Typical Applications - Linear Technology LT4363 Datasheet

LT4363
applicaTions inForMaTion
The power dissipation in Q1 is:
14V • 25mV
P = = 35W
10mΩ
During an output overload or soft short, the voltage at the
OUT pin could stay at 2V or higher. The total overcurrent
fault time when V = 2V is:
OUT
47nF • 0.875V
t = = 1.028ms
OC
40µA

Typical applicaTions

C2
0.1µF
18
Overvoltage Regulator with Output Keep Alive During Shutdown
IRLR2908
V
IN
R7
1k
D1*
SMAJ58A
C1
47nF
5
V
CC
6
SHDN
LT4363DE-2
R4
147k
8
UV
R5
30.1k
7
OV
GND
R6
10k
For more information
The power dissipation in Q1 is:
( )
14V – 2V • 50mV
P =
10mΩ
These conditions are well within the Safe Operating Area
of the FDB33N25.
R R9
Q1
SNS
10m 1k, 1W
C **
L
22µF
R3
10
R1
4 3 2
287k
GATE SNS OUT
1
FB
R2
24.9k
11
ENOUT
UV = 6V
10
FLT
TMR
OV = 24V
9 12
4363 TA02
*DIODES INC.
C
TMR
**SANYO 25CE22GA
0.1µF
www.linear.com/LT4363
= 60W
V
OUT
12V, 4A
REGULATED
AT 16V
D2
1N4746A
18V
1W
4363fb