ncv8881 ON Semiconductor, ncv8881 Datasheet - Page 28

• Manufacturer Part Number: ncv8881
• Description: Ncv8881 1.5a Automotive Buck Regulator With Watchdog
• Manufacturer: ON Semiconductor

ENABLE
ENABLE
RESB
RESB
3.3V
3.3V
WDI
5V
WDI
5V
VIN
VIN
WATCHDOG STUCK LOW, THEN RECOVERS; ENABLE = HIGH
0
0
DELAY
DELAY
POR
POR
1
1
Figure 54. Watchdog Stuck LOW, Then Normal; EN Input HIGH
2
2
BOOT DELAY
BOOT DELAY
Figure 55. Watchdog is Too Slow; EN Input HIGH
3
3
NORMAL RESPONSE
4
4
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WATCHDOG
WDI TOO SLOW
DELAY
5
5
WATCHDOG
28
DELAY
6
6
DELAY
POR
7
7
DELAY
POR
BOOT DELAY
8
8
BOOT DELAY
WDI STUCK LOW
9
9
WATCHDOG
WDI TOO SLOW
10
10
DELAY
WATCHDOG
DELAY
11
11
DELA
PO
D
P