(3,25 mm x 3,25 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
47
µ
F
LBO
PGND
LBI
PS
EN
地
TPS61020
V
O
3.3 v 向上 至
200 毫安
低 电池
输出
R3
R4
R5
0.9-v 至
6.5-v 输入
tps61020,tps61024
tps61025,tps61027
SLVS451A–SEPTEMBER2003–REVISEDAPRIL2004
96%efficientsynchronousboostconverterwith1.5-aswitch
•
96%EfficientSynchronousBoostConverter
TheTPS6102xdevicesprovideapowersupply
solutionforproductspoweredbyeitheraone-cell,
–200-maoutputcurrentfrom0.9-vinput
二-cell,orthree-cellalkaline,nicdornimh,或者
–500-maoutputcurrentfrom1.8-vinput
一个-cellli-ionorli-polymerbattery.outputcurrents
•
outputvoltageremainsregulatedwhenin-
cangoashighas200mawhileusingasingle-cell
putVoltageExceedsNominalOutputVoltage
alkaline,anddischargeitdownto0.9v.itcanalso
beusedforgenerating5vat500mafroma3.3-v
•
devicequiescentcurrent:25-µa(典型值)
railorali-ionbattery.theboostconverterisbased
•
inputvoltagerange:0.9-vto6.5-v
onafixedfrequency,脉冲波-宽度-调制(pwm)
•
FixedandAdjustableOutputVoltageOptions
controllerusingasynchronousrectifiertoobtain
upto5.5-v
maximumefficiency.atlowloadcurrentsthecon-
verterentersthePowerSavemodetomaintaina
•
PowerSaveModeforImprovedEfficiencyat
highefficiencyoverawideloadcurrentrange.这
LowOutputPower
powersavemodecanbedisabled,forcingthe
•
LowBatteryComparator
convertertooperateatafixedswitchingfrequency.
•
lowemi-转换器(integratedantiringing
Themaximumpeakcurrentintheboostswitchis
转变)
limitedtoavalueof1500ma.
•
LoadDisconnectDuringShutdown
TheTPS6102xdeviceskeeptheoutputvoltage
•
在-temperatureprotection
regulatedevenwhentheinputvoltageexceedsthe
nominaloutputvoltage.theoutputvoltagecanbe
•
small3mmx3mmqfn-10package
programmedbyanexternalresistordivider,oris
fixedinternallyonthechip.theconvertercanbe
disabledtominimizebatterydrain.duringshutdown,
•
allone-cell,二-cellandthree-cellalkaline,
theloadiscompletelydisconnectedfromthebattery.
nicdornimhorsingle-celllibattery
alow-emimodeisimplementedtoreduceringing
PoweredProducts
和,ineffect,lowerradiatedelectromagneticenergy
•
PortableAudioPlayers
whentheconverterentersthediscontinuousconduc-
tionmode.thedeviceispackagedina10-pinqfn
•
PDAs
PowerPAD™packagemeasuring3mmx3mm
•
CellularPhones
(drc).
•
PersonalMedicalProducts
•
CameraWhiteLEDFlashLight
pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsoftexas
instrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
powerpadisatrademarkoftexasinstruments.
productiondatainformationiscurrentasofpublicationdate.
copyright©2003–2004,texasinstrumentsincorporated
ProductsconformtospecificationsperthetermsoftheTexas
instrumentsstandardwarranty.productionprocessingdoesnot
necessarilyincludetestingofallparameters.
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