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产品
TYPICALAPPLICATION
同步
地
PGND
SW
V
O
= 3.3 v
6.8 H
C = 22 F
6.3 v
O
VIN
LBI
C = 10 F
25 v
I
1 F
V = 3.8 v 至 17 v
I
VIN
EN
VINA
PGND
地
PwPD
AGND
TPS62111
SW
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
I - 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-downconverter
•
高-efficiencysynchronousstep-向下
thetps6211xdevicesareafamilyoflow-噪音
ConverterWithupto95%Efficiency
synchronousstep-downdc-dcconvertersthatare
ideallysuitedforsystemspoweredfroma2-cellli-ion
•
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-节省,
脉冲波-frequencymodulation(pfm)modeatlightload
•
upto1.5-aoutputcurrent
电流.operatingfrequencyistypically1mhz,
•
HighEfficiencyOveraWideLoadCurrent
allowingtheuseofsmallinductorandcapacitor
rangeduetopfm/pwmoperationmode
值.thedevicecanbesynchronizedtoanexter-
•
100%MaximumDutyCycleforLowest
nalclocksignalintherangeof0.8mhzto1.4mhz.
落后
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.
•
要点-的-loadregulationfrom12-vbus
•
organizers,pdas,andhandheldpcs
•
HandheldScanners
pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsoftexas
instrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
powerpadisatrademarkoftexasinstruments.
productiondatainformationiscurrentasofpublicationdate.
copyright©2005,texasinstrumentsincorporated
ProductsconformtospecificationsperthetermsoftheTexas
instrumentsstandardwarranty.productionprocessingdoesnot
necessarilyincludetestingofallparameters.
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