MIC5210

Dual 150mA LDO Regulator

MM8 and Micrel Mini 8 are trademarks of Micrel, Inc.

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

September 2006

1

M9999-090806

General Description

The MIC5210 is a dual linear voltage regulator with very

low dropout voltage (typically 10mV at light loads and

140mV at 100mA), very low ground current (225µA at

10mA output), and better than 1% initial accuracy. It also

features

individual

logic-compatible

enable/shutdown

control inputs.

Both regulator outputs can supply up to 150mA at the

same time as long as each regulator’s maximum junction

temperature is not exceeded.

Key features include an undervoltage monitor with an error

flag output, a reference bypass pin to improve its already

low-noise performance (8-pin versions only), reversed-

battery protection, current limiting, and overtemperature

shutdown.

Designed especially for hand-held battery powered

devices, the MIC5210 can be switched by a CMOS or TTL

compatible logic signal, or the enable pin can be

connected to the supply input for 3-terminal operation.

When disabled, power consumption drops nearly to zero.

Dropout ground current is minimized to prolong battery life.

Key features include current limiting, overtemperature

shutdown, and protection against reversed battery.

The MIC5210 is available in 2.7V, 2.8V, 3.0V, 3.3V, 3.6V,

4.0V and 5.0V fixed voltage configurations. Other voltages

are available; contact Micrel for details.

Data sheets and support documentation can be found on

Micrel’s web site at www.micrel.com.

Features

• Micrel Mini 8™ MSOP package

• Up to 150mA per regulator output

• Low quiescent current

• Low dropout voltage

• Wide selection of output voltages

• Tight load and line regulation

• Low temperature coefficient

• Current and thermal limiting

• Reversed input polarity protection

• Zero off-mode current

• Logic-controlled electronic enable

Applications

• Cellular telephones

• Laptop, notebook, and palmtop computers

• Battery-powered equipment

• Bar code scanners

• SMPS post-regulator/dc-to-dc modules

• High-efficiency linear power supplies

Typical Application

Low-Noise + Ultralow-Noise (Dual) Regulator