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FEATURESDESCRIPTION
应用程序
1
2
3
4
20
19
18
17
VBST
DRVH
ll
DRVL
VLDOIN
VTT
VTTGND
VTTSNS
TPS51116PWP
5
6
7
8
地
模式
比较
9
10 VDDQSET
VTTREF
VDDQSNS
16
15
14
13
PGND
cs
V5IN
PGOOD
12
11
S5
S3
C1
陶瓷
R1
R2
S5
S3
5v_入点
PGOOD
地
地
C5
陶瓷
2
×
10
µ
f
C8
SP−CAP
2
×
150
µ
f
C2
陶瓷
4.7
µ
f
L1
1
µ
h
C4
陶瓷
0.033
µ
f
C3
陶瓷
2
×
10
µ
f
UDG−04058
典型应用程序操作
(ddr2)
0.1
µ
f
VTT
0.9 v
2 一个
v
入点
VDDQ
1.8 v
10 一个
VREF
0.9 v
10 ma
TPS51116
SLUS609A–MAY2004–REVISEDJUNE2004
COMPLETEDDRANDDDR2MEMORYPOWERSOLUTION
synchronousbuckcontroller,3-aldo,bufferedreference
•
synchronousbuckcontroller(vddq)
TheTPS51116providesacompletepowersupplyfor
bothddr/sstl-2andddr2/sstl-18memorysys-
–wide-inputvoltagerange:3.0-vto28-v
临时.itintegratesasynchronousbuckcontrollerwith
–d–cap™modewith100-nsloadstepre-
a3-asink/sourcetrackinglinearregulatorand
响应
bufferedlownoisereference.thetps51116offers
–CurrentModeOptionSupportsCeramic
thelowesttotalsolutioncostinsystemswherespace
输出电容器
isatapremium.thetps51116synchronouscontrol-
lerrunsfixed400khzpseudo-constantfrequency
–supportssoft-offins4/s5states
pwmwithanadaptiveon-timecontrolthatcanbe
–CurrentSensingfromR
ds(开启)
orResistor
configuredind-cap™modeforeaseofuseand
–2.5-v(ddr),1.8-v(ddr2)oradjustable
fastesttransientresponseorincurrentmodeto
输出(1.5-vto3.0-v)
supportceramicoutputcapacitors.the3-一个
水槽/sourceldomaintainsfasttransientresponse
–equippedwithpowergood,overvoltagepro-
onlyrequiring20-µf(2
×
10µf)ofceramicoutput
tectionandUndervoltageProtection
电容.inaddition,theldosupplyinputis
•
3-aldo(vtt),bufferedreference(vref)
availableexternallytosignificantlyreducethetotal
–CapabletoSinkandSource3A
powerlosses.thetps51116supportsallofthe
sleepstatecontrolsplacingvttathigh-zins3
–LDOInputAvailabletoOptimizePower
(suspendtoram)anddischargingvddq,vttand
损失
vttref(软-关)ins4/s5(suspendtodisk).这
–requiresonly20-µfceramicoutputca-
TPS51116hasalloftheprotectionfeaturesincluding
起搏器
thermalshutdownandisina20-pinhtssop
powerpad™package.
–bufferedlownoise10-maoutput
–Accuracy
±
20mVforbothVREFandVTT
–supportshigh-zins3andsoft-offins4/s5
•
ddr/ddr2memorypowersupplies
–ThermalShutdown
•
sstl-2sstl-18andhstltermination
pleasebeawarethatanimportantnoticeconcerningavailability,标准保修,anduseincriticalapplicationsoftexas
instrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
productiondatainformationiscurrentasofpublicationdate.
copyright©2004,texasinstrumentsincorporated
ProductsconformtospecificationsperthetermsoftheTexas
instrumentsstandardwarranty.productionprocessingdoesnot
必要包括测试所有参数.
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