MIC2580A_05 Datasheet, PDF (6/21 Pages) Micrel Semiconductor – Hot-Swap PCI Power Controller

MIC2580A
Timing Diagrams
/ON
+5V
5VOUT
0V
+3.3V
3VOUT
0V
+12V
12VOUT
0V
0V
M12VOUT
–12V
/PWRGD
/FAULT
/POR
t_RESET
Figure 1. Controller Timing: Normal Cycle
Micrel, Inc.
/ON
+5V
5VOUT
0V
+3.3V
3VOUT
0V
+12V
12VOUT
Short Circuit
0V
0V
M12VOUT
–12V
/PWRGD
/FAULT
t_START
/POR
Figure 2. Controller Timing: Enable Into Short
/ON
+5V
5VOUT
0V
+3.3V
3VOUT
0V
+12V
12VOUT
Fault
Circuit Breaker
Reset
0V
0V
M12VOUT
–12V
/PWRGD
/FAULT
Figure 3. Controller Timing: Short on 5V
V_IN
+5V
/EPWRGD
0V
t_/good
}1V
t_good
V_PGTH
Figure 4. Early Power Good Response Time
MIC2580A
6
February 2005