January 2000

1

MIC5216

MIC5216

Micrel

Typical Applications

MIC5216

500mA-Peak Output LDO Regulator

Preliminary Information

General Description

The MIC5216 is an efficient linear voltage regulator with high

peak output current capability, very low dropout voltage, and

better than 1% output voltage accuracy. Dropout is typically

10mV at light loads and less than 500mV at full load.

The MIC5216 is designed to provide a peak output current for

startup conditions where higher inrush current is demanded.

It features a 500mA peak output rating. Continuous output

current is limited only by package and layout.

The MIC5216 has an internal undervoltage monitor with a flag

output. It also can be enabled or shutdown by a CMOS or TTL

compatible signal. When disabled, power consumption drops

nearly to zero. Dropout ground current is minimized to help

prolong battery life. Other key features include reversed-

battery protection, current limiting, overtemperature shut-

down, and low noise performance.

The MIC5216 is available in fixed output voltages in space-

saving SOT-23-5 and MM8™ 8-lead power MSOP pack-

ages. For higher power requirements see the MIC5209 or

MIC5237.

Features

• Error Flag indicates undervoltage fault

• Guaranteed 500mA-peak output over the full operating

temperature range

• Low 500mV maximum dropout voltage at full load

• Extremely tight load and line regulation

• Tiny SOT-23-5 and MM8™ power MSOP-8 package

• Low-noise output

• Low temperature coefficient

• Current and thermal limiting

• Reversed-battery protection

• CMOS/TTL-compatible enable/shutdown control

• Near-zero shutdown current

Applications

• Laptop, notebook, and palmtop computers

• Cellular telephones and battery-powered equipment

• Consumer and personal electronics

• PC Card V

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

• High-efficiency linear power supplies

Ordering Information

Part Number

Marking

Volts

Junction Temp. Range

Package

MIC5216-3.0BMM

—

3.0V

–40

°C to +125°C

MSOP-8

MIC5216-3.3BMM

—

3.3V

–40

°C to +125°C

MSOP-8

MIC5216-3.6BMM

—

3.6V

–40

°C to +125°C

MSOP-8

MIC5216-5.0BMM

—

5.0V

–40

°C to +125°C

MSOP-8

MIC5216-3.0BM5

LH30

3.0V

–40

°C to +125°C

SOT-23-5

MIC5216-3.3BM5

LH33

3.3V

–40

°C to +125°C

SOT-23-5

MIC5216-3.6BM5

LH36

3.6V

–40

°C to +125°C

SOT-23-5

MIC5216-5.0BM5

LH50

5.0V

–40

°C to +125°C

SOT-23-5

1

2

3

4

8

7

6

5

MIC5216-5.0BMM

1.0µF

tantalum

5V

6V

100k

Flag

5V Low-Noise Regulator

15

2

34

1.0µF

tantalum

3.3V

MIC5216-3.3BM5

4V

ENABLE

SHUTDOWN

Flag

100k

3.3V Low-Noise Regulator

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