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MIC5233

High Input Voltage Low IQ µCap LDO Regulator

Micrel 

MIC5233

High Input Voltage

Low IQ µCap LDO Regulator

General Description

Features

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

2.2µF capacitor for stability.

Features of the MIC5233 include enable input, thermal-

shutdown, 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 and

SOT223-3 package with a junction temperature range of

−40°C to +125°C.

Data sheets and support documentation can be found on

Micrel’s web site at: www.micrel.com.

• Wide input voltage range: 2.3V to 36V

• Ultra-low ground current: 18µA

• 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 and SOT-223-3 packages

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

Ultra-Low Current Adjustable Regulator Application

Ground Current vs. Input Voltage

IttyBitty is a registered trademark of Micrel, Inc.

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

July 2012

M9999-071212-B

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