MIC2026/2076

Dual-Channel Power Distribution Switch

UL Recognized Component

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

June 2010

M9999-060410-B

General Description

The MIC2026 and MIC2076 are high-side MOSFET

switches optimized for general-purpose power distribution

requiring circuit protection.

The MIC2026/76 are internally current limited and have

thermal shutdown that protects the device and load.

The MIC2076 offers “smart” thermal shutdown that

reduces current consumption in fault modes. When a

thermal shutdown fault occurs, the output is latched off

until the faulty load is removed. Removing the load or

toggling the enable input will reset the device output.

Both devices employ soft-start circuitry that minimizes

inrush current in applications where highly capacitive loads

are employed.

A fault status output flag is asserted during overcurrent

and thermal shutdown conditions. Transient faults are

internally filtered.

The MIC2026/76 are available in 8-pin DIP or 8-pin SOIC.

All support documentation can be found on Micrel’s web

site at www.micrel.com.

Features

• 140mΩ maximum on-resistance per channel

• 2.7V to 5.5V operating range

• 500mA minimum continuous current per channel

• Shortcircuit protection with thermal shutdown

• Thermally isolated channels

• Fault status flag with 3ms filter eliminates false

assertions

• Undervoltage lockout

• Reverse current flow blocking (no “body diode”)

• Circuit breaker mode (MIC2076)

• Logic-compatible inputs

• Soft-start circuit

• Low quiescent current

• Pin compatible with MIC2526

• UL File # E179633

Applications

• USB peripherals

• General purpose power switching

• ACPI power distribution

• Notebook PCs

• PDAs

• PC card hot swap

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Typical Application

ENA

OUTA

FLGAI

N

FLGB

GND

ENB

OUTB

ON/OFF

OVERCURRENT

OVERCURRENT

ON/OFF

MIC2026-2

Logic Controller

2.7V to 5.5V

0.1µF

VIN

Load

Load

10k

10k