TPS62200hasa1-Mhzfixedfrequencypulsewidthmodulation( )atmoderatetoheavyloads.Forlightloads,itautomaticallyswitchestothepulsefrequencymodulation(PFM)toincreaseefficiency.ThecurrentthresholdforwhichtheconverterchangesoperationmodedependsoninputvoltageandalsoifdiscontinuousconductionisOUTPUTRIPPLE(TPSNoFig18:OutputRipple3.3V(Ch1)@noload(Ch4)TPS62200DCDC,Highline5Vin,converterinPFMFullload,highFig17:OutputRipple3.3V(Ch1)@0.165A(Ch4)TPS62200DCDC,Highline6Vin,converted Lightload,highFig19:OutputRipple3.3V(Ch1)@0.05(Ch4)TPS62200DCDC,Highline6Vin,converterinPFMHeavyload,low.Fig20:OutputRipple3.3V(Ch1)@0.165(Ch4)TPS62200DCDC,LowLine3.6Vin,converter Lightload,lowline,worseFig21:OutputRipple3.3V(Ch1)@0.04(Ch4)TPS62200DCDC,LowLine3.6Vin,converterinPFMFig22:LoadtransientresponseonTPS62200,3.3Voutput(Ch1)forloadstep40mAto165mA(Ch4-25%to100%),athighline6VinFig23:LoadtransientresponseonTPS62200,3.3Voutput(Ch1)forloadstep40mAto165mA(Ch4-25%to100%),athighline4VinLowFig24:LoadtransientresponseonTPS62200,3.3Voutput(Ch1)forloadstep40mAto165mA(Ch4-25%to100%),athighline3.6VinSWITCHNODE(TPSFigFig25:Switchmode5Vinput,PowerSaveMode,NoFig26:Switchnode5Vin,3.3Vwithno3.3V@0.165AEfficiencyvs.LoadCurrent5Vin

LoadCurrentFig27:EfficiencyofTPS62200withAtlightload,TPS62200implementsdynamicvoltagepositioningbyincreasingtheouputvoltagebyabout0.8%aboveitsnominalvaluetomitigateagainstthevoltagedropthatmayoccurduringaloadtransientfromlightloadtofullload..3.3V@0.165AOutputVoltagevs.LoadCurrent5VinOutputOutput LoadCurrentFig28:LoadRegulationofTPS62200器(TI)及其下属子公司在不事先通知的情况下，随时对所提供的产品和服务进行更正、修改、增强、改进或其它更改，并时止供何品服。客在订前获取的信，验这信是完且是的。有品售都遵循在订单确认时所提供的TI销售条款与条件。TI保证其所