3-168

1997

MIC5208

Micrel

MIC5208

Dual 50mA LDO Voltage Regulator

Preliminary Information

General Description

The MIC5208 is a dual linear voltage regulator with very low

dropout voltage (typically 20mV at light loads and 250mV at

50mA), very low ground current (225

µA at 10mA output), and

better than 3% initial accuracy. It also features individual

logic-compatible enable/shutdown control inputs.

Designed especially for hand-held battery powered devices,

the MIC5208 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 con-

sumption drops nearly to zero. Dropout ground current is

minimized to prolong battery life.

Key features include current limiting, overtemperature shut-

down, and protection against reversed battery.

The MIC5208 is available in 3.0V, 3.3V, 3.6V, 4.0V and 5.0V

fixed voltage configurations. Other voltages are available;

contact Micrel for details.

Features

• Micrel Mini 8™ MSOP package

• Guaranteed 50mA 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

1

2

3

4

8

7

6

5

Output A

MIC5208

1µF

Enable may be connected to VIN

Enable A

Enable B

1µF

Output B

Typical Application

Ordering Information

Part Number

Voltage

Accuracy

Junction Temp. Range*

Package

MIC5208-3.0BMM

3.0

3%

–40

°C to +125°C

8-lead MSOP

MIC5208-3.3BMM

3.3

3%

–40

°C to +125°C

8-lead MSOP

MIC5208-3.6BMM

3.6

3%

–40

°C to +125°C

8-lead MSOP

MIC5208-4.0BMM

4.0

3%

–40

°C to +125°C

8-lead MSOP

MIC5208-5.0BMM

5.0

3%

–40

°C to +125°C

8-lead MSOP

Other voltages available. Contact Micrel for details.