MIC2586/MIC2586R

Single-Channel, Positive High-Voltage

Hot Swap Controller/Sequencer

Power, Connect and Protect is a trademark of Micrel, Inc

Micrel, Inc • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax +1 (408) 474-1000 • http://www.micrel.com

October 2004

1

M9999-102204

(408) 955-1690

General Description

The MIC2586 and MIC2586R are single-channel positive

voltage hot swap controllers/sequencers designed to provide

safe insertion and removal of boards for systems that require

live (always-powered) backplanes. These devices use few

external components and act as controllers for external N-

channel power MOSFET devices to provide inrush current

control and output voltage slew rate control.

Overcurrent

fault

protection

is

provided

via

programmable

analog

foldback current limit circuitry equipped with a programmable

overcurrent filter. These protection circuits combine to limit

the power dissipation of the external MOSFET to insure that

the MOSFET is in its SOA during fault conditions.

The

MIC2586 provides a circuit breaker function that latches the

output MOSFET off if the load current exceeds the current

limit threshold for the duration of the programmable timer.

Conversely, the MIC2586R will attempt to restart power after

a load current fault with a low duty cycle to prevent the

MOSFET from overheating. Each device provides either an

active-HIGH (-1BM) or an active-LOW

(-2BM) “Power-is-

Good” signal. The MIC2586 and the MIC2586R provide up

to three, time-sequenced "Power-is-Good" outputs that can

be used as a control for dc-dc converter circuits or power

modules.

Data sheets and support documentation can be found on

Micrel’s web site at www.micrel.com.

Features

• Operates from +10V to +80V with 100V ABS MAX

operation

• Industrial temperature specifications at V

• Programmable current limit with analog foldback

• Active current regulation minimizes inrush current

• Electronic circuit breaker for overcurrent fault protection

-

Output latch off (MIC2586) or

-

Output auto-retry (MIC2586R)

• Fast responding circuit breaker (< 2µs) to short circuit

loads

• Programmable input undervoltage lockout

• Fault Reporting:

Three Open-drain “Power-is-Good” outputs for enabling

DC/DC converter(s)

-

Active-HIGH: MIC2586-1/MIC2586R-1

-

Active-LOW: MIC2586-2/MIC2586R-2

Applications

• General-purpose hot board insertion

• High-voltage, high-side electronic circuit breaker

• +12V/+24V/+48V Distributed Power Systems

• +24V/+48V Industrial/Alarm Systems

• Telecom Systems

• Medical systems

________________________________________________________________________________________________________________

Ordering Information

Part Number

Standard

Pb-Free

PWRGD Polarity

Circuit Breaker Function

Package

MIC2586-1BM

MIC2586-1YM

Active-HIGH

Latched

14 pin SOIC

MIC2586-2BM

MIC2586-2YM

Active-LOW

Latched

14 pin SOIC

MIC2586R-1BM

MIC2586R-1YM

Active- HIGH

Auto-retry

14 pin SOIC

MIC2586R-2BM

MIC2586R-2YM

Active-LOW

Auto-retry

14 pin SOIC

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