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MIC37139

1.5A, Low-Voltage µCap LDO Regulator

Micrel 

MIC37139

1.5A, Low-Voltage µCap LDO Regulator

General Description

The Micrel MIC37139 is a 1.5A low-dropout linear voltage

regulator that provides a low-voltage, high-current output

with a minimum of external components. It offers high

precision, ultra-low dropout (500mV overtemperature), and

low ground current.

The MIC37139 operates from an input of 2.25V to 6.0V. It

is designed for a wide variety of applications including

digital circuits requiring low-voltage at high currents (i.e.,

PLDs, DSPs, microcontrollers, etc.). It is available in a

fixed output voltage of 1.8V, and as low as 1.5V.

Features of the MIC37139 LDO include thermal and

current-limit protection, and reverse-current and reverse-

battery protection. It’s junction temperature range of the is

from –40°C to +125°C.

Data sheets and support documentation can be found on

Micrel’s web site at: www.micrel.com.

Features

• 1.5A minimum guaranteed output current

• 500mV maximum dropout voltage over temperature

• Stable with ceramic or tantalum capacitor

• Wide input voltage range: VIN:2.25V to 6.0V

• +1.0% initial output tolerance

• Fixed 1.8V output voltage

• Excellent line and load regulation specifications

• Thermal shutdown and current-limit protection

• Reverse-leakage protection

• Low profile SOT-223 package

Applications

• LDO linear regulator for low-voltage digital IC

• PC add-in cards

• High-efficiency linear power supplies

• SMPS post regulator

• Battery charger

• Set-top boxes

• Digital video recorders

• PowerPC® power supplies

• Multimedia and PC processor supplies

___________________________________________________________________________________________________________

Typical Application

1.8V/1.5A Regulator

Super βeta is a registered trademark of Micrel, Inc

PowerPC is a registered trademark of IBM Corporation.

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

November 2009

M9999-110209

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