1
LTC1422
1422fb
Hot Swap Controller
s
Allows Safe Board Insertion and Removal
from a Live Backplane
s
System Reset Output with Programmable Delay
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Programmable Electronic Circuit Breaker
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User-Programmable Supply Voltage Power-Up Rate
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High Side Driver for an External N-Channel FET
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Controls Supply Voltages from 2.7V to 12V
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Undervoltage Lockout
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Soft Reset Input
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Glitch Filter on RESET
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Available in 8-Pin Narrow PDIP and SO Packages
5V Hot Swap
The LTC
?/DIV>
1422 is an 8-pin Hot Swap
TM
controller that
allows a board to be safely inserted and removed from a
live backplane. Using an external N-channel pass transis-
tor, the board supply voltage can be ramped up at a
programmable rate. A high side switch driver controls the
N-channel gate for supply voltages ranging from 2.7V to
12V.
A programmable electronic circuit breaker protects
against shorts. The RESET output can be used to generate
a system reset when the supply voltage falls below a
programmable voltage. The ON pin can be used to cycle
the board power or to generate a soft reset.
The LTC1422 is available in 8-pin PDIP and SO packages.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Hot Swap is a trademark of Linear Technology Corporation.
s
Hot Board Insertion
s
Electronic Circuit Breaker
+
V
CC
SENSE GATE
LTC1422
GND
TIMER
ON
8
3
4
7
6
R2
10&
5%
R3
6.81k
1%
R4
2.43k
1%
R1
0.005&
Q1
MTB50N06V
C1
0.1礔
C
LOAD
V
OUT
5V
V
CC
ON/RESET
GND
1422 TA01
PLUG-IN CARD
BACKPLANE
C2
0.33礔
5
2
1
FB
RESET
RESET
礟
APPLICATIO S
FEATURES
TYPICAL APPLICATIO
DESCRIPTIO