www.德州仪器.com
FEATURESDESCRIPTION
产品
75 k
Ω
9
10
1
1
12
PGOOD1
EN1
PGOOD2
EN2
TPS51
124RGE
(qfn24)
13
14
15
16
VBST1
DRVL1
LL1
DRVH1
VBST2
DR
VH2
LL2
DR
VL2
17
8
7
6
5
4
3
2
1
18
19
20
21
22
23
24
VO1
1.05 v/10
一个
Q2
IRF81
13
L1
Q1
IRF7821
VO2
1.5 v/10
一个
Q4
IRF81
13
L2
Q3
IRF7821
输入 v
oltage
3 v 至 28 v
PowerP
AD
T
M
C7
R6
C3
C1
C6
C4
R3
6.8
C8
R7
R1
R2
75
R5
R4
V5IN
4.5 v 至 5.5 v
VO2
VO1
VFB2
TONSEL
地
VFB1
PGND2
TRIP2
V5FILT
V5IN
TRIP1
PGND1
电源
Good2
EN2
C5
C2
电源
Good1
EN1
SGND
PGND
PGND
SGND
C9
SGND
PGND
PGND
73.2 k
Ω
k
Ω
28.7 k
Ω
22 µf
2 x 330 µf
1 µh
10 µf
0.1 µf
4.7
μ
F
6.8 k
Ω
1
μ
F
3.3
Ω
k
Ω
0.1 µf
10 µf
1 µh
2 x 330 µf
TPS51124
SLVS616A–NOVEMBER2005–REVISEDNOVEMBER2005
dualsynchronousstep-downcontrollerfor
LOWVOLTAGEPOWERRAILS
•
highefficiency,低-powerconsumption,
thetps51124isadual,adaptiveon-安排时间-cap™
shutdownsto<1
µ
一个
modesynchronousbuckcontroller.thepartenables
systemdesignerstocosteffectivelycompletethe
•
fixedfrequencyemulatedon-timecontrol,
suiteofnotebookpowerbusregulatorswiththe
FrequencySelectableFromThreeOptions
absolutelowestexternalcomponentcountandlowest
•
d-cap™modeenablesfasttransient
standbyconsumption.thefixedfrequencyemulated
回馈
adaptiveon-timecontrolsupportsseamlessoperation
•
自动-skipmode
betweenPWMmodeatheavyloadconditionand
reducedfrequencyoperationatlightloadforhigh
•
LessThan1%InitialReferenceAccuracy
efficiencydowntomilliampererange.themain
•
LowOutputRipple
controlloopforthetps51124usesthed-capmode
•
wideinputvoltagerange:3vto28v
thatoptimizedforlowESRoutputcapacitorssuchas
poscaporsp-cappromisesfasttransient
•
outputvoltagerange:0.76vto5.5v
responsewithnoexternalcompensation.simpleand
•
低-sider
ds(在)
丧失-lesscurrentsensing
separatepowergoodsignalsforeachchannelallow
•
AdaptiveGateDriversWithIntegratedBoost
flexibilityofpowersequencing.thepartprovidesa
二极管
convenientandefficientoperationwithsupplyinput
电压(v5in,v5filt)rangingfrom4.5vto5.5v,
•
internal1.2-msvoltage-servosoftstart
conversionvoltages(drainvoltageforthe
•
电源-goodsignalsforeachchannelwith
synchronoushigh-sidemosfet)from3vto28v
DelayTimer
andoutputvoltagesfrom0.76vto5.5v.
•
outputdischargeduringdisable,故障
thetps51124isavailablein24-pinqfnpackage
specifiedfrom–40
°
Cto85
°
Cambienttemperature
范围.
•
notebooki/oandlowvoltagesystembus
pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsoftexas
instrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
d-cap,powerpadaretrademarksoftexasinstruments.
productiondatainformationiscurrentasofpublicationdate.
copyright©2005,texasinstrumentsincorporated
ProductsconformtospecificationsperthetermsoftheTexas
instrumentsstandardwarranty.productionprocessingdoesnot
necessarilyincludetestingofallparameters.
: 点此下载
