March 2000

1

MIC2025/2075

MIC2025/2075

Micrel

MIC2025/2075

Single-Channel Power Distribution Switch

Preliminary Information

General Description

The MIC2025 and MIC2075 are high-side MOSFET switches

optimized for general-purpose power distribution requiring

circuit protection.

The MIC2025/75 are internally current limited and have

thermal shutdown that protects the device and load. The

MIC2075 offers “smart” thermal shutdown that reduces cur-

rent 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 provided that is

asserted during overcurrent and thermal shutdown condi-

tions.

The MIC2025/75 is available in the MM8™ 8-lead MSOP and

8-lead SOP.

Typical Application

EN

OUT

FLG

IN

ON/OFF

OVERCURRENT

MIC2025/75

Logic Controller

GND

OUT

NC

2.7V to 5.5V

0.1µF

10k

1µF

VIN

GND

NC

Load

Features

• 140m

Ω maximum on-resistance

• 2.7V to 5.5V operating range

• 500mA minimum continuous output current

• Short-circuit protection with thermal shutdown

• Fault status flag with 3ms filter eliminates false asser-

tions

• Undervoltage lockout

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

• Circuit breaker mode (MIC2075) reduces power

consumption

• Logic-compatible input

• Soft-start circuit

• Low quiescent current

• Pin-compatible with MIC2525

Applications

• USB peripherals

• General purpose power switching

• ACPI power distribution

• Notebook PCs

• PDAs

• PC card hot swap

Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com

MM8 is a trademark of Micrel, Inc.