SMH4042A Datasheet, PDF (25/28 Pages) Summit Microelectronics, Inc. – Distributed Power Hot-Swap Controller for CompactPCI

SMH4042A
Although the primary application for the SMH4042A is as
a voltage controller for CompactPCI or VME boards, it is
versatile enough to be used as a Hot Plug controller on a
host PCI card. The functional blocks are similar to those
of the CompactPCI implementation but they are now
resident on the motherboard. The same circuits shown
for switching the voltages on the card can also be used
for controlling the slot voltages.
Power Supply
PWR_EN
PCI_RST#
FAULT#
12V
+12V and -12V
DRVREN#
–12V
MOSFETs
SMH4042A
VGATE3
VGATE5
CBI 3
CBI 5
5V
+5V and +3V
MOSFETs
3.3V
HEALTHY#
[SGNL_VLD]
CARD_3V_MON
CARD_5V_MON
LOCAL_PCI_RST#
PCI Bus
BUFFERED PCI BUS
SLOT CONTROL
Figure 22. Diagram for a PCI Hot Plug Slot Implementation
2070 Fig22
SUMMIT MICROELECTRONICS, Inc.
2070 9.1 5/27/03
25