ISL88011, ISL88012, ISL88013, ISL88014, ISL88015
VDD
VTHVDD
1V
WDI
START tWDT
< tWDT
< tWDT
tWDT
STARTtWDT
RST
tPOR
>tWDPS
tPOR
RST
FIGURE 5. WATCHDOG TIMING DIAGRAM
Typical Application Circuits
12V
12V
10K
12V SUPPLY
180K
VDD
RST
VMON
100K
RESET
10K
4.7V
ISL88014 / ISL88015
VTH @ 11.4V
FIGURE 6. HIGH ACCURACY 12V SUPPLY MONITOR
12V
5V
180K
VTH @ 11.4V
10K
VDD
RST
VMON
ISL88012
100K
RST
FIGURE 8. MONITOR 5V AND 12V SUPPLIES
44K
0.1µF
10K
VDD
RST
RST
PGOOD @ 10.8V
PGOOD @ 10.8V
ISL88011IH531Z
FIGURE 7. 12V SUPPLY PGOOD or PGOOD
+5V
100K 100K
100K
VTH2 @ 4.4V
6.81K
VDD
RST
V2MON
GND
-5V
ISL88012IH546Z
100K
-5V
PGOOD = HIGH IF -V < -4.6V AND -V + +V > 9.4 (abs)
FIGURE 9. +5V AND -5V MONITOR
PGOOD
8
FN8093.0
February 13, 2006