MIC5206

Micrel

January 2000

1

MIC5206

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 (600

µA 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-lead 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 adjust-

able output voltage versions, featuring the reference bypass

option, are available in the 8-lead Micrel Mini 8™ 8-lead

MSOP (micro small-outline package).

For low-dropout regulators that are stable with ceramic

output capacitors, see the

µCap MIC5245/6/7 family.

15

2

34

1µF tantalum

Enable

Shutdown

MIC5206-x.xBM5

Enable (pin 3) may be

connected directly to

Supply Input (pin 1).

100k

Flag Output

(optional)

Typical Applications

1

2

3

4

8

7

6

5

1µF

Flag Output

(optional)

47k

R1

R2

MIC5206BMM

Enable (pin 7) may be

connected directly to

Supply Input (pin 8).

Enable

Shutdown

tantalum

SOT-23-5 Fixed Voltage Application

Adjustable Voltage Application

MIC5206

150mA Low-Noise LDO Regulator

Features

• Error flag indicates undervoltage fault

• High output voltage accuracy

• Guaranteed 150mA output

• Ultra-low-noise output (8-lead 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

• PCMCIA V

• Consumer/personal electronics

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

• High-efficiency linear power supplies

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

Micrel Mini 8™ is a trademark of Micrel, Inc.