MP2120

2.5A, 5.5V Synchronous

Step-Down Switching Regulator

MP2120 Rev. 0.92

www.MonolithicPower.com

1

9/7/2011

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2011 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP2120 is an internally compensated

1.5MHz fixed frequency PWM synchronous

step-down regulator. MP2120 operates from a

2.7V to 5.5V input and generates an output

voltage as low as 0.8V.

The MP2120 integrates an 80mΩ 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 MP2120 based

solution delivers a very compact footprint with a

minimum component count.

The MP2120 is available in a small 3mm x 3mm

10-lead QFN package.

FEATURES

 2.5A Output Current

 Input Operation Range: 2.7V to 5.5V

 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 Trademarks of Monolithic

Power Systems, Inc.

TYPICAL APPLICATION

MP2120

BS

IN

FB

SW

EN/SYNC

POK

GND

1.8V / 2.5

1.2

A

POK

OFF ON

C3

10nF

Efficiency vs.

Output Current

0

70

75

85

90

95

80

0.5

1

1.5

2

2.5

OUTPUT CURRENT (A)

5V to 2.5V

5V to 1.8V 5V to 3.3V