MIC2593

Dual-Slot PCI Hot Plug Controller

LITTLE FOOT is a registered trademark of Siliconix Incorporated.

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (

September 2008

M9999-092208

General Description

The MIC2593 is a power controller supporting power

distribution

requirements

for

Peripheral

Component

Interconnect hot plug systems compliant to PCI v2.3 and

PCI-X 1.0b. TheMIC2593 provides complete power control

the PCI v2.3 specification. Support for +5V, +3.3V, +12V,

and –12V supplies is provided and includes programmable

current limit, voltage supervision, fault reporting, and circuit

breaker functions which provide fault isolation. The

MIC2593 also incorporates an SMBus interface that

provides complete status and control of power within each

slot.

Data sheets and support documentation can be found on

Micrel’s web site at: www.micrel.com.

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,

–

Integrated gate driver circuits, current sense, and

–

High-side +5V and +3.3V gate driver circuits for

external N-Channel MOSFETs

• Overcurrent protection with adjustable timeout

eliminates 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

5V & 3V Fast-trip

Threshold

+12V & –12V Fast-trip

Threshold

Operating

Temp. Range

Package

Lead Finish

MIC2593-2BTQ

100mV

1.5A/0.4A

0° to +70°C

48-Pin TQFP

Standard

MIC2593-2YTQ

100mV

1.5A/0.4A

0° to +70°C

48-Pin TQFP

Pb-Free

Note:

Contact factory for availability of the MIC2593-5YTQ option that disables the 100mV fast-trip threshold.