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MIC2590B
Dual-Slot PCI Hot Plug Controller
 
 
 
Micrel Inc. " 2180 Fortune Drive " San Jose, CA 95131 " USA " tel +1 (408) 944-0800 " fax + 1 (408) 474-1000 " http://www.micrel.com
September 2008 
 
M9999-091808
 
General Description 
The MIC2590B is a power controller supporting power
distribution requirements for Peripheral Component Inter-
connect (PCI) hot plug compliant systems incorporating
the Intelligent Platform Management Interface (IPMI). The
MIC2590B provides 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 reporting 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.
Data sheets and support documentation can be found on
Micrels web site at: www.micrel.com.
Features 
"   Supports two independent PCI 2.2 slots
"   SMBus interface for slot power control and status
"   +5V, +3.3V, +12V, 12V, +3.3VAUX 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
Standard
Pb-Free
5V & 3V Fast-trip
Threshold
+12V & 12V Fast-trip
Threshold
Operating
Temp. Range
Package
MIC2590B-2BTQ
MIC2590B-2YTQ
100mV
1.5A/0.4A
0?to +70癈
48-Pin TQFP
MIC2590B-5BTQ*    MIC2590B-5YTQ*
Disabled
1.5A/0.4A
0?to +70癈
48-Pin TQFP
 
Note:
 
   * Contact factory for availability.
 
 
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