Monolithic Power Systems MP2149

Description

The MP2149 is an internally-compensated, 1MHz fixed-frequency, dual PWM, synchronous, step-down regulator. The MP2149 operates from a 2.7V-to-6V input, generates an output voltage as low as 0.608V, and has a 45μAquiescent current that makes it ideal for powering portable equipment that runs on a single cell lithium-ion (Li+) battery.

The MP2149 integrates dual 100mΩ high-side switches and 40mΩ synchronous rectifiers for high efficiency without an external Schottkydiode. Peak-current mode control and internal compensation limits the minimum number of readily-available external components.

Fault-condition protections include cycle-by-cycle current limiting and thermal shutdown.

The MP2149 is available in an 8-pin TSOT23-8 package.

Features

• Dual 1A-Output Current

• 93% Peak Efficiency

• 80% Light-Load Efficiency

• Wide 2.7V-to-6V Operating Input Range
• 100mΩ and 40mΩ Internal Power MOSFET
• 1MHz Fixed Switching Frequency
• Adjustable Output from 0.608V to VIN
• 180° Phase-Shifted Operation
• 100% Duty-Cycle Operation
• 45μA Quiescent Current
• Cycle-by-Cycle Over-Current Protection
• Short-Circuit Protection with Hiccup Mode
• Thermal Shutdown
• Available in an 8-pin TSOT23-8 Package

Typical applications

• Battery-Powered Devices
• Smartphones and Feature Phones
• Small/Handhold Devices
• DVD Drivers
• Portable Instruments

More information

• Datasheet
• IC product information