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FEATURESDESCRIPTION
应用程序
v
我
地
en
软件
fb
C3
4.7
µ
f
L1
4.7
µ
h
C4
10
µ
f
TPS62220
v
我
2.5 v 至 6 v
v
o
1.5 v/400 ma
R1
360 k
Ω
R2
180 k
Ω
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
µ
h,
c
o
= 22
µ
f
v
我
= 2.7 v
v
我
= 5 v
efficency − %
我
l
− 荷载 电流 − ma
v
我
= 3.7 v
typical应用程序 (可调 输出 v旧 版本)
tps62220,tps62221,tps62222
tps62223,tps62224
tps62228,tps62229
SLVS491C–SEPTEMBER2003–REVISEDSEPTEMBER2004
400-ma,1.25-mhz,高效率,步骤-downconverterinthin-sot23
•
高-efficiencysynchronousstep-downcon-
thetps6222xdevicesareafamilyofhigh-效率,
verterWithupto95%Efficiency
同步步骤-向下转换side-suitedfor
portablesystemspoweredby1-cellli-ionor3-细胞
•
2.5-vto6.0-vinputvoltagerange
nimh/nicdbatteries.thedevicesarealsosuitableto
•
adjustableoutputvoltagerangefrom0.7v
operatefromastandard3.3-vor5-vvoltagerail.
toV
我
withanoutputvoltagerangeof6.0vdownto0.7v
•
FixedOutputVoltageOptionsAvailable
andupto400-maoutputcurrent,设备是
•
upto400-maoutputcurrent
idealtopowerlowvoltageDSPsandprocessors
•
1.25-mhzfixedfrequencypwmoperation
usedinpdas,pocketpcs,和智能手机.下
无名电流,设备操作与固定
•
HighestEfficiencyOverWideLoadCurrent
switchingfrequencyoftypically1.25mhz.atlight
rangeduetopower-savemode
负载电流,thepartentersthepower-savemode
•
15-µatypicalquiescentcurrent
操作;theswitchingfrequencyisreducedandthe
•
软启动
quiescentcurrentistypicallyonly15µa;因此,
设备实现了更高的效率
•
100%dutycyclelow-dropoutoperation
entireloadcurrentrange.thetps6222xneedsonly
•
dynamicoutput-voltagepositioning
三个外部组件.togetherwiththe
•
AvailableinTSOT23Package
tinytsot23package,aminimumsystemsolution
已实现.anadvancedfastresponse
电压解除控制方案实现超直线
和负载调节与smallceramicinputand
•
PDAsandPocketPC
输出电容器.
•
cellularphones,smartphones
•
OMAP™andLowPowerDSPSupply
•
DigitalCameras
•
PortableMediaPlayers
•
PortableEquipment
•
WLANPCCards
pleasebeawarethatanimportantnoticeconcerningavailability,标准保修,anduseincriticalapplicationsoftexas
instrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
omapisatrademarkoftexasinstruments.
productiondatainformationiscurrentasofpublicationdate.
copyright©2003–2004,texasinstrumentsincorporated
ProductsconformtospecificationsperthetermsoftheTexas
instrumentsstandardwarranty.productionprocessingdoesnot
必要包括测试所有参数.
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