MP2144

Synchronous Step Down Switcher

MP2144 Rev. 1.03

www.MonolithicPower.com

1

12/20/2012

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

© 2012 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP2144 is a monolithic, step-down, switch-

mode converter with internal power MOSFETs.

It can achieve up to 2A continuous output

current from a 2.5V–to-5.5V input voltage with

excellent load and line regulation. The output

voltage can be regulated to as low as 0.6V.

The constant-on-time control scheme provides

fast transient response and eases loop

stabilization. Fault condition protections include

cycle-by-cycle current limiting and thermal

shutdown.

The MP2144 is available in small TSOT23-8

package and requires only a minimal number of

readily available standard external components.

The MP2144 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 2A Output Current

• Low IQ: 40µA

• 90mΩ and 60mΩ 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 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

MP2144

GND

FB

VIN

C1

10 F

EN

VIN

2.5V to 5.5V

VOUT

1.2V/2A

SW

C2

10

3

2

8

1

5

R1

200

R2

200k

PG

EN

PG

4,6

OUT

7

L1

1

0

10

20

30

40

50

60

70

80

90

100

0.001

0.01

0.1

1

10