MIC5206

150mA Low-Noise LDO Regulator

Micrel Mini 8 is a trademark of Micrel, Inc.

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

May 2006

M9999-051506

(408) 955-1690

General Description

The MIC5206 is an efficient linear voltage regulator with

very low dropout voltage (typically 17mV at light loads and

165mV at 150mA), and very low ground current (600µA at

100mA output), with better than 1% initial accuracy. It has

a logic compatible enable/shutdown control input and an

internal undervoltage monitor.

Designed especially for hand-held, battery-powered

devices, the MIC5206 can be switched by a CMOS or TTL

compatible

logic

signal.

When

disabled,

power

consumption drops nearly to zero. Dropout ground current

is minimized to prolong battery life.

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.

The MIC5206 is available in several fixed voltages in a tiny

SOT-23-5 package. It features a pinout, similar to the

LP2980, but has significantly better performance. Fixed

and adjustable output voltage versions, featuring the

reference bypass option, are available in the 8-pin Micrel

Mini 8™ 8-pin MSOP (micro small-outline package).

For low-dropout regulators that are stable with ceramic

output capacitors, see the µCap MIC5245/6/7 family.

Data sheets and support documentation can be found on

Micrel’s web site at www.micrel.com.

Features

• Error flag indicates undervoltage fault

• High output voltage accuracy

• Guaranteed 150mA output

• Ultra-low-noise output (8-pin versions)

• Low quiescent current

• Low dropout voltage

• Extremely tight load and line regulation

• Very low temperature coefficient

• Current and thermal limiting

• Reversed-battery protection

• “Zero” off-mode current

• Logic-controlled electronic enable

Applications

• Cellular telephones

• Laptop, notebook, and palmtop computers

• Battery-powered equipment

• Consumer/personal electronics

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

• High-efficiency linear power supplies

Typical Application

SOT-23-5 Fixed Voltage Application

Adjustable Voltage Application