MP2143

Synchronous Step Down Switcher

MP2143 Rev. 1.07

www.MonolithicPower.com

1

7/4/2016

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

© 2016 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP2143 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 MP2143 is available in small TSOT23-8

package and requires only a minimal number of

readily-available standard external components.

The MP2143 is ideal for a wide range of

applications including high-performance DSPs,

FPGAs, smartphones, portable instruments,

and DVD drivers.

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 1.2MHz 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 a TSOT23-8 Package

APPLICATIONS

 Low Voltage I/O System Power

 Handheld/Battery-powered Systems

 Wireless/Networking Cards

All MPS parts are lead-free, halogen 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

MP2143

PGND AGND

FB

VIN

C1

10 F

EN

VIN

2.5V to 5.5V

VOUT

1.2V/2A

SW

C2

10 F

R1

200k

R2

200k

PG

EN

PG

OUT

L1

1 H

2

8

1

4

6

7

5

3