VIN
參數(shù)資料
型號： LTC4264IDE#PBF
廠商： Linear Technology
文件頁數(shù)： 12/24頁
文件大?。?/td> 0K
描述： IC CNTRLR PD INTERFACE 12-DFN
產(chǎn)品培訓(xùn)模塊： Power over Ethernet
標(biāo)準(zhǔn)包裝： 91
控制器類型： 以太網(wǎng)供電控制器（POE）
接口： IEEE 802.3af
電流 - 電源： 3mA
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 12-WFDFN 裸露焊盤
供應(yīng)商設(shè)備封裝： 12-DFN（4x3）
包裝： 管件
LTC4264
2
4264f
PACKAGE/ORDER INFORMATION
ELECTRICAL CHARACTERISTICS
ABSOLUTE MAXIMUM RATINGS
VIN Voltage................................................. 0.3V to –90V
VOUT Voltage ......... VIN + 90V (and ≤ GND) to VIN – 0.3V
SHDN Voltage ............................ VIN + 90V to VIN – 0.3V
RCLASS, ILIM_EN Voltage ............... VIN + 7V to VIN – 0.3V
PWRGD Voltage (Note 3)
Low Impedance Source ....VOUT + 11V to VOUT – 0.3V
Current Fed ..........................................................5mA
PWRGD Voltage ......................... VIN + 80V to VIN – 0.3V
PWRGD Current.....................................................10mA
RCLASS Current.....................................................100mA
Operating Ambient Temperature Range
LTC4264C ................................................ 0°C to 70°C
LTC4264I ............................................. –40°C to 85°C
Junction Temperature ........................................... 150°C
Storage Temperature Range................... –65°C to 150°C
(Notes 1, 2)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VIN
Supply Voltage
IEEE 802.3af System
Signature Range
Classication Range
UVLO Turn-On Voltage
UVLO Turn-Off Voltage
Voltage with Respect to GND Pin
(Notes 5, 6, 7, 8)
●
–1.5
–12.5
–37.7
–29.8
–38.9
–30.6
–57
–10.1
–21
–40.2
–31.5
V
IIN_ON
IC Supply Current when On
VIN = –54V
●
3mA
IIN_CLASS
IC Supply Current During Classication
VIN = –17.5V (Note 9)
●
0.55
0.62
0.70
mA
ΔICLASS
Current Accuracy During Classication
10mA < ICLASS < 75mA, –12.5V ≤ VIN ≤ –21V
(Notes 10,11)
●
±3.5
%
tCLASSRDY
Classication Stability Time
VIN Stepped 0V to –17.5V, IIN_CLASS ≤3.5% of
Ideal, 10mA < ICLASS < 75mA (Notes 10, 11)
●
1ms
RSIGNATURE
Signature Resistance
–1.5V ≤ VIN ≤ –10.1V, IEEE 802.3af 2-Point
Measurement, SHDN Tied to VIN (Notes 6, 7)
●
23.25
26.00
k
Ω
RINVALID
Invalid Signature Resistance
–1.5V ≤ VIN ≤ –10.1V, IEEE 802.3af 2-Point
Measurement, SHDN Tied to GND (Notes 6, 7)
●
10
11.8
k
Ω
VIH_SHDN
SHDN High Level Input Voltage
With Respect to VIN, High Level = Shutdown
(Note 12)
●
357
V
VIL_SHDN
SHDN Low Level Input Voltage
With Respect to VIN
●
0.45
V
RINPUT_SHDN
SHDN Input Resistance
With Respect to VIN
●
100
k
VIH_ILIM
ILIM_EN High Level Input Voltage
With Repect to VIN, High Level Enables Current
Limit (Note 13)
●
4V
12
11
10
9
8
7
1
2
3
4
5
6
GND
NC
PWRGD
VOUT
SHDN
NC
RCLASS
ILIM_EN
VIN
TOP VIEW
13
DE12 PACKAGE
12-LEAD (4mm
× 3mm) PLASTIC DFN
TJMAX = 150°C, θJA = 43°C/W, θJC = 4.3°C/W
EXPOSED PAD (PIN 13) MUST BE SOLDERED TO
AN ELECTRICALLY ISOLATED HEAT SINK
ORDER PART NUMBER
DE PART MARKING*
LTC4264CDE
LTC4264IDE
4264
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/
Consult LTC Marketing for parts specied with wider operating temperature ranges.
*The temperature grade is identied by a label on the shipping container.
The
● denotes the specications which apply over the full operating
temperature range, otherwise specications are at TA = 25°C. (Note 4)
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