24
425112fd
LTC4251/LTC4251-1/
LTC4251-2
For more information www.linear.com/4251
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
LINEAR TECHNOLOGY CORPORATION 2001
LT 0113 REV D • PRINTED IN USA
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com/4251
RELATED PARTS
TYPICAL APPLICATIONS
PART NUMBER DESCRIPTION COMMENTS
LT1640AH/LT1640AL Negative High Voltage Hot Swap Controllers in SO-8 Negative High Voltage Supplies from –10V to –80V
LT1641-1/LT1641-2 Positive High Voltage Hot Swap Controllers in SO-8 Supplies from 9V to 80V, Latched Off/Autoretry
LTC1642 Fault Protected Hot Swap Controller 3V to 16.5V, Overvoltage Protection up to 33V
LTC1921 Dual –48V Supply and Fuse Monitor ±1V UV and ±1.5V OV Threshold Accuracy, ±200V Transient
Protection, Drives Three Optoisolators for Status
LT4250 –48V Hot Swap Controller in SO-8 Active Current Limiting, Supplies from –20V to –80V
LTC4252-1/ LTC4252-2 Negative Voltage Hot Swap Controller in MSOP Fast Active Current Limiting with Drain Accelerated Response,
Supplies from –15V
LTC4253 Negative Voltage Hot Swap Controller with
3-Output Sequencer
Fast Active Current Limiting with Drain Accelerated Response,
Supplies from –15V
+
LTC4251
UV/OV
TIMER
GATE
SENSE
V
IN
V
EE
1
2
3
4
5
6
LOAD
–48RTN
–48RTN
(SHORT PIN)
R1
402k
1%
R
C
10Ω
R
S
0.01Ω
R3
22Ω
R2
32.4k
1%
–48V
C
T
82nF
C1
10nF
C
C
22nF
C
IN
1µF
C
L
100µF
R
IN
10k
500mW
Q1
IRF540
425112 TA03
PUSH-
RESET
S1
4
3
2
1
**DIODES, INC.
†RECOMMENDED FOR HARSH ENVIRONMENTS
D
IN
†
DDZ13B**
+
LTC4251-1
UV/OV
TIMER
GATE
SENSE
V
IN
V
EE
1
2
3
4
5
6
LOAD
–48RTN
–48RTN
(SHORT PIN)
R1
442k
1%
R
C
10Ω
R
S
0.02Ω
R2
34.8k
1%
–48V
C
T
220nF
C1
10nF
C
C
22nF
C
IN
1µF
D1
BZX84C36
C
L
100µF
R
IN
10k
500mW
R3
31.6k
R4
22Ω
V
OUT
Q1
IRF540S
425112 TA04
4
3
2
1
**DIODES, INC.
†RECOMMENDED FOR HARSH ENVIRONMENTS
D
IN
†
DDZ13B**
Figure 16. –48V/5A Application with Reverse SENSE Pin Limiting and Push-Reset at TIMER Pin
Figure 17. Power-Limited Circuit Breaker Application
