Datasheet

16
LTC1645
1645fa
Figure 17. Ramping Up 5V Followed by 3.3V
IRF7413
IRF7413
10Ω
10Ω
28k
1%
R
HYST
681k
14.7k
1%
10k
1%
0.01µF
25V
0.33µF
112
2
3
8
9
6
5
11
7
10
4
ON
FAULT
TIMER GND
1314
V
CC1
SENSE1
GATE2
GATE1
V
CC2
V
IN2
3.3V
V
IN1
5V
V
OUT1
5V
5A
D1
1N4148
V
OUT2
3.3V
5A
LTC1645
(14-LEAD)
COMP
+
COMPOUT
FB
SENSE2
FAULT
1645 F17
0.01µF
25V
RESET
+
C
LOAD1
C
LOAD2
+
10k
R1
47.5k
1%
R2
10k
1%
10k 10k
10k
1%
µP RESET2
µP RESET
0.005Ω*
0.005Ω*
13k
1%
*LRF1206-01-R005-J (IRC)
BOTH CURRENT LIMITS: 10A
APPLICATIO S I FOR ATIO
WUUU
Figure 18. Power Supply Multiplexer
Q1A Q1B
10Ω
R2
10k
0.1µF
25V
0.33µF
10Ω
112
2
3
8
9
6
5
11
7
1314
10
4
V
CC1
ON
FAULT
TIMER GND
SENSE1
GATE2
GATE1
V
CC2
V
IN1
3.3V
V
IN2
5V
D1
1/2 BAT54C
D2
1/2
BAT54C
Q3
PN2222
V
OUT
5V OR
3.3V
5A
LTC1645
(14-LEAD)
COMP
+
COMPOUT
FB
SENSE2
1645 F18
0.1µF
25V
RESET
22.6k
1%
R1
10k
10k
10k
11.3k
1%
IRF7313
Q2A Q2B
IRF7313