Datasheet

12
LTC1643AL
LTC1643AL-1/LTC1643AH
1643afb
Figure 6. Delay in the Current Limit Loop
R2
0.005Ω
Q2
IRF7413
Q1
IRF7413
R1
0.007Ω
R5
10Ω
R3
20Ω
R6
10Ω
R4
20Ω
R7
100Ω
C1
0.047µF
5V
5A
5V
3.3V
3.3V
7.6A
11 3
13
12 14109
3V
IN
3V
SENSE
5V
SENSE
3V
OUT
LTC1643AL
5V
OUT
5V
IN
GATE
1643A F06
C2
1µF
C3
1µF
43
21
43
21
APPLICATIONS INFORMATION
WUU
U
Figure 4. Power-Up into a Short on 3.3V Output
Figure 5. Short Circuit on 5V Followed by Circuit Breaker Reset
ON
10V/DIV
TIMER
10V/DIV
GATE
10V/DIV
12V
OUT
5V/DIV
3V
OUT
5V/DIV
5V
OUT
5V/DIV
V
EEOUT
5V/DIV
FAULT
10V/DIV
PWRGD
10V/DIV
20ms/DIV
1643A F04
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
20ms/DIV
1643A F05