Linear Technology LTC4278 IEEE802.3at PD Controller with 12V Aux, Vout = 5V, Iout = 4.5A DC1561B DC1561B 데이터 시트
제품 코드
DC1561B
LTC4278
2
4278fc
PIN CONFIGURATION
ABSOLUTE MAXIMUM RATINGS
Pins with Respect to V
PORTN
V
PORTP
Voltage ......................................... –0.3V to 100V
V
NEG
Voltage ......................................... –0.3V to V
PORTP
V
NEG
Pull-Up Current ..................................................1A
SHDN ....................................................... –0.3V to 100V
R
CLASS
, Voltage ............................................ –0.3V to 7V
R
CLASS
Source Current ...........................................50mA
PWRGD Voltage (Note 3)
Low Impedance Source ......V
NEG
–0.3V to V
NEG
+11V
Sink Current .........................................................5mA
PWRGD, T2P Voltage ............................... –0.3V to 100V
PWRGD, T2P Sink Current .....................................10mA
Pins with Respect to GND
V
CC
Voltage ................................................ –0.3V to 22V
SENSE
–
, SENSE
+
Voltage ........................ –0.5V to +0.5V
UVLO, SYNC Voltage ...................................–0.3V to V
CC
FB Current ..............................................................±2mA
V
CMP
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
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
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
11
12
13
14
15
16
V
PORTP
NC
PWRGD
PWRGD
NC
V
PWRGD
PWRGD
NC
V
NEG
V
NEG
NC
PG
PGDLY
R
PG
PGDLY
R
CMP
C
CMP
SENSE
+
SENSE
–
UVLO
V
V
CMP
SHDN
T2P
R
CLASS
NC
V
PORTN
V
PORTN
NC
NC
SG
NC
SG
V
CC
t
ON
ENDLY
SYNC
SFST
OSC
FB
TOP VIEW
DKD32 PACKAGE
32-LEAD (7mm × 4mm) PLASTIC DFN
T
JMAX
= 125°C,
θ
JA
= 34°C/W,
θ
JC
= 2°C/W
GND, EXPOSED PAD (PIN 33) MUST BE SOLDERED TO A
HEAT SINKING PLANE THAT IS CONNECTED TO V
NEG
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:
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/