MP2159

Synchronous Step Down Switcher

In 8-pin TSOT23

MP2159 Rev. 1.03

www.MonolithicPower.com

1

9/6/2013

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© 2013 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP2159 is a monolithic step-down switch

mode converter with built-in internal power

MOSFETs. It achieves 1A continuous output

current from a 2.5V to 6V input voltage with

excellent load and line regulation. The output

voltage can be regulated as low as 0.6V.

The

Constant-On-Time

control

scheme

provides fast transient response and eases loop

stabilization. Fault condition protection includes

cycle-by-cycle current limiting and thermal

shutdown.

The MP2159 is available in the small TSOT23-8

package and requires a minimum number of

readily available standard external components.

The MP2159 is ideal for a wide range of

applications including High Performance DSPs,

FPGAs, PDAs, and portable instruments.

FEATURES

• Default 1.5MHz Switching Frequency

• EN and Power Good for Power Sequencing

• Wide 2.5V to 6V Operating Input Range

Output Adjustable from 0.6V

• Up to 1A Output Current

• 100% Duty Cycle in Dropout

• 118mΩ and 88mΩ Internal Power MOSFET

Switches

• Cycle-by-Cycle Over Current Protection

• Short Circuit Protect 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 and adhere to the RoHS directive. For MPS green

status, please visit MPS website under Products, Quality Assurance page.

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

Monolithic Power Systems, Inc.

TYPICAL APPLICATION