6,4 mm x 9,7 mm
typical 尺寸
www.ti.com
FEATURESDESCRIPTION
应用程序
SIMPLIFIEDSCHEMATIC
PVIN Ph值
引导
PGND
vsense
输出
AGND
VBIAS
Input1
TPS54974
简化 schematic
比较
补偿
网络
VIN
2.5 v 或 3.3 v
3.3 v
50
55
60
65
70
75
80
85
90
95
100
0 1 2 3 4 5 6 7 8 9 10
我
o
- 输出 电流 - 一个
效率 - %
效率
vs
输出电流
VIN= 3.3 v,
pvin = 2.5 v,
v
o
= 1.8 v,
f
s
= 700 khz
Input2
TPS54974
SLVS458B–JANUARY2003–REVISEDFEBRUARY2005
dualinputbus(2.5v,3.3v)9-aoutputsynchronousbuck
pwmswitcherwithintegratedfets(swift™)
•
LowVoltageSeparatePowerBus
asamemberoftheswift™familyofdc/dcregu-
翻译人员,thetps54974low-inputvoltage,高输出
•
15-m
Ω
MOSFETSwitchesforHighEfficiency
currentsynchronousbuckPWMconverterintegrates
at9-acontinuousoutput
allrequiredactivecomponents.includedonthe
•
AdjustableOutputVoltage
substratewiththelistedfeaturesareatrue,
•
ExternallyCompensatedWith1%Internal
高性能,voltageerroramplifierthatenables
ReferenceAccuracy
maximumperformanceundertransientconditions
andflexibilityinchoosingtheoutputfilterLandC
•
FastTransientResponse
组件;anundervoltage-lockoutcircuittopre-
•
widepwmfrequency:adjustable280khzto
ventstart-upuntilthevininputvoltagereaches3v;
700kHz
aninternallyandexternallysetslow-startcircuitto
•
LoadProtectedbyPeakCurrentLimitand
limitin-rushcurrents;andapower-goodoutputuseful
ThermalShutdown
forprocessor/logicreset,faultsignaling,andsupply
测序.
•
IntegratedSolutionReducesBoardAreaand
TotalCost
TheTPS54974isavailableinathermallyenhanced
28-pintssop(pwp)powerpad™package,哪个
eliminatesbulkyheatsinks.
•
低电压,高-densitysystems
withpowerdistributedat2.5v,
3.3vavailable
•
点-的-loadregulationfor
高性能
dsps,fpgas,asics,和
微处理器
•
宽带,联网,andoptical
CommunicationsInfrastructure
•
portablecomputing/notebookpcs
pleasebeawarethatanimportantnoticeconcerningavailability,标准保修,anduseincriticalapplicationsoftexas
instrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
swift,powerpadaretrademarksoftexasinstruments.
productiondatainformationiscurrentasofpublicationdate.
copyright©2003–2005,texasinstrumentsincorporated
ProductsconformtospecificationsperthetermsoftheTexas
instrumentsstandardwarranty.productionprocessingdoesnot
必要包括测试所有参数.
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