August 2003

1

MIC5235

MIC5235

Micrel

MIC5235

Ultra-Low Quiescent Current, 150mA

General Description

The MIC5235 is a 150mA highly accurate, low dropout

regulator with high input voltage and ultra-low ground current.

This combination of high voltage and low ground current

makes the MIC5235 ideal for USB and portable electronics

applications, using 1-cell, 2-cell or 3-cell Li-Ion battery inputs.

A

µCap LDO design, the MIC5235 is stable with either

ceramic or tantalum output capacitor. It only requires a 2.2

µF

capacitor for stability.

Features of the MIC5235 includes enable input, thermal

shutdown, current limit, reverse battery protection, and

reverse leakage protection.

Available in fixed and adjustable output voltage versions, the

MIC5235 is offered in the IttyBitty™ SOT-23-5 package with

a junction temperature range of –40

°C to +125°C.

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

IttyBitty is a trademark of Micrel, Inc.

Features

• Wide input voltage range: 2.3V to 24V

• Ultra low ground current: 18

µA

• Low dropout voltage: 310mV at 150mA

• High output accuracy:

±2.0% over temperature

•

µCap: stable with ceramic or tantalum capacitors

• Excellent line and load regulation specifications

• Zero shutdown current

• Reverse battery protection

• Reverse leakage protection

• Thermal shutdown and current limit protection

• IttyBitty™ SOT-23-5 package

Applications

• USB power supply

• Cellular phones

• Keep-alive supply in notebook and portable computers

• Logic supply for high-voltage batteries

• Automotive electronics

• Battery powered systems

Typical Application

15

2

34

ceramic

EN

MIC5235BM5

OFF ON

Ultra-Low Current Adjustable Regulator Application

Ordering Information

Part Number

Marking

Voltage

Junction Temp. Range

Package

MIC5235-1.5BM5

L215

1.5V

–40

°C to +125°C

SOT-23-5

MIC5235-1.8BM5

L218

1.8V

–40

°C to +125°C

SOT-23-5

MIC5235-2.5BM5

L225

2.5V

–40

°C to +125°C

SOT-23-5

MIC5235-2.7BM5

L227

2.7V

–40

°C to +125°C

SOT-23-5

MIC5235-3.0BM5

L230

3.0V

–40

°C to +125°C

SOT-23-5

MIC5235-3.3BM5

L233

3.3V

–40

°C to +125°C

SOT-23-5

MIC5235-5.0BM5

L250

5.0V

–40

°C to +125°C

SOT-23-5

MIC5235BM5

L2AA

ADJ.

–40

°C to +125°C

SOT-23-5

Ground Current vs. Input Voltage

10

15

20

25

30

35

40

4

9

14

19

24

INPUT VOLTAGE (V)

I

I

I