LTC4253/LTC4253A
34
425353aff
For more information www.linear.com/4253
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
LINEAR TECHNOLOGY CORPORATION 2002
LT 0113 REV F • PRINTED IN USA
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com/4253
RELATED PARTS
TYPICAL APPLICATION
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, Autoretry/Latched Off
LTC1642A Fault Protected Hot Swap Controller 3V to 16.5V, Overvoltage Protection up to 33V
LT4250 –48V Hot Swap Controller Active Current Limiting, Supplies from –20V to –80V
LTC4251/LTC4251-1/
LTC4251-2
–48V Hot Swap Controllers in SOT-23 Fast Active Current Limiting, Supplies from –15V
LTC4252-1/LTC4252-2
LTC4252A-1/LTC4252A-2
–48V Hot Swap Controllers in MS8/MS10 Fast Active Current Limiting, Supplies from –15V, Drain
Accelerated Response, 1% Accurate UV/OV Thresholds
Figure 17. –48V/2.5A Application with Foldback Current Limiting and Transistor Enabled Sequencing without Feedback
R6
100k
R5
100k
R7
100k
PWRGD1
V
IN
EN2 EN3
V
IN
V
EE
LTC4253A
POWER
MODULE 1
PWRGD2
PWRGD3
OV
UV
RESET
DRAIN
SS
GATESQTIMER
SENSETIMER
EN
POWER
MODULE 2
EN
POWER
MODULE 3
EN
R
IN
10k
20k(1/4W)/2
4253 F17
R
C
10Ω
R3
38.3k
R
D
3.3M
R
S
0.02Ω
Q1
IRF530S
V
OUT
C
C
10nF
R4
22Ω
C
T
1µF
C1
10nF
R8
47k
C
SQ
0.1µF
C
SS
33nF
+
C3
0.1µF
C2
100µF
C
IN
1µF
R2
392k
1%
R1
30.1k
1%
†
†
†
RESET
(LONG PIN)
–48V RTN
(SHORT PIN)
–48V RTN
(LONG PIN)
–48V
(LONG PIN)
*DIODES, INC.
†
FMMT493
††
RECOMMENDED FOR HARSH ENVIRONMENTS.
D
IN
††
DDZ13B*
