General Description

The MIC5225 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 MIC5225 ideal for a wide variety of applications including USB and portable electronics applications, using 1-cell, 2-cell or 3-cell Li-Ion battery inputs.

A µCap LDO design, the MIC5225 is stable with either a ceramic or tantalum output capacitor. It only requires a 2.2µF capacitor for stability.

Features of the MIC5225 includes enable input, thermal shutdown, current limit, reverse battery protection, and reverse leakage protection.

Available in fixed and adjustable output voltage versions, the MIC5225 is offered in the IttyBitty® SOT23-5 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.

Features

• Wide input voltage range: 2.3V to 16V

• High output accuracy of ±2.0% over temperature

• Guaranteed 150mA output

• Very low ground current: 29µA

• Low dropout voltage of 310mV at 150mA

• µCap: Stable with ceramic or tantalum capacitors

• Excellent line and load regulation specifications

• Reverse battery protection

• Reverse leakage protection

• Zero shutdown current

• Thermal shutdown and current limit protection

• IttyBitty® SOT23-5 Package

Applications

• Cellular phones

• Keep alive supply in notebook and portable computers

• Battery-powered equipment

• Consumer/personal electronics

• High-efficiency linear power supplies

• Automotive electronics