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应用程序
TYPICALAPPLICATION
同步
地
PGND
软件
v
o
= 3.3 v
6.8 h
c = 22 f
6.3 v
o
VIN
LBI
c = 10 f
25 v
我
1 f
v = 3.8 v 至 17 v
我
VIN
en
VINA
PGND
地
PwPD
AGND
TPS62111
软件
LBO
PG
1 m
fb
TPS62111
效率 vs 输出 电流
100
0
90
70
40
20
80
50
60
30
10
0.0001
0.001
0.01
0.1
10
1
我 - 输出 电流- 一个
o
效率 - %
5 v
4.2 v
12 v
8.4 v
v = 3.3 v
t
pfm 模式
o
一个
= 25 c
o
TPS62110
TPS62111
TPS62112
SLVS585–JULY2005
17-v,1.5-一个,synchronousstep-下变频器
•
高-efficiencysynchronousstep-向下
thetps6211xdevicesareafamilyoflow-噪声
ConverterWithupto95%Efficiency
synchronousstep-downdc-dcconvertersthatare
ideallysuitedforsystemspoweredfroma2-cellli-离子
•
3.1-vto17-voperatinginputvoltagerange
batteryorfroma12-vor15-vrail.
•
AdjustableOutputVoltageRangeFrom
TheTPS6211xisasynchronousPWMconverterwith
1.2vto16v
integrated–andp-channelpowermosfetswitches.
•
FixedOutputVoltageOptionsAvailablein
synchronousrectificationisusedtoincreaseef-
3.3vand5v
ficiencyandtoreduceexternalcomponentcount.至
•
SynchronizabletoExternalClockSignalupto
achievehighestefficiencyoverawideloadcurrent
1.4mhz
范围,theconverterentersapower-正在保存,
脉冲-频率调制(pfm)modeatlightload
•
upto1.5-aoutputcurrent
电流.operatingfrequencyistypically1mhz,
•
HighEfficiencyOveraWideLoadCurrent
allowingtheuseofsmallinductorandcapacitor
rangeduetopfm/pwmoperationmode
数值.thedevicecanbesynchronizedtoanexter-
•
100%MaximumDutyCycleforLowest
nalclocksignalintherangeof0.8mhzto1.4mhz.
辍学
forlownoiseoperation,theconvertercanbe
operatedinpwm-onlymode.intheshutdownmode,
•
20-µaquiescentcurrent(典型)
thecurrentconsumptionisreducedtolessthan2µa.
•
OvertemperatureandOvercurrentProtected
thetps6211xisavailableinthe16-管脚(rsa)qfn
•
availablein16-pinqfnpackage
包装,andoperatesoverafree-airtemperature
rangeof–40
°
Cto85
°
c.
•
点-的-loadregulationfrom12-vbus
•
组织者,pdas,andhandheldpcs
•
HandheldScanners
pleasebeawarethatanimportantnoticeconcerningavailability,标准保修,anduseincriticalapplicationsoftexas
instrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
powerpadisatrademarkoftexasinstruments.
productiondatainformationiscurrentasofpublicationdate.
copyright©2005,texasinstrumentsincorporated
ProductsconformtospecificationsperthetermsoftheTexas
instrumentsstandardwarranty.productionprocessingdoesnot
必要包括测试所有参数.
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