LTC1643H_15 Datasheet, PDF (10/16 Pages) Linear Technology – PCI-Bus Hot Swap Controller

LTC1643L/LTC1643L-1/LTC1643H
APPLICATIONS INFORMATION
SYSTEM
POWER
SUPPLY
R2
Q2
1 ^0.005Ω 2 ^IRF7413
3
4
R5
10Ω
R1
Q1
1 ^0.007Ω 2 ^IRF7413
3
4
R6
10Ω
R7
100Ω
9
10
11
3
13
12
PCI
POWER
SYSTEM
CONTROLLER
8
3V_IN
GND
1
2
12V_IN
V_EEIN
3V_SENSE GATE 3V_OUT 5V_IN
5V_SENSE
5
ON
R3
LTC1643H
10k ₆
FAULT
R4
10k _{7 PWRGD}
RESET
14
5V_OUT
16
12V_OUT
15
V_EEOUT
4
TIMER
Figure 1. Typical Application
5V
5A
3.3V
7.6A
GND
C1
0.047µF
12V
500mA
–12V
100mA
C2
0.1µF
LOGIC
RESET
1643 F01
ON
10V/DIV
TIMER
10V/DIV
GATE
10V/DIV
12V_OUT
5V/DIV
5V_OUT
5V/DIV
3V_OUT
5V/DIV
V_EEOUT
5V/DIV
ON
10V/DIV
TIMER
10V/DIV
GATE
10V/DIV
12V_OUT
5V/DIV
5V_OUT
5V/DIV
3V_OUT
5V/DIV
V_EEOUT
5V/DIV
FAULT
10V/DIV
PWRGD
10V/DIV
10ms/DIV
Figure 2. Normal Power-Up Sequence
10
FAULT
10V/DIV
PWRGD
10V/DIV
1643 F02
10ms/DIV
1643 F03
Figure 3. Normal Power-Down Sequence