Datasheet

20
LTC1421/LTC1421-2.5
APPLICATIONS INFORMATION
WUU
U
Figure 21. –48V to 5V Hot Swappable Supply
Figure 22. 24V to 5V Hot Swappable Supply Using the LT1074CT
10
9
13
14
8
11
15
6
7
2
24
4
3
1
LTC1421
16
R4
300Ω
1/8W
R3
56k
1/8W
Q2
MPSA06
Q1
IRFR9110
C1
1µF
171819202122
512
23
STAGGERED CONNECTOR
C2
2.2µF
25V
R1
5.1k
1/4W
D1
5.1V
S1
+
C3
2.2µF
25V
+
C4
200µF
50V
D4
MBR745
L1
50µH
2
5
1
3
4
+
+
C5
500µF
25V
5V
5A
C6
0.01µF
1421 F22
PC BOARDBACKPLANE
24V
POR
FAULT
R5
10k
1/2W
R9
2.7k
R6
620Ω
1/8W
R2
15k
1/8W
R7
2.8k
1%
R8
2.21k
1%
LT1074CT
GND
V
IN
V
SW
V
C
FB
1µF
LTC1421
17
8
14
13
15
18
11
1
24
12
3
2
192223
STAGGERED CONNECTOR
4N25
5V
10A
1421 F21
VICOR
VI-J30-CY
GATE IN
R1
5.1k
D1
4.3V
0.1µF
0.1µF
R3
10k
R2
300Ω
100Ω
Q1
1N4148
4.7k
PC BOARDBACKPLANE
–48V
–48V
C1
0.1µF
100µF 100µF
++
––
1µF