(3,25 mm x 3,25 mm)
www.ti.com
FEATURESDESCRIPTION
应用程序
软件
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 ma
低 蓄电池
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
解决方案productspoweredbyatheraone-cell,
–200-maoutputcurrentfrom0.9-vinput
双电池,或三细胞碱性,nicdornimh,或
–500-maoutputcurrentfrom1.8-vinput
一个-cellli-ionorli-polymerbattery.outputcurrents
•
outputvoltageremainsregulatedwhenin-
cangoashighas200mawhileusingasingle-细胞
putVoltageExceedsNominalOutputVoltage
碱性,anddischargeitdownto0.9v.itcanalso
beusedforgenerating5vat500mafroma3.3-v
•
devicequiescentcurrent:25-µa(典型值)
railorali-ionbattery.theboostconverterisbased
•
inputvoltagerange:0.9-vto6.5-v
onafixedfrequency,脉冲-宽度-调制(pwm)
•
FixedandAdjustableOutputVoltageOptions
控制器使用异步整流器获取
upto5.5-v
最大效率.atlowloadcurrentsthecon-
verterentersthePowerSavemodetomaintaina
•
PowerSaveModeforImprovedEfficiencyat
highefficiencyoverawideloadcurrentrange.这
LowOutputPower
powersavemodecanbedisabled,forcingthe
•
LowBatteryComparator
convertertooperateatafixedswitchingfrequency.
•
lowemi-变频器(integratedantiringing
Themaximumpeakcurrentintheboostswitchis
开关)
limitedtoavalueof1500ma.
•
LoadDisconnectDuringShutdown
TheTPS6102xdeviceskeeptheoutputvoltage
•
结束-temperatureprotection
regulatedevenwhentheinputvoltageexceedsthe
nominaloutputvoltage.theoutputvoltagecanbe
•
small3mmx3mmqfn-10package
programmedbyanexternalresistordivider,oris
fixedinternallyonthechip.theconvertercanbe
disabledtominimizebatterydrain.duringshutdown,
•
allone-细胞,两个-cellandthree-cellalkaline,
theloadiscompletelydisconnectedfromthebattery.
nicdornimhorsingle-celllibattery
alow-emimodeisimplementedtoreduceringing
PoweredProducts
和,ineffect,lowerradiatedelectromagneticenergy
•
PortableAudioPlayers
whentheconverterentersthediscontinuousconduc-
tionmode.thedeviceispackagedina10-pinqfn
•
PDAs
PowerPAD™packagemeasuring3mmx3mm
•
CellularPhones
(drc).
•
PersonalMedicalProducts
•
CameraWhiteLEDFlashLight
pleasebeawarethatanimportantnoticeconcerningavailability,标准保修,anduseincriticalapplicationsoftexas
instrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
powerpadisatrademarkoftexasinstruments.
productiondatainformationiscurrentasofpublicationdate.
copyright©2003–2004,texasinstrumentsincorporated
ProductsconformtospecificationsperthetermsoftheTexas
instrumentsstandardwarranty.productionprocessingdoesnot
必要包括测试所有参数.
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