August 2003

1

MIC5233

MIC5233

Micrel

MIC5233

High Input Voltage, Low IQ

General Description

The MIC5233 is a 100mA 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 MIC5233 ideal for multi-cell Li-Ion battery

systems.

A

µCap LDO design, the MIC5233 is stable with either

ceramic or tantalum output capacitor. It only requires a 2.2

µF

capacitor for stability.

Features of the MIC5233 include enable input, thermal shut-

down, current limit, reverse battery protection, and

reverse leakage protection.

Available in fixed and adjustable output voltage versions, the

MIC5233 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 36V

• Ultra low ground current: 18

µA

• Low dropout voltage of 270mV at 100mA

• High output accuracy of

±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

• Keep-alive supply in notebook and portable computers

• USB power supply

• Logic supply for high-voltage batteries

• Automotive electronics

• Battery powered systems

• 3-4 cell Li-Ion battery input range

Typical Application

15

2

34

ceramic

EN

MIC5233BM5

OFF ON

Ultra-Low Current Adjustable Regulator Application

Ordering Information

Part Number

Marking

Voltage

Junction Temp. Range

Package

MIC5233-1.8BM5

L318

1.8V

–40

°C to +125°C

SOT-23-5

MIC5233-2.5BM5

L325

2.5V

–40

°C to +125°C

SOT-23-5

MIC5233-3.0BM5

L330

3.0V

–40

°C to +125°C

SOT-23-5

MIC5233-3.3BM5

L333

3.3V

–40

°C to +125°C

SOT-23-5

MIC5233-5.0BM5

L350

5.0V

–40

°C to +125°C

SOT-23-5

MIC5233BM5

L3AA

ADJ.

–40

°C to +125°C

SOT-23-5

10

15

20

25

30

35

40

4

8 12 16 20 24 28 32 36 40

INPUT VOLTAGE (V)

I

I

I

Ground Current vs. Input Voltage