MIC2590B
Micrel
MIC2590B
Dual-Slot PCI Hot Plug Controller
Final Information
General Description
The MIC2590B is a power controller supporting power distri-
bution requirements for Peripheral Component Interconnect
(PCI) hot plug compliant systems incorporating the Intelligent
Platform Management Interface (IPMI). The MIC2590B pro-
vides complete power control support for two PCI slots
including the 3.3V
AUX
defined by the PCI 2.2 specification.
Support for +5V, +3.3V, +12V and –12V supplies is provided
including programmable constant-current inrush limiting,
voltage supervision, programmable current limit, fault report-
ing and circuit breaker functions which provide fault isolation.
The MIC2590B also incorporates a SMBus interface in which
complete status and control of power within each slot is
provided. Data such as voltage and current from each supply
of each slot can be obtained for IPMI sensor records in
addition to power status of each slot.
Features
• Supports two independent PCI 2.2 slots
• SMBus interface for slot power control and status
• +5V, +3.3V, +12V, –12V, +3.3V
AUX
supplies supported
per PCI specification 2.2
• Programmable inrush current-limiting
• Active current regulation controls inrush current
• Electronic circuit breaker
• Dual level fault detection for quick fault response without
nuisance tripping
• Thermal isolation between circuitry for slot A
and slot B
Applications
• PCI hot-plug power distribution
Ordering Information
Part Number
MIC2590B-2BTQ
MIC2590B-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.
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
August 2002
1
MIC2590B
MICREL [ MICREL SEMICONDUCTOR ]
