MPQ2143H

3A, 5.5V, 2.0MHz

Synchronous Step Down Switcher

MPQ2143H Rev. 1.0

www.MonolithicPower.com

1

8/12/2016

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

© 2016 MPS. All Rights Reserved.

DESCRIPTION

The MPQ2143H is a monolithic, step-down,

switch-mode converter

with

internal

power

MOSFETs. It can achieve up to 3A continuous

output current from a 2.5V to 5.5V input voltage

with excellent load and line regulation. The

output voltage can be regulated as low as 0.6V.

Constant-on-time control provides fast transient

response and eases loop stabilization. Fault-

condition

protections

include

cycle-by-cycle

current limiting and thermal shutdown.

The MPQ2143H is available in small QFN-10

package and requires only a minimal number of

readily-available standard external components.

The MPQ2143H is ideal for a wide range of

applications including high-performance DSPs,

FPGAs, and portable instruments.

FEATURES

 Wide 2.5V to 5.5V Operating Input Range

 Output Voltage as Low as 0.6V

 100% Duty Cycle in Dropout

 Up to 3A Output Current

 80mΩ and 40mΩ Internal Power MOSFET

Switches

 Default 2.0MHz Switching Frequency

 EN and Power-Good for Power Sequencing

 Cycle-by-Cycle Over-Current Protection

 Auto Discharge at Power Off

 Short-Circuit Protect with Hiccup Mode

 Stable with Low-ESR Output Ceramic

Capacitors

 Available in QFN-10 (2mmx3mm) Package

APPLICATIONS

 Low Voltage I/O System Power

 Handheld/Battery-powered Systems

 Wireless/Networking Cards

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

GND

FB

VIN

EN

SW

C2

R1

R2

EN

OUT

L1

U1

MPQ2143H

PG

PG

VIN

VOUT

C1