DESCRIPTION

The MP3120 is a high efficiency synchronous, current mode step-up converter. The device can boost a single cell or two cells AA battery up to 5V.

The MP3120 can start up from an input voltage as low as 0.8V and provide in-rush current limiting as well as output short circuit protection. The integrated P-Channel synchronous rectified switch provides improved efficiency and eliminates the need of an external schottky diode. The P-MOS will disconnect the output from the input when EN is low. This output disconnect feature allows the output to be completely discharged, thus allowing the part to draw less than 1uA off current in shutdown mode.

The 1.1MHz switching frequency allows for smaller external components; the internal compensation and soft start minimize the external component count, all helps to produce a compact solution for a wide range of load current.

The MP3120 features an integrated power MOSFET that supports up to 5V output and a typical 1.2A switch current.

The device also can maintain the output voltage regulated even when the input voltage is above the output voltage.

The MP3120 is offered in a 6-lead ThinSOT23 package

FEATURES

 Up to 96% Efficiency

 True Output Disconnect from Input

 Inrush Current Limiting and Internal Soft-Start

 0.8V Low Voltage Start-Up

 Internal Synchronous Rectifier

 Current Mode Control with Internal Compensation

 Short-Circuit Protection

 1.1MHz Fixed Frequency Switching

 0.8V to 5V Input Range

 2.5V to 5V Output Range

 Tiny External Components

 Small 6-lead ThinSOT Package

APPLICATION

 Single-cell, Two-cell and Three-cell Alkaline, NiCd or NiMH or single-cell Li Battery Consumer Products

 MP3 Players

 Wireless Mouse

 Audio Recorders