X80120 Datasheet, PDF (10/17 Pages) Intersil Corporation – Voltage Supervisor/Sequencer Dual Programmable Time Delay with Local/Remote Voltage Monitors

X80120, X80121
V1MON
t_DELAY1
V1GDO
Programmable
Delay
Can Choose Different
Delays for each
Voltage Monitor
100ms
500ms
1 sec
5 secs
V4MON
t_DELAY4
Programmable
Delay
V4GDO
t_SPOR
Programmable
Delay
RESET
Timing
not to scale
FIGURE 8. PARALLEL POWER CONTROL - TIMING
12V
Power _5V
Supply
Power _1.2V
Supply
On/Off
Power _3.3V
Supply
On/Off
X80120/21
5V
V4GDO
V4MON
V_CC
V1GDO
V1MON
RESET
MR
µC
V_CC1
RESET
V_CC2
FPGA
V_CC1
V_CC2
ASIC
V_CC1
V_CC2
FIGURE 9. EXAMPLE OF RELAY POWER SUPPLY
SEQUENCING
V₁MON
(5V)
t_DELAY1
V1GDO
Power Supply
#2 OUTPUT
(1.2V)
V4GDO
Power Supply
#3 OUTPUT
(3.3V
RESET
V1MON
threshold
Programmable
Delay
100ms
500ms
1sec
5sec
Power Supply
#2 ON
Timing Not
To Scale
Example: Two Independent
Power Supplies in relay timing
t_DELAY4
V4MON
threshold
Programmable
Delay
100ms
500ms
1sec
5sec
Power Supply
#3 ON
t_SPOR
FIGURE 10. RELAY SEQUENCING OF DC-DC SUPPLIES (TIMING)
10
FN8151.0
January 20, 2005