真实的 大小
(4,15 mm x 4,15 mm)
www.德州仪器.com
FEATURESDESCRIPTION
产品
SW
C1
10
µ
F
L1
6.8
µ
H
R1
R2
VBAT
VOUT
FB
C2
2.2
µ
F
C3
100
µ
F
LBO
PGND
LBI
同步
EN
地
TPS6109x
e.g. 5 v 向上 至
500 毫安
低 电池
输出
R3
R4
R5
1.8 v 至 5 v
输入
TPS61090
tps61091,tps61092
SLVS484A–JUNE2003–REVISEDAPRIL2004
SYNCHRONOUSBOOSTCONVERTER
WITH2ASWITCH
•
同步的(96%efficient)boostconverter
TheTPS6109xdevicesprovideapowersupply
with500-maoutputcurrentfrom1.8-vinput
solutionforproductspoweredbyeitheraone-cell
li-ionorli-polymer,oratwo-cellalkaline,nicdor
•
availableina16-pinqfn4x4package
NiMHbatteryandrequiredsupplycurrentsuptoor
•
devicequiescentcurrent:20-µa(典型值)
higherthan1a.theconvertergeneratesastable
•
inputvoltagerange:1.8-vto5.5-v
outputvoltagethatiseitheradjustedbyanexternal
resistordividerorfixedinternallyonthechip.它
•
adjustableoutputvoltageupto5.5-vfixed
provideshighefficientpowerconversionandis
OutputVoltageOptions
capableofdeliveringoutputcurrentsupto0.5aat5
•
PowerSaveModeforImprovedEfficiencyat
vatasupplyvoltagedownto1.8v.theim-
LowOutputPower
plementedboostconverterisbasedonafixed
•
LowBatteryComparator
频率,脉冲波-宽度-调制(pwm)控制
usingasynchronousrectifiertoobtainmaximum
•
lowemi-转换器(integratedantiringing
效率.boostswitchandrectifierswitcharecon-
转变)
nectedinternallytoprovidethelowestleakageinduct-
•
LoadDisconnectDuringShutdown
anceandbestemibehaviorpossible.themaximum
•
在-temperatureprotection
peakcurrentintheboostswitchislimitedtoavalue
of2500ma.
Theconvertercanbedisabledtominimizebattery
•
allsinglecellliordualcellbattery,orusb
流.duringshutdown,theloadiscompletelydis-
poweredoperatedproductsasmp-3player,
connectedfromthebattery.alow-emimodeis
pdas,andotherportableequipment
implementedtoreduceringingand,ineffect,更小的
radiatedelectromagneticenergywhentheconverter
entersthediscontinuousconductionmode.
theoutputvoltagecanbeprogrammedbyanexter-
nalresistordividerorisfixedinternallyonthechip.
thedeviceispackagedina16-pinqfn4x4mm
(16rsa)包装.
pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsoftexas
instrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
productiondatainformationiscurrentasofpublicationdate.
copyright©2003–2004,texasinstrumentsincorporated
ProductsconformtospecificationsperthetermsoftheTexas
instrumentsstandardwarranty.productionprocessingdoesnot
necessarilyincludetestingofallparameters.
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