參數(shù)資料
型號： LTC4266CUHF#PBF
廠商： LINEAR TECHNOLOGY CORP
元件分類： 電源管理
英文描述： POWER SUPPLY MANAGEMENT CKT, PQCC38
封裝： 5 X 7 MM, LEAD FREE, PLASTIC, MO-220WHKD, QFN-38
文件頁數(shù)： 5/30頁
文件大?。?/td> 414K
代理商： LTC4266CUHF#PBF
LTC4266
4266fa
pin Functions
RESET:ChipReset,ActiveLow.WhentheRESETpinis
low,theLTC4266isheldinactivewithallportsoffandall
internalregistersresettotheirpower-upstates.When
RESETispulledhigh,theLTC4266beginsnormalopera-
tion.RESETcanbeconnectedtoanexternalcapacitor
orRCnetworktoprovideapowerturn-ondelay.Internal
filteringoftheRESETpinpreventsglitcheslessthan1s
widefromresettingtheLTC4266.Internallypulledupto
VDD.
MID:MidspanModeInput.Whenhigh,theLTC4266acts
asamidspandevice.InternallypulleddowntoDGND.
INT:InterruptOutput,OpenDrain.INTwillpulllowwhen
anyoneofseveraleventsoccurintheLTC4266.Itwill
returntoahighimpedancestatewhenbits6or7areset
intheResetPBregister(1Ah).TheINTsignalcanbeused
togenerateaninterrupttothehostprocessor,eliminating
theneedforcontinuoussoftwarepolling.IndividualINT
eventscanbedisabledusingtheIntMaskregister(01h).
SeeRegisterFunctionsandApplicationsInformationfor
moreinformation.TheINTpinisonlyupdatedbetween
I2Ctransactions.
SCL:SerialClockInput.Highimpedanceclockinputfor
theI2Cserialinterfacebus.SCLmustbetiedhighifnot
used.
SDAOUT:SerialDataOutput,OpenDrainDataOutputfor
theI2CSerialInterfaceBus.TheLTC4266usestwopins
toimplementthebidirectionalSDAfunctiontosimplify
optoisolationoftheI2Cbus.Toimplementastandard
bidirectionalSDApin,tieSDAOUTandSDAINtogether.
SDAOUTshouldbegroundedorleftfloatingifnotused.
SeeApplicationsInformationformoreinformation.
SDAIN:SerialDataInput.Highimpedancedatainputfor
theI2Cserialinterfacebus.TheLTC4266usestwopins
toimplementthebidirectionalSDAfunctiontosimplify
optoisolationoftheI2Cbus.Toimplementastandard
bidirectionalSDApin,tieSDAOUTandSDAINtogether.
SDAINmustbetiedhighifnotused.SeeApplications
Informationformoreinformation.
AD3:AddressBit3.Tietheaddresspinshighorlowto
settheI2CserialaddresstowhichtheLTC4266responds.
Thisaddresswillbe010A3A2A1A0b.Internallypulledup
toVDD.
AD2:AddressBit2.SeeAD3.
AD1:AddressBit1.SeeAD3.
AD0:AddressBit0.SeeAD3.
NC,DNC:Allpinsidentifiedwith“NC”or“DNC”mustbe
leftunconnected.
DGND:DigitalGround.DGNDisthereturnfortheVDD
supply.
VDD:LogicPowerSupply.Connecttoa3.3Vpowersupply
relativetoDGND.VDDmustbebypassedtoDGNDnear
theLTC4266withatleasta0.1Fcapacitor.
SHDN1:ShutdownPort1,ActiveLow.Whenpulledlow,
SHDN1shutsdownport1,regardlessofthestateofthe
internalregisters.PullingSHDN1lowisequivalenttoset-
tingtheResetPort1bitintheResetPushbuttonregister
(1Ah).InternalfilteringoftheSHDN1pinpreventsglitches
lessthan1swidefromresetingtheport.Internallypulled
uptoVDD.
SHDN2:ShutdownPort2,ActiveLow.SeeSHDN1.
SHDN3:ShutdownPort3,ActiveLow.SeeSHDN1.
SHDN4:ShutdownPort4,ActiveLow.SeeSHDN1.
AGND:AnalogGround.AGNDisthereturnfortheVEE
supply.
SENSE4:Port4CurrentSenseInput.SENSE4monitors
theexternalMOSFETcurrentviaa0.5or0.25Ωsense
resistorbetweenSENSE4andVEE.Wheneverthevoltage
acrossthesenseresistorexceedstheovercurrentdetection
thresholdVCUT,thecurrentlimitfaulttimercountsup.If
thevoltageacrossthesenseresistorreachesthecurrent
limitthresholdVLIM,theGATE4pinvoltageisloweredto
maintainconstantcurrentintheexternalMOSFET.See
ApplicationsInformationforfurtherdetails.Iftheportis
unused,theSENSE4pinmustbetiedtoVEE.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC4266IGW#PBF 功能描述:IC CTRLR IEEE 802.3AT 36-SSOP RoHS:是 類別:集成電路 (IC) >> 接口 - 控制器 系列:- 標(biāo)準(zhǔn)包裝:2,450 系列:- 控制器類型:SPI 總線至 I²C 總線橋接 接口:I²C，串行，SPI 電源電壓:2.4 V ~ 3.6 V 電流 - 電源:11mA 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:24-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:24-HVQFN（4x4） 包裝:托盤 配用:568-3511-ND - DEMO BOARD SPI TO I2C 其它名稱:935286452157SC18IS600IBSSC18IS600IBS-ND
LTC4266IGW#TRPBF 制造商:Linear Technology 功能描述:Power Over Ethernet Controller 36-Pin SSOP W T/R 制造商:Linear Technology 功能描述:MS-Hot Swap/POE, PoE+ 25.5W Quad PSE Controller
LTC4266IUHF#PBF 制造商:Linear Technology 功能描述:POE Controller 25.5W 38-Pin QFN EP 制造商:Linear Technology 功能描述:IC POE 802.3AT QUAD PSE 38-QFN 制造商:Linear Technology 功能描述:POE CNTRL QUAD 25.5W 1MHZ 制造商:Linear Technology 功能描述:IC, POE CONTROLLER, 3.3V, QFN-38; Input Voltage:3.3V; Supply Current:-2.4mA; UVLO:25V; Digital IC Case Style:QFN; No. of Pins:38; Frequency:1MHz; Operating Temperature Min:-40C; Operating Temperature Max:85C; MSL:MSL 1 - Unlimited ;RoHS Compliant: Yes
LTC4266IUHF#TRPBF 制造商:Linear Technology 功能描述:POE Controller 25.5W 38-Pin QFN EP
LTC4267 制造商:LINER 制造商全稱:Linear Technology 功能描述:Quad IEEE 802.3at Power over Ethernet Controller
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