参数资料
型号: LTC4266CGW#TRPBF
厂商: LINEAR TECHNOLOGY CORP
元件分类: 电源管理
英文描述: POWER SUPPLY MANAGEMENT CKT, PDSO36
封装: 0.300 INCH, LEAD FREE, PLASTIC, SSOP-36
文件页数: 27/30页
文件大小: 414K
代理商: LTC4266CGW#TRPBF
LTC4266
4266fa
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
I2CTiming
ClockFrequency
(Note7)
l
1
MHz
t1
BusFreeTime
Figure5(Notes7,9)
l
480
ns
t2
StartHoldTime
Figure5(Notes7,9)
l
240
ns
t3
SCLLowTime
Figure5(Notes7,9)
l
480
ns
t4
SCLHighTime
Figure5(Notes7,9)
l
240
ns
t5
DataHoldTime
Figure5(Notes7,9)Dataintochip
Dataoutofchip
l
60
120
ns
t6
DataSet-UpTime
Figure5(Notes7,9)
l
80
ns
t7
StartSet-UpTime
Figure5(Notes7,9)
l
240
ns
t8
StopSet-UpTime
Figure5(Notes7,9)
l
240
ns
tr
SCL,SDAINRiseTime
Figure5(Notes7,9)
l
120
ns
tf
SCL,SDAINFallTime
Figure5(Notes7,9)
l
60
ns
FaultPresenttoINTPinLow
(Notes7,9,10)
l
150
ns
StopConditiontoINTPinLow
(Notes7,9,10)
l
1.5
s
ARAtoINTPinHighTime
(Notes7,9)
l
1.5
s
SCLFalltoACKLow
(Notes7,9)
l
120
ns
Note1:StressesbeyondthoselistedunderAbsoluteMaximumRatings
maycausepermanentdamagetothedevice.ExposuretoanyAbsolute
MaximumRatingconditionforextendedperiodsmayaffectdevice
reliabilityandlifetime.
Note2:ThisICincludesovertemperatureprotectionthatisintended
toprotectthedeviceduringmomentaryoverloadconditions.Junction
temperaturewillexceed140°Cwhenovertemperatureprotectionisactive.
Continuousoperationabovethespecifiedmaximumoperatingjunction
temperaturemayimpairdevicereliability.
Note3:Allcurrentsintodevicepinsarepositive;allcurrentsoutofdevice
pinsarenegative.
Note4:TheLTC4266operateswithanegativesupplyvoltage(withrespect
toground).Toavoidconfusion,voltagesinthisdatasheetarereferredto
intermsofabsolutemagnitude.
Note5:tDISisthesameastMPDOdefinedbyIEEE802.3at.
Note6:TheLTC4266digitalinterfaceoperateswithrespecttoDGND.All
logiclevelsaremeasuredwithrespecttoDGND.
Note7:Guaranteedbydesign,notsubjecttotest.
Note8:TheIEEE802.3afspecificationallowsaPDtopresentits
MaintainPowerSignature(MPS)onanintermittentbasiswithoutbeing
disconnected.Inordertostaypowered,thePDmustpresenttheMPSfor
tMPSwithinanytMPDOtimewindow.
Note9:ValuesmeasuredatVILD(MAX)andVIHD(MIN).
Note10:IffaultconditionoccursduringanI2Ctransaction,theINTpin
willnotbepulleddownuntilastopconditionispresentontheI2Cbus.
Note11:LoadCharacteristicoftheLTC4266duringMark:
7V<(AGND–VOUTn)<10VorIOUT<50A
Note12:SeetheLTC4266SoftwareProgrammingdocumentationfor
informationonserialbususageanddeviceconfigurationandstatus
registers.
electricAl chArActeristics
Theldenotesthespecificationswhichapplyoverthefulloperating
temperaturerange,otherwisespecificationsareatTA=25°C.AGND–VEE=54V,AGND=DGND,andVDD–DGND=3.3Vunlessotherwise
noted.(Notes3,4)
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