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3
2
4
5
dbv pACKAGE
(t运算 视图)
1
SW
地
FB
V
在
EN
TYPICALAPPLICATION
V
在
SW
FB
EN
地
L1
10
µ
H
D1
R1
R2
C
FF
C
O
1
µ
F
V
输出
V
在
至 28 v
V
在
1.8 v 至 6.0 v
C
在
4.7
µ
F
70
72
74
76
78
80
82
84
86
88
90
0.10 1 10 100
V
I
= 5 v
V
I
= 3.6 v
V
I
= 2.4 v
效率 - %
效率
vs
输出电流
I
O
- 输出 电流 - 毫安
5
4
2
3
1
V
O
= 18 v
TPS61040
TPS61041
SLVS413B–OCTOBER2002–REVISEDMAY2004
lowpowerdc/dcboostconverterinsot-23package
•
1.8vto6vinputvoltagerange
thetps61040/41isahigh-frequencyboostcon-
verterdedicatedforsmalltomediumLCDbiassupply
•
AdjustableOutputVoltageRangeupto28V
andwhiteledbacklightsupplies.thedeviceisideal
•
400ma(tps61040)and250ma(tps61041)
togenerateoutputvoltagesupto28Vfromadual
InternalSwitchCurrent
cellnimh/nicdorasinglecellli-ionbattery.这
•
Upto1MHzSwitchingFrequency
partcanalsobeusedtogeneratestandard3.3v/5v
to12vpowerconversions.
•
28µATypicalNoLoadQuiescentCurrent
•
1µATypicalShutdownCurrent
thetps61040/41operateswithaswitchingfre-
quencyupto1mhz.thisallowstheuseofsmall
•
InternalSoftstart
externalcomponentsusingceramicaswellastanta-
•
availableinatiny5-pinsot23package
lumoutputcapacitors.togetherwiththetinysot23
包装,thetps61040/41givesaverysmalloverall
solutionsize.thetps61040hasaninternal400ma
•
LCDBiasSupply
switchcurrentlimit,whilethetps61041hasa250
maswitchcurrentlimit,offeringloweroutputvoltage
•
白-ledsupplyforlcdbacklights
rippleandallowstheuseofasmallerformfactor
•
DigitalStillCamera
inductorforlowerpowerapplications.thelowquiesc-
•
pdas,organizersandhandheldpcs
entcurrent(typically28µa)togetherwithan
•
CellularPhones
optimizedcontrolscheme,allowsdeviceoperationat
•
InternetAudioPlayer
veryhighefficienciesovertheentireloadcurrent
范围.
•
standard3.3v/5vto12vconversion
pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsoftexas
instrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
productiondatainformationiscurrentasofpublicationdate.
copyright©2002–2004,texasinstrumentsincorporated
ProductsconformtospecificationsperthetermsoftheTexas
instrumentsstandardwarranty.productionprocessingdoesnot
necessarilyincludetestingofallparameters.
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