Datasheet

LTC4252B-1/LTC4252B-2
LTC4252C-1/LTC4252C-2
27
4252b12f
APPLICATIONS INFORMATION
TIMER
GATE
SENSE
V
ACL
V
CB
SS
DRAIN
230µA + 8 • I
DRN
V
IN
– V
GATEH
V
DRNL
425212B F15
V
DRNCL
V
GATEL
V
TMRL
V
TMRH
PWRGD
5.8µA
5.8µA
5.8µA
58µA
58µA
1 2 34 5 67 8 9
SWITCH RELEASES SS
SWITCH RESETS LATCHED TIMER
GATE START-UP
20 • V
OS
20 • (V
CB
+ V
OS
)
20 • (V
ACL
+ V
OS
)
MOMENTARY DPST SWITCH RESET
TIMER
GATE
SENSE
V
OUT
V
ACL
V
CB
SS
DRAIN
230µA + 8 • I
DRN
V
TMRH
V
TMRL
V
GATEL
230µA + 8 • I
DRN
V
IN
– V
GATEH
V
DRNL
4252B12 F16
V
DRNCL
PWRGD
58µA
58µA
5.8µA 5.8µA
5.8µA
5.8µA5.8µA5.8µA
5.8µA5.8µA5.8µA
GATE
START-UP
SHUTDOWN COOLING
CB FAULT
20 • V
OS
20 • (V
CB
+ V
OS
)
20 • (V
ACL
+ V
OS
)
1 2 3 4 5 6 78 9 10
RETRY
CIRCUIT BREAKER TIMES OUT
Figure 16. Shutdown Cooling Timing Behavior of LTC4252-2 (All Waveforms Are Referenced to V
EE
)
Figure 15. Pushbutton Reset of LTC4252-1’s Latched Fault
(All Waveforms Are Referenced to V
EE
)