MIC2593
Micrel
MIC2593
Dual-Slot PCI Hot Plug Controller
General Description
The MIC2593 is a power controller supporting power distribu-
tion requirements for Peripheral Component Interconnect hot
plug systems compliant to PCI v2.3 and PCI-X 1.0b. The
MIC2593 provides complete power control support for two
PCI slots, including the 3.3V
AUX
defined by the PCI v2.3
specification. Support for +5V, +3.3V, +12V, and –12V sup-
plies is provided and includes programmable current limit,
voltage supervision, fault reporting, and circuit breaker func-
tions which provide fault isolation. The MIC2593 also incor-
porates an SMBus interface that provides complete status
and control of power within each slot.
Features
• Supports two completely independent PCI slots:
- Compliant to PCI v2.3 and PCI-X 1.0b power control
requirements
- Provides all major power control functions for two
independent PCI-X 2.0 slots
• Five voltage supplies supported: +12V, -12V, +5V,
+3.3V, and +3.3V
AUX
- Integrated gate driver circuits, current sense,
and power MOSFETs for 3.3V
AUX
, +12V, and –12V
- High-side +5V and +3.3V gate driver circuits for
external N-Channel MOSFETs
• Overcurrent protection with adjustable timeout elimi-
nates false tripping of circuit breakers
• Dual-level, dual-speed overcurrent detection circuitry for
quick fault response without nuisance tripping
• Slot power control with “Power-is-Good” and Fault
status reporting
- Via software over an SMBus interface or
- Via dedicated hardware input/output lines: Hot Plug
Interface (HPI)
• Complete thermal isolation between circuitry for Slot A
and Slot B
• One General Purpose Input (GPI) pin per slot for
mechanical switch or plug-in card retention/removal
input
Applications
• PCI hot plug power distribution
Ideal Applications:
• Mid- and High-end Server Applications compliant to
PCI v2.3, PCI-X 1.0b, and PCI-X 2.0
Ordering Information
Part Number
MIC2593-2BTQ
MIC2593-5BTQ
5V & 3V Fast-trip
Threshold
100mV
Disabled*
+12V & –12V Fast-trip
Threshold
1.5A/0.4A
1.5A/0.4A
Operating Temp. Range
0°C to +70°C
0°C to +70°C
Package
48-Pin TQFP
48-Pin TQFP
*Contact factory for availability.
LITTLE FOOT is a registered trademark of Siliconix Incorporated
.
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
April 2004
1
M9999-042204
STMICROELECTRONICS [ STMICROELECTRONICS ]
