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特点
描述
应用程序
v
我
地
en
软件
fb
C1
4.7
µ
f
L1
10
µ
h
C2
10
µ
f
TPS62202
v
我
2.5 v − 6 v
v
o
1.8 v / 300 ma
1
5
2
3
4
40
45
50
55
60
65
70
75
80
85
90
95
100
0.010 0.100 1
10 100 1000
效率 − %
效率
vs
荷载 电流
我
l
−load 电流 − ma
v
o
= 1.8 v
v
我
= 2.7 v
v
我
= 3.7 v
v
我
= 5 v
tps62200,tps62201
tps62202,tps62203,tps62207
tps62204,tps62205,tps62208
SLVS417D–MARCH2002–REVISEDMAY2004
高效率,sot23
降压,直流-dcconverter
•
highefficiencysynchronousstep-向下
thetps6220xdevicesareafamilyofhigh-效率
ConverterWithupto95%Efficiency
同步步骤-向下转换side-suitedfor
•
2.5vto6.0vinputvoltagerange
portablesystemspoweredby1-cellli-ionor3-细胞
•
adjustableoutputvoltagerangefrom0.7v
nimh/nicdbatteries.thedevicesarealsosuitableto
toV
我
operatefromastandard3.3-vor5-vvoltagerail.
•
FixedOutputVoltageOptionsAvailable
withanoutputvoltagerangeof6.0vdownto0.7v
•
Upto300mAOutputCurrent
andupto300maoutputcurrent,设备是
idealtopowerlowvoltageDSPsandprocessors
•
1MHzFixedFrequencyPWMOperation
usedinpdas,pocketpcs,和智能手机.下
•
HighestEfficiencyOverWideLoadCurrent
无名电流,设备操作与固定
RangeDuetoPowerSaveMode
switchingfrequencyoftypically1mhz.atlightload
•
15-µatypicalquiescentcurrent
电流,thepartentersthepowersavemode
操作;theswitchingfrequencyisreducedandthe
•
软启动
quiescentcurrentistypicallyonly15µa;thereforeit
•
100%dutycyclelow-dropoutoperation
achievesthehighestefficiencyovertheentireload
•
dynamicoutput-voltagepositioning
currentrange.thetps6220xneedsonlythreesmall
externalcomponents.togetherwiththetinysot23
•
availableinatiny5-pinsot23package
包装,aminimumsystemsolutionsizecanbe
已实现.anadvancedfastresponsevoltagemode
controlschemeachievessuperiorlineandloadregu-
•
PDAsandPocketPC
lationwithsmallceramicinputandoutputcapacitors.
•
cellularphones,smartphones
•
LowPowerDSPSupply
•
DigitalCameras
•
PortableMediaPlayers
•
PortableEquipment
figure1.typicalapplication
(fixedoutputvoltageversion)
pleasebeawarethatanimportantnoticeconcerningavailability,标准保修,anduseincriticalapplicationsoftexas
instrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
productiondatainformationiscurrentasofpublicationdate.
copyright©2002–2004,texasinstrumentsincorporated
ProductsconformtospecificationsperthetermsoftheTexas
instrumentsstandardwarranty.productionprocessingdoesnot
必要包括测试所有参数.
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