MP2143H

3A, 5.5V, 2.0MHz

Synchronous Step Down Switcher

MP2143H Rev. 1.02

www.MonolithicPower.com

1

6/30/2016

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© 2016 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP2143H 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 MP2143H is available in small QFN-10

package and requires only a minimal number of

readily-available standard external components.

The MP2143H 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, halogen-free, and adhere to the RoHS directive.

For MPS green status, please visit the MPS website under Quality Assurance.

“MPS” and “The Future of Analog IC Technology” are registered trademarks of

Monolithic Power Systems, Inc.

TYPICAL APPLICATION

AGND

FB

VIN

EN

SW

C2

R1

R2

EN

OUT

L1

U1

PG

PG

VIN

VOUT

C1

PGND

0

10

20

30

40

50

60

70

80

90

100

0

0.5

1

1.5

2

2.5

3

3.5