MP2159A

Synchronous Step-Down Converter

in 8-pin TSOT23

MP2159A Rev. 1.02

www.MonolithicPower.com

1

6/30/2016

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

© 2016 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP2159A is a monolithic step-down,

switch-mode converter with built-in power

MOSFETs. It achieves a 1 A continuous output

current from a 2.5 V to 6 V input voltage range

with excellent load and line regulation. The

output voltage can be regulated as low as

0.6 V.

The constant-on-time (COT) control scheme

provides fast transient response and eases loop

stabilization. Fault condition protection includes

cycle-by-cycle current limiting and thermal

shutdown.

The MP2159A is available in a small TSOT23-8

package and requires a minimum number of

readily

available,

standard,

external

components.

The MP2159A is ideal for a wide range of

applications including high-performance DSPs,

FPGAs, PDAs, and portable instruments.

FEATURES

 Default 1.5 MHz Switching Frequency

 EN and Power Good for Power Sequencing

 Wide 2.5 V to 6 V Operating Input Range

 Output Adjustable from 0.6 V

 Up to 1 A Output Current

 100% Duty Cycle in Dropout

 120 mΩ and 90 mΩ Internal Power

MOSFET Switches

 Cycle-by-Cycle Over-Current Protection

 Short-Circuit Protection with Hiccup Mode

 Stable with Low ESR Output Ceramic

Capacitors

 Available in a TSOT23-8 Package

APPLICATIONS

 Wireless/Networking Cards

 Portable Instruments

 Battery Powered Devices

 Low Voltage I/O System Power

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

MP2159A

AGND PGND

FB

VIN

C1

10 F

EN

VIN

2.5V to 6V

VOUT

1.2V/ 1A

SW

C2

10 F

R1

200k

R2

200k

PG

EN

PG

OUT

L1

1 H