MP38115

Ultra Low Voltage, 4A, 5.5V Synchronous

Step-Down Switching Regulator

MP38115 Rev. 0.92

www.MonolithicPower.com

1

8/11/2009

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© 2009 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP38115 is an internally compensated

1.5MHz fixed frequency PWM synchronous

step-down regulator. MP38115 operates from a

1.1V to 5.5V input and generates an output

voltage as low as 0.8V.

The MP38115 integrates a 60mΩ high-side

switch and a 60mΩ synchronous rectifier for

high efficiency without an external Schottky

diode. With peak current mode control and

internal compensation, the MP38115 based

solution delivers a very compact footprint with a

minimum component count.

The MP38115 is available in a small 3mm x

3mm 10-lead QFN package.

FEATURES

• 4A Output Current

• Input Operation Range: 1.1V to 5.5V

• 60mΩ Internal Power MOSFET Switches

• All Ceramic Capacitor Design

• Up to 95% Efficiency

• 1.5MHz Fixed Switching Frequency

• Internal Soft-Start

• Frequency Synchronization Input

• Power Good Output

• Cycle-by-Cycle Current Limiting

• Hiccup Short Circuit Protection

• Thermal Shutdown

• 3mm x 3mm 10-lead QFN Package

APPLICATIONS

• µP/ASIC/DSP/FPGA Core and I/O Supplies

• Printers and LCD TVs

• Network and Telecom Equipment

• Point of Load Regulators

“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of

Monolithic Power Systems, Inc.

TYPICAL APPLICATION

MP38115

BS

IN

FB

SW

EN/SYNC

VCC

GND

1.1V / 4A

1.1V to 5.5V

2.7V to 5.5V

OFF ON