Datasheet

21
LTC1421/LTC1421-2.5
APPLICATIONS INFORMATION
WUU
U
10 11 6 7 8 14 13 15 9
LTC1421
1617181920212223
1
24
4 5 3 2
12
STAGGERED CONNECTOR
S1
3 5
8
64
1
72
C1 1µF 16V
C3 220µF 16V ×4
C4 0.1µF 16V
C5 10µF 16V
D1 1N4148
Q2
MTD20N03HL
Q3 MTD20N03HL
Q4 MTD20N03HL
S2
S1: HARD POWER/CIRCUIT BREAKER RESET S2: SOFT RESET LTC1430 POWER-UP THRESHOLD: 4.8V ON 4.25V OFF
1421 F23
PC BOARDBACKPLANE
5V
C2 0.1µF 16V
LTC1430CS8
V
CC
PV
CC1
COMP
FB
SHDN G1 GND G2
R5
510Ω
5%
R8
100k
1%
R1
0.003Ω
3W, 5%
Q1
MTD20N03HL
C8 220pF CERAMIC
C7
4700pF
CERAMIC
C6 0.1µF 16V
C10 1µF 16V
R9 26.7k 1%
R10 10k 5%
R6 22Ω 5%
R7 7.5k 5%
R4 10k 1%
+
+
C9
330µF
10V
×6
+
2.7µH
15A
RESET
3.3V 10A I
MAX
= 15A
GND
µP
V
CC
1µF
43
21
10k
Figure 23. 5V to 3.3V Hot Swappable Supply Using the LTC1430CS8