SMH4042A
Power Control and Power Plane Isolation
Early
Power
Circuits
I/Os
Pre-Charge
Early
Power
Long Power Pin
VGATE5
CBI_5
Vref
SMH4042A
Medium Power Pin
VCC5
Backend
Power Plane
CARD_5V_MON
CARD_3V_MON
Early
Power
HST_3V_MON
Long Power Pin
CBI_3
VGATE3
Medium Power Pin
Sense
Resistor
Current
Limit
Resistor
Medium Ground Pin
Long Ground Pins
2070 Fig12
Figure 12. Power Control and Power Plane Isolation
15
10
VGATE5
VGATE3
5
0
0
10
20
30
TIME (ms)
40
50
60
Figure 13. Typical Delay: VGATE5 to VGATE3
SUMMIT MICROELECTRONICS, Inc.
2070 9.1 5/27/03
17