ISL8723 Datasheet, PDF (9/14 Pages) Intersil Corporation – Power Sequencing Controllers

ISL8723, ISL8724
Typical Performance Waveforms
ENABLE
RESET
SYSRST
I/O = 5V/DIV
5VOUT
3.3VOUT
2.5VOUT
1.5VOUT
VOUT = 2V/DIV
40ms/DIV
FIGURE 13. ISL8723 SEQUENCED TURN-ON
ENABLE
RESET
I/O = 5V/DIV
5VOUT
SYSRST
2.5VOUT
3.3VOUT
1.5VOUT
VOUT = 2V/DIV
20ms/DIV
FIGURE 14. ISL8723 SEQUENCED TURN-OFF
EN 5V/DIV
t_delENLO
GATE 2V/DIV
DLY_ON 0.5V/DIV
DLY_Vth
3.3VO 2V/DIV
FIGURE 15. ISL8723 3.3V TURN-ON
4ms/DIV
DLY_OFF 0.5V/DIV
EN 5V/DIV
DLY_Vth
GATE 2V/DIV
3.3VO 2V/DIV
10ms/DIV
FIGURE 16. ISL8723 3.3V TURN-OFF
VDD
SYSRST
RESET
GATE
SYSRST
RESET
FIGURE 17. SYSRST AND RESET vs VDD (EN = VDD, 4 UVLO
> UVLO Vth)
9
FIGURE 18. SYSRST LOW TO GATE AND RESET LOW
FN6413.1
April 22, 2009