Monolithic Power Systems MP2159

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 outputvoltage 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

• Very Low IQ: 17μA
• 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

Typical applications

• Networking Cards
• Portable Instruments
• Low Voltage I/O System Power
• Battery Powered Devices
• Wireless Cards

More information

• Datasheet
• IC product information