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应用程序
typicalapplicationcircuit(600-maoutputcurrent)
VIN
VIN
en
模式
软件
fb
PGND
PGND
软件
地
2
3
1
4 9
10
5
7
8
6
TPS62020
C1
R2
R1
C2
C3
10
µ
f
v
我
2.5 v 至 6 v
L1
10
µ
h
C4
10
µ
f
v
o
0.7 v 至 v
我
/ 600 ma
40
45
50
55
60
65
70
75
80
85
90
95
100
0 0.01 0.10 1 100010 100
效率 − %
效率
vs
荷载电流
我
l
− 荷载 电流 − ma
v
o
= 1.8 v
v
我
= 3.6 v
模式 = 高
模式 = 低
v
我
= 5 v
v
我
= 3.6 v
v
我
= 2.7 v
TPS62020
TPS62021
TPS62026
SLVS076C–JUNE2003–REVISEDDECEMBER2004
600ma/1.25mhzhigh-efficiencystep-下变频器
•
Upto95%ConversionEfficiency
TheTPS6202xisahighefficiencysynchronous
步骤-downdc-dcconverteroptimizedforbatterypow-
•
typicalquiescentcurrent:18µa
eredportableapplications.thisdeviceisidealfor
•
loadcurrent:600ma
portableapplicationspoweredbyasingleli-离子
•
operatinginputvoltagerange:2.5vto6.0v
batterycellorby3-cellnimh/nicdbatteries.withan
•
switchingfrequency:1.25mhz
outputvoltagerangefrom6.0vdownto0.7v,这
devicesupportslowvoltageDSPsandprocessorsin
•
AdjustableandFixedOutputVoltage
pdas,pocketpcs,aswellasnotebooksand
•
PowerSaveModeOperationatLightload
subnotebookcomputers.thetps6202xoperatesat
电流
afixedswitchingfrequencyof1.25mhzandenters
thepowersavemodeoperationatlightloadcurrents
•
活动-lowmodepinontps62021
tomaintainhighefficiencyovertheentireloadcurrent
•
100%DutyCycleforLowestDropout
范围.forlownoiseapplications,thedevicecanbe
•
InternalSoftstart
forcedintofixedfrequencyPWMmodebypullingthe
•
DynamicOutputVoltagePositioning
modepinhigh.thedifferencebetweenthe
TPS6202xandtheTPS62021isthelogiclevelofthe
•
ThermalShutdown
modepin.thetps62021hasanactive-lowmode
•
短-电路保护
管脚.thetps6202xsupportsupto600-maload
•
10PinMSOPPowerPad™Package
电流.
•
10PinQFN3X3mmPackage
•
pda,pocketpcandsmartphones
•
USBPoweredModems
•
CPUsandDSPs
•
PCCardsandNotebooks
•
xDSLApplications
•
standard5-vto3.3-vconversion
pleasebeawarethatanimportantnoticeconcerningavailability,标准保修,anduseincriticalapplicationsoftexas
instrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
powerpadisatrademarkoftexasinstruments.
productiondatainformationiscurrentasofpublicationdate.
copyright©2003–2004,texasinstrumentsincorporated
ProductsconformtospecificationsperthetermsoftheTexas
instrumentsstandardwarranty.productionprocessingdoesnot
必要包括测试所有参数.
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