MIC5207

Micrel

January 2000

1

MIC5207

General Description

The MIC5207 is an efficient linear voltage regulator with ultra-

low-noise output, very low dropout voltage (typically 17mV at

light loads and 165mV at 150mA), and very low ground

current (720

µA at 100mA output). The MIC5207 offers better

than 3% initial accuracy.

Designed especially for hand-held, battery-powered devices,

the MIC5207 includes a CMOS or TTL compatible enable/

shutdown control input. When shutdown, power consump-

tion drops nearly to zero.

Key MIC5207 features include a reference bypass pin to

improve its already low-noise performance, reversed-battery

protection, current limiting, and overtemperature shutdown.

The MIC5207 is available in fixed and adjustable output

voltage versions in a small SOT-23-5 package. Contact

Micrel for details.

For low-dropout regulators that are stable with ceramic

output capacitors, see the

µCap MIC5245/6/7 family.

Ordering Information

Part Number*

Marking

Voltage

Junction Temp. Range

Package

MIC5207BM5

LEAA

Adj

–40

°C to +125°C

SOT-23-5

MIC5207-1.8BM5

LE18

1.8

0

°C to +125°C

SOT-23-5

MIC5207-2.5BM5

LE25

2.5

–40

°C to +125°C

SOT-23-5

MIC5207-3.0BM5

LE30

3.0

–40

°C to +125°C

SOT-23-5

MIC5207-3.3BM5

LE33

3.3

–40

°C to +125°C

SOT-23-5

MIC5207-3.6BM5

LE36

3.6

–40

°C to +125°C

SOT-23-5

MIC5207-3.8BM5

LE38

3.8

–40

°C to +125°C

SOT-23-5

MIC5207-4.0BM5

LE40

4.0

–40

°C to +125°C

SOT-23-5

MIC5207-5.0BM5

LE50

5.0

–40

°C to +125°C

SOT-23-5

MIC5207-3.3BZ

—

3.3

–40

°C to +125°C

TO-92

* Other voltages available. Contact Micrel Marketing for information.

Typical Application

15

2

3

4

tantalum

(OPTIONAL)

Enable

Shutdown

Enable

Low-Noise Operation:

MIC5207-x.xBM5

EN (pin 3) may be

connected directly

to IN (pin 1).

Battery-Powered Regulator Application

MIC5207

180mA Low-Noise LDO Regulator

Features

• Ultra-low-noise output

• High output voltage accuracy

• Guaranteed 180mA output

• Low quiescent current

• Low dropout voltage

• Extremely tight load and line regulation

• Very low temperature coefficient

• Current and thermal limiting

• Reverse-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