Pins with Respect to VPORTN
參數(shù)資料
型號(hào)： LTC4278IDKD#PBF
廠商： Linear Technology
文件頁(yè)數(shù)： 12/42頁(yè)
文件大小： 0K
描述： IC PD IEEE 802.3AT 25.5W 32-DFN
產(chǎn)品培訓(xùn)模塊： Power over Ethernet
標(biāo)準(zhǔn)包裝： 52
控制器類型： 供電設(shè)備接口控制器（PD）
接口： IEEE 802.3af
電源電壓： 4.5 V ~ 20 V
電流 - 電源： 6.4mA
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 32-WFDFN 裸露焊盤
供應(yīng)商設(shè)備封裝： 32-DFN（7x4）裸露焊盤
包裝： 管件
產(chǎn)品目錄頁(yè)面： 1338 (CN2011-ZH PDF)
LTC4278
2
4278fc
PIN CONFIGURATION
ABSOLUTE MAXIMUM RATINGS
Pins with Respect to VPORTN
VPORTP Voltage......................................... –0.3V to 100V
VNEG Voltage......................................... –0.3V to VPORTP
VNEG Pull-Up Current ..................................................1A
SHDN....................................................... –0.3V to 100V
RCLASS, Voltage............................................ –0.3V to 7V
RCLASS Source Current...........................................50mA
PWRGD Voltage (Note 3)
Low Impedance Source ......VNEG –0.3V to VNEG +11V
Sink Current.........................................................5mA
PWRGD, T2P Voltage............................... –0.3V to 100V
PWRGD, T2P Sink Current.....................................10mA
Pins with Respect to GND
VCC Voltage................................................ –0.3V to 22V
SENSE–, SENSE+ Voltage........................ –0.5V to +0.5V
UVLO, SYNC Voltage...................................–0.3V to VCC
FB Current..............................................................±2mA
VCMP Current .........................................................±1mA
Operating Ambient Temperature Range
LTC4278C ................................................ 0°C to 70°C
LTC4278I..............................................–40°C to 85°C
(Notes 1, 2)
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
33
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
VPORTP
NC
PWRGD
NC
VNEG
NC
PG
PGDLY
RCMP
CCMP
SENSE+
SENSE–
UVLO
VCMP
SHDN
T2P
RCLASS
NC
VPORTN
NC
SG
VCC
tON
ENDLY
SYNC
SFST
OSC
FB
TOP VIEW
DKD32 PACKAGE
32-LEAD (7mm × 4mm) PLASTIC DFN
TJMAX = 125°C,θJA = 34°C/W, θJC = 2°C/W
GND, EXPOSED PAD (PIN 33) MUST BE SOLDERED TO A
HEAT SINKING PLANE THAT IS CONNECTED TO VNEG
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC4278CDKD#PBF
LTC4278CDKD#TRPBF
4278
32-Lead (7mm
× 4mm) Plastic DFN
0°C to 70°C
LTC4278IDKD#PBF
LTC4278IDKD#TRPBF
4278
32-Lead (7mm
× 4mm) Plastic DFN
–40°C to 85°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
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