www.ti.com
FEATURESDESCRIPTION
应用程序
TPS65021
SLVS613A–OCTOBER2005–REVISEDMARCH2006
powermanagementicforli-ionpoweredsystems
•
1.2a,97%efficientstep-downconverterfor
TheTPS65021isanintegratedPowerManagement
systemvoltage(vdcdc1)
icforapplicationspoweredbyoneli-ionor
李-polymercell,andwhichrequiremultiplepower
•
1a,upto95%efficientstep-下变频器
铁轨.thetps65021providesthreehighlyefficient,
formemoryvoltage(vdcdc2)
步骤-downconverterstargetedatprovidingthecore
•
900ma,90%efficientstep-下变频器
电压,外围设备,我/oandmemoryrailsina
forprocessorcore(vdcdc3)
processorbasedsystem.allthreestep-向下
•
30maldo/switchforrealtimeclock
convertersenteralow-powermodeatlightloadfor
maximumefficiencyacrossthewidestpossiblerange
(vrtc)
ofloadcurrents.thetps65021alsointegratestwo
•
2
×
200mageneral-purposeldo
概述-purpose200maldovoltageregulators,
•
DynamicVoltageManagementforProcessor
whichareenabledwithanexternalinputpin.每个
核心
LDOoperateswithaninputvoltagerangebetween
1.5vand6.5v,allowingthemtobesuppliedfrom
•
PreselectableLDOVoltageUsingTwoDigital
oneofthestep-downconvertersordirectlyfromthe
InputPins
蓄电池.thedefaultoutputvoltageoftheldoscan
•
ExternallyAdjustableResetDelayTime
bedigitallysetto4differentvoltagecombinations
•
BatteryBackupFunctionality
usingthedefldo1anddefldo2pins.theserial
interfacecanbeusedfordynamicvoltagescaling,
•
SeparateEnablePinsforInductiveConverters
maskinginterrupts,orfordis/enablingandsettingthe
•
我
2
C™CompatibleSerialInterface
ldooutputvoltages.theinterfaceiscompatiblewith
•
85-
µ
AQuiescentCurrent
thefast/standardmodei
2
cspecification,允许
transfersatupto400khz.thetps65021is
•
LowRipplePFMMode
availableina40-管脚(rha)qfnpackage,和
•
ThermalShutdownProtection
operatesoverafree-airtemperatureof-40
°
Cto
•
40-pin6mmx6mmqfnpackage
85
°
c.
•
PDA
•
细胞/smartphone
•
InternetAudioPlayer
•
DigitalStillCamera
•
DigitalRadioPlayer
•
SplitSupplyTMS320™DSPFamilyand
µ
p
解决方案:
omap™1610,omap1710,omap330,xscale
bulverde,samsungarm-basedprocessors,
等
•
英特尔
®
pxa270,等
pleasebeawarethatanimportantnoticeconcerningavailability,标准保修,anduseincriticalapplicationsoftexas
instrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
tms320,omap,powerpadaretrademarksoftexasinstruments.
intelisaregisteredtrademarkofintelcorporation.
i2cisatrademarkofphilipselectronics.
productiondatainformationiscurrentasofpublicationdate.
copyright©2005–2006,texasinstrumentsincorporated
ProductsconformtospecificationsperthetermsoftheTexas
instrumentsstandardwarranty.productionprocessingdoesnot
必要包括测试所有参数.
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