January 2003

1

MIC37252

MIC37252

Micrel

MIC37252

2.5A, Low Voltage

Final

General Description

The Micrel MIC37252 is a 2.5A low-dropout linear voltage

regulator that provides a low voltage, high current output with

a minimum of external components. It offers high precision,

low dropout and low ground current.

The MIC37252 operates from an input voltage of 3.0V to

6.0V. It is designed to drive digital circuits requiring low

voltage at high currents (i.e., PLDs, DSP, microcontroller,

etc.). It is available in an adjustable output voltage capable of

1.24V to 5.5V.

Features of the MIC37252 LDO include thermal and current

limit protection, and reverse current and reverse battery

protection.

Junction temperature range of the MIC37252 is from –40

°C

to 125

°C.

For higher currents see the MIC3730x family of LDOs.

Typical Application

VOUT

VIN

ADJ

GND

VEN

47

µF, Ceramic

R1

R2

1.8V

MIC37252

3.3V

Adjustable Regulator

Features

• 2.5A minimum guaranteed output current

• Ideal for 3.3V to 1.8V conversion

• Stable with ceramic or tantalum capacitor

• +2.0% initial output tolerance

• Dropout voltage = 550mV @ 2.5A

• Excellent line and load regulation specifications

• Logic controlled shutdown

• Thermal shutdown and current limit protection

• Reverse-leakage protection

• S-Pak and TO-263 packages

Applications

• LDO linear regulator for low-voltage digital IC

• PC add-in cards

• High efficiency linear power supplies

• SMPS post regulator

• Battery charger

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

SuperSwitcher and Super

βeta PNP are trademarks of Micrel, Inc.