LT1640L/LT1640H
Negative Voltage
Hot Swap Controller
FEATURES
s
s
s
s
s
s
s
DESCRIPTION
The LT
廬
1640L/LT1640H is an 8-pin, negative voltage Hot
Swap
TM
controller that allows a board to be safely inserted
and removed from a live backplane. Inrush current is
limited to a programmable value by controlling the gate
voltage of an external N-channel pass transistor. The pass
transistor is turned off if the input voltage is less than the
programmable undervoltage threshold or greater than the
overvoltage threshold. A programmable electronic circuit
breaker protects the system against shorts. The PWRGD
(LTC1640L) or PWRGD (LTC1640H) signal can be used to
directly enable a power module. The LT1640L is designed
for modules with a low enable input and the LT1640H for
modules with a high enable input.
The LT1640L/LT1640H 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.
Allows Safe Board Insertion and Removal
from a Live 鈥?48V Backplane
Operates from 鈥?0V to 鈥?80V
Programmable Inrush Current
Programmable Electronic Circuit Breaker
Programmable Overvoltage Protection
Programmable Undervoltage Lockout
Power Good Control Output
APPLICATIONS
s
s
s
Central Office Switching
鈥?48V Distributed Power Systems
Negative Power Supply Control
TYPICAL APPLICATION
Input Inrush Current
GND
R4
562k
1%
UV = 37V
R5
9.09k
1%
R6
10k
1%
8
V
DD
3
UV
LT1640L
2
OV
V
EE
4
SENSE
5
C1
33nF
24V
GATE
6
R2
10鈩?/div>
5%
R3
10k
5%
C2
3.3nF
100V
2
1
C3
0.1碌F
100V
ON/OFF
9
V
OUT+
V
IN+
8
SENSE
+
7
TRIM
6
SENSE
鈥?/div>
5
V
OUT鈥?/div>
V
IN鈥?/div>
LUCENT
JW050A1-E
5V
DRAIN
7
PWRGD
1
CONTACT
BOUNCE
OV = 71V
R1
0.02鈩?/div>
5%
鈥?48V
Q1
IRF530
+
C4
100碌F
100V
4
+
C5
100碌F
16V
1640 F07b
1640 TA01
U
U
U
1
LT1640HIN8 產(chǎn)品屬性
LT1640L/H
50
集成電路 (IC)
PMIC - 熱交換
-
熱交換控制器
通用
無
-
-10 V ~ -80 V
-40°C ~ 85°C
通孔
8-DIP（0.300"，7.62mm）
8-PDIP
管件
LT1640HIN8相關(guān)型號PDF文件下載
-
型號
版本
描述
廠商
下載
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