SMH4042
CompactPCI Applications Aid
Figure 3. Power Control and Power Plane Isolation
Early
Power
I/Os
Circuits
Pre-Charge
Early
Power
Long Power Pin
VGATE5
Vref
CBI_5
SMH4042
VCC5
Medium Power Pin
Backend
Power Plane
CARD_5V_MON
CARD_3V_MON
HST_3V_MON
Early
Power
Long Power Pin
CBI_3
VGATE3
Medium Power Pin
Sense
Resistor
Current
Limit
Resistor
Medium Ground Pin
Long Ground Pins
2037 ILL24.0
Figure 4. Typical delay between VGATE5 and VGATE3
15V
10V
5V
VGATE5
VGATE3
0V
t0
10ms
20ms
30ms
16
40ms
50ms
60ms
2037 ILL25.0
2037-07 9/23/99