MPQ2249

Industrial Grade

6V, 3A, 1MHz, Low-Voltage

Synchronous Step-Down Converter

MPQ2249 Rev.1.01

www.MonolithicPower.com

1

6/11/2014

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

© 2014 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MPQ2249 is a 1MHz constant frequency,

current mode, PWM step-down converter. The

device integrates a main switch and a

synchronous rectifier for high efficiency and

eliminates the need for an external Schottky

diode. It is ideal for powering portable

equipment that runs from a single cell Lithium-

Ion (Li+) battery.

The MPQ2249 can supply 3A of load current

from a 2.5V to 6V input voltage. It can run at

100% duty cycle for low dropout applications.

The MPQ2249 provides internal soft-start

control to reduce rush current and output

discharge function to control discharging of the

output capacitor.

The MPQ2249 is available in small SOIC8E

package.

FEATURES

• High Efficiency: Up to 90%

• Power Save Mode at Light Load

• 1MHz Constant Switching Frequency

• Up to 4.5A PeakCurrent

• 2.5V to 6V Input Voltage Range

• Output Adjustable from 0.6V to VIN

• 100% Duty Cycle in Dropout

• Output Discharge Function

• Internal Soft-Start Control

• Power Good Indicator

•

Short Circuit Protection

• Thermal Fault Protection

• Available in SOIC8E Package

APPLICATIONS

• Cellular and Smart Phones

• Microprocessors and DSP Core Supplies

• PDAs

• MP3 Players

• Digital Still and Video Cameras

• Portable Instruments

All MPS parts are lead-free and adhere to the RoHS directive. For MPS green

status, please visit MPS website under Quality Assurance. “MPS” and “The

Future of Analog IC Technology” are Registered Trademarks of Monolithic

Power Systems, Inc.

TYPICAL APPLICATION

EN

GND

MPQ2249

PVIN

FB

SW

L1

2.2 H

R1

C2

R2

ON OFF

PG

R3

PVIN

PG

C3

C4