MIC2582/MIC2583

Single Channel Hot Swap Controllers

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

April 2009

M9999-043009-C

General Description

The MIC2582 and MIC2583 are single channel positive

voltage hot swap controllers designed to allow the safe

insertion of boards into live system backplanes. The

MIC2582 and MIC2583 are available in 8-pin SOIC and

16-pin QSOP packages, respectively. Using a few external

components and by controlling the gate drive of an

external N-Channel MOSFET device, the MIC2582/83

provide inrush current limiting and output voltage slew rate

control in harsh, critical power supply environments.

Additionally, a circuit breaker function will latch the output

MOSFET off if the current limit threshold is exceeded for a

determined period. The MIC2583R option includes an

auto-restart function upon detecting an over current

condition.

Datasheets and support documentation can be found on

Micrel’s web site at www.micrel.com.

Features

• MIC2582:

Pin-for-pin functional equivalent to the LTC1422

• 2.3V to 13.2V supply voltage operation

• Surge voltage protection up to 20V

• Current regulation limits inrush current regardless of load

capacitance

• Programmable inrush current limiting

• Electronic circuit breaker

• Optional dual-level overcurrent threshold detects

excessive load faults

• Fast response to short circuit conditions (<1µs)

• Programmable output under-voltage detection

• Under-voltage Lockout (UVLO) protection

• Auto-restart function (MIC2583R)

• Power-On Reset and Power-Good status outputs

(Power-Good for the MIC2583 and MIC2583R only)

• /FAULT status output (MIC2583 and MIC2583R)

Applications

• RAID systems

• Base stations

• PC board hot swap insertion and removal

• +12V backplanes

• Network switches

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Typical Applications

Figure 1. MIC2583/83R Typical Application Circuit