www.ti.com
FEATURESDESCRIPTION
应用程序
v
我
地
en
软件
fb
C3
4.7 f
L1
4.7 h
C4
10 f
TPS62220
v
我
2.5 v 至 6 v
v
o
1.5 v/400 ma
R1
360 k
R2
180 k
C1
22 pf
C2
100 pf
1
2
3
5
4
40
45
50
55
60
65
70
75
80
85
90
95
100
0.01
0.1
1
10
100
1000
v
o
= 1.8 v
,
l = 4.7 h,
c
o
= 22 f
Efficency
−
%
我
l
−
荷载 电流
−
ma
v
我
= 3.7 v
t
ypical 应用程序 (adjustible 输出 电压 版本)
v
我
= 5 v
v
我
= 2.7 v
tps62220,tps62221,tps62222
tps62223,tps62224,tps62227
tps62228,tps62229
SLVS491D–SEPTEMBER2003–REVISEDMARCH2006
400-ma,1.25-mhz,高效率,步骤-downconverterinthin-sot23
•
高-efficiencysynchronousstep-向下
thetps6222xdevicesareafamilyofhigh-效率,
ConverterWithupto95%Efficiency
同步步骤-向下转换side-suitedfor
portablesystemspoweredby1-cellli-ionor3-细胞
•
2.5-vto6-vinputvoltagerange
nimh/nicdbatteries.thedevicesarealsosuitableto
•
adjustableoutputvoltagerangefrom0.7v
operatefromastandard3.3-vor5-vvoltagerail.
toV
我
withanoutputvoltagerangeof6vdownto0.7v
•
FixedOutputVoltageOptionsAvailable
andupto400-maoutputcurrent,设备是
•
upto400-maoutputcurrent
idealforpoweringthelowvoltageTMS320™DSP
•
1.25-mhzfixedfrequencypwmoperation
familyandprocessorsusedinpdas,pocketpcs,
和智能手机.undernominalloadcurrent,这
•
HighestEfficiencyOverWideLoadCurrent
devicesoperatewithafixedswitchingfrequencyof
rangeduetopower-savemode
typically1.25mhz.atlightloadcurrents,thepart
•
15-µatypicalquiescentcurrent
entersthepower-savemodeoperation;theswitching
•
软启动
frequencyisreducedandthequiescentcurrentis
typicallyonly15µa;因此,thedeviceachieves
•
100%dutycyclelow-dropoutoperation
thehighestefficiencyovertheentireloadcurrent
•
dynamicoutput-voltagepositioning
范围.thetps6222xneedsonlythreesmall
•
AvailableinTSOT23Package
externalcomponents.togetherwiththetinytsot23
包装,aminimumsystemsolutionsizecanbe
已实现.anadvancedfastresponsevoltagemode
controlschemeachievessuperiorlineandload
•
PDAsandPocketPC
regulationwithsmallceramicinputandoutput
•
cellularphones,smartphones
电容器.
•
OMAP™andLowPowerDSPSupply
•
DigitalCameras
•
PortableMediaPlayers
•
PortableEquipment
•
WLANPCCards
pleasebeawarethatanimportantnoticeconcerningavailability,标准保修,anduseincriticalapplicationsoftexas
instrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
omap,tms320aretrademarksoftexasinstruments.
productiondatainformationiscurrentasofpublicationdate.
copyright©2003–2006,texasinstrumentsincorporated
ProductsconformtospecificationsperthetermsoftheTexas
instrumentsstandardwarranty.productionprocessingdoesnot
必要包括测试所有参数.
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