Monolithic Power Systems MP2249

Description

The MP2249 is a 1MHz constant frequency,current mode, PWM step-down converter. The device integrates a main switch and a synchronous rectifier for high efficiency and eliminates the need for an external Schottky diode. It is ideal for powering portable equipment that runs from a single cell Lithium- Ion (Li+) battery.

The MP2249 can supply 3A of load current from a 2.5V to 6V input voltage. It can run at 100% duty cycle for low dropout applications. The MP2249 provides internal soft-start control to reduce rush current and output discharge function to control discharging of the output capacitor.

The MP2249 is available in small 3mmx3mm TQFN10 or SOIC8E package.

Features

• High Efficiency: Up to 90%
• Power Save Mode at Light Load
• 1MHz Constant Switching Frequency
• Up to 4.5A Peak Current
• 2.5V to 6V Input Voltage Range
• Output Adjustable from 0.6V to VIN
• 100% Duty Cycle in Dropout
• Output Discharge Function
• Internal Soft-Start Control
• Power Good Indicator
• Short Circuit Protection
• Thermal Fault Protection
• Available in 3mmx3mm TQFN10 or SOIC8E Package

Typical applications

• Portable Instruments
• MP3 Players
• Microprocessors and DSP Core Supplies
• Cellular Phones
• PDAs
• Smart Phones
• Digital Still and Video Cameras

More information

• Datasheet
• IC product information