Datasheet

LT3592
17
3592fc
APPLICATIONS INFORMATION
Figure 9. A Well Chosen Input Network Prevents Input Voltage Overshoot and
Ensures Reliable Operation When the LT3592 is Connected to a Live Supply
+
+
LT3592
V
IN
GND
LT3592
V
IN
GND
1µF
V
IN
20V/DIV
I
IN
10A/DIV
5µs/DIV
V
IN
CLOSING SWITCH
SIMULATES HOT PLUG
I
IN
LOW
IMPEDANCE
ENERGIZED
32V SUPPLY
STRAY
INDUCTANCE
DUE TO 6 FEET
(2 METERS) OF
TWISTED PAIR
+
+
2.2µF
10µF
50V
2.2µF
0.1µF
1Ω
3493 F09
V
IN
20V/DIV
I
IN
10A/DIV
5µs/DIV
V
IN
20V/DIV
I
IN
10A/DIV
5µs/DIV
LT3592
V
IN
GND
+
+
+
(9a)
(9b)
(9c)
Figure 8. Circuit to Address Reversed Input and Backpowering Issues
V
IN
GND FB
SHDN
SW
D4
V
IN
LT3592
3592 F08
V
OUT
BACKUP
D4: MBR0540
+