TPS51117资料
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FEATURESDESCRIPTION
APPLICATIONS
12
314
13
12VBST
DRVH
LLEN_PSV
TON
VOUTTPS51117PW
4
5
6
711
10
9
8TRIP
V5DRV
DRVL
PGNDV5FILT
VFB
PGOOD
GND+VOUT
Q2L1Q1
-PGNDC2C4
C1R6
PGOOD+5V
EN_PSV
R4R1
R2R3VIN
1.8V~28V
C3
GND++
R5TPS51117
SLVS631–DECEMBER2005
SINGLESYNCHRONOUSSTEP-DOWNCONTROLLER
•HighEfficiency,LowPowerConsumption,TheTPS51117isacosteffective,synchronousbuck
4.5-µATypicalShutdownCurrentcontrollerforPOLvoltageregulationinnotebookPC
applications.ThecontrollerisdedicatedforAdaptive•FixedFrequencyEmulatedOn-TimeControl,
On-TimeD-CAP™ModeoperationthatprovidesAdjustablefrom100kHzto550kHzeaseofuse,lowexternalcomponentcount,and•FastTransientResponseexcellentfasttransientresponseatthesametime.
•<1%InitialReferenceAccuracyAuto-skipmodeforhighefficiencydowntothe
milli-ampereloadrange,orPWM-onlymodeforlow•OutputVoltageRange:0.75Vto5.5V
noiseoperationisselectable.•WideInputVoltageRange:1.8Vto28V
Thecurrentsensingschemeforpositiveovercurrent•SelectableAuto-Skip/PWM-OnlyOperationandnegativeovercurrentprotectionisloss-less•TemperatureCompensated(4500ppm/°C)low-sideRDS(on)sensingplustemperatureLow-SideRDS(on)OvercurrentSensingcompensation.Thedevicereceives5-V(4.5Vto5.5
•NegativeOvercurrentLimitV)supplyfromanotherregulatorsuchasthe
TPS51120orTPS51020intheNBPCsystem.The•IntegratedBoostDiodeconversioninputcanbeeitherVBATor5-Vrail,•IntegratedOVP/UVPandThermalShutdownrangingfrom1.8Vto28V,andtheoutputvoltage
•Power-GoodSignalrangeisfrom0.75Vto5.5V.
•Internal1.2-msVoltageSoftstartTheTPS51117isavailableinthe14-pinTSSOP
•OutputDischarge(Softstop)packageandisspecifiedfrom–40°Cto85°C.
•NotebookComputers
•I/OSupplies
•SystemPowerSupplies
Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsofTexas
Instrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
D-CAPisatrademarkofTexasInstruments.
PRODUCTIONDATAinformationiscurrentasofpublicationdate.Copyright©2005,TexasInstrumentsIncorporatedProductsconformtospecificationsperthetermsoftheTexasInstrumentsstandardwarranty.Productionprocessingdoesnotnecessarilyincludetestingofallparameters.元器件交易网www.cecb2b.comwww.ti.com
ABSOLUTEMAXIMUMRATINGS(1)
DISSIPATIONRATINGS
RECOMMENDEDOPERATINGCONDITIONSTPS51117
SLVS631–DECEMBER2005
ORDERINGINFORMATION(1)(2)
MINIMUMORDERINGPARTOUTPUTTAPACKAGEPINSORDERECOPLANNUMBERSUPPLYQUANTITY
TPS51117PWTube90PLASTICGreen–40°Cto85°C14TSSOP(PW)(RoHS&noSb/Br)TPS51117PWRTape-and-Reel2000
(1)AllpackagingoptionshaveCuNIPDAUlead/ballfinish.
(2)Forthemostcurrentpackageandorderinginformation,seethePackageOptionAddendumattheendofthisdocument,orseetheTI
websiteatwww.ti.com.
VALUEUNIT
VBST–0.3to36
VBST(withrespecttoLL)–0.3to6
InputvoltagerangeEN_PSV,TRIP,V5DRV,V5FILT–0.3to6V
VOUT–0.3to6
TON–0.3to6
DRVH–1to36
DRVH(withrespecttoLL)–0.3to6
OutputvoltagerangeLL–1to30V
PGOOD,DRVL–0.3to6
PGND–0.3to0.3
TAOperatingfree-airtemperature–40to85°C
TstgStoragetemperaturerange–55to150°C
TJJunctiontemperaturerange–40to125°C
Leadtemperature1,6mm(1/16inch)fromcasefor10seconds260°C
(1)Stressesbeyondthoselistedunderabsolutemaximumratingsmaycausepermanentdamagetothedevice.Thesearestressratings
onlyandfunctionaloperationofthedeviceattheseoranyotherconditionsbeyondthoseindicatedunderrecommendedoperating
conditionsisnotimplied.Exposuretoabsolute-maximum-ratedconditionsforextendedperiodsmayaffectdevicereliability.
Ta<25°CDERATINGFACTORTA=85°CPACKAGEPOWERRATINGABOVETA=25°CPOWERRATING
14pinTSSOP750mW7.5mW/°C300mW
overoperatingfree-airtemperaturerange(unlessotherwisenoted)
MINMAXUNIT
Supplyinputvoltagerange4.55.5V
VBST4.534
VBST(withrespecttoLL)4.55.5
InputvoltagerangeEN_PSV,TRIP,V5DRV,V5FILT–0.15.5V
VOUT–0.15.5
TON–0.15.5
DRVH–0.834
DRVH(withrespecttoLL)–0.15.5
OutputvoltagerangeLL–0.828V
PGOOD,DRVL–0.15.5
PGND–0.10.1
Operatingfree-airtemperature,TA–4085°C
2元器件交易网www.cecb2b.comwww.ti.com
ELECTRICALCHARACTERISTICSTPS51117
SLVS631–DECEMBER2005
overoperatingfree-airtemperaturerange(unlessotherwisenoted)
PARAMETERTESTCONDITIONSMINTYPMAXUNIT
SUPPLYCURRENT
V5FILT+V5DRVcurrent,PWM,EN_PSV=float,VFBIV5FILTPWMSupplycurrent400750µA=0.77V,LL=–0.1V
V5FILT+V5DRVcurrent,auto-skip,EN_PSV=5V,IV5FILTSKIPSupplycurrent250470µAVFB=0.77V,LL=0.5V
IV5DRVSDNV5DRVshutdowncurrentV5DRVcurrent,EN_PSV=0V01µA
IV5FILTSDNV5FILTshutdowncurrentV5FILTcurrent,EN_PSV=0V4.57.5µA
VOUTANDVFBVOLTAGES
VOUTOutputvoltageAdjustableoutputrange0.755.5V
VVFBVFBregulationvoltage750mV
TA=25°C,bandgapinitialaccuracy–0.9%0.9%VFBregulationvoltageVVFB_TOLTA=0°Cto85°C–1.3%1.3%toleranceTA=-40°Cto85°C–1.6%1.6%
IVFBVFBinputcurrentVFB=0.75V,absolutevalue0.020.1µA
RDischgVOUTdischargeresistanceEN_PSV=0V,VOUT=0.5V2032Ω
ON-TIMETIMERANDINTERNALSOFTSTART
TONNNominalontimeVLL=12V,VOUT=2.5V,RTON=250kΩ750ns
TONFFastontimeVLL=12V,VOUT=2.5V,RTON=100kΩ264330396ns
