Monolithic Power Systems MP3423

Description

The MP3423 is a high-efficiency, synchronous, current-mode, step-up converter with output disconnect.

The MP3423 can start up from an input voltage as low as 1.9V while provide inrush current limiting, and output short-circuit protection. The integrated, P-channel, synchronous rectifier improves efficiency and eliminates the need for an external Schottky diode. The PMOS disconnects the output from the input when the part shuts down.

The 600kHz switching frequency allows for small external components, while the internal compensation and the soft-start minimize the external component count. MP3423 provides small size solution for 5V/3.1A load from a supply voltage down to 2.8V.

The MP3423 is available in 14-pin QFN 2mmx2mm package.

Features

• 1.9V to 5.5V Input Work Range
• 2.5V to 5.5V Output Range
• Internal Synchronous Rectifier
• 600kHz Fixed Frequency Switching
• 9A Typical Switch Current Limit
• 43uA Quiescent Current
• High Efficiency over Full Load Range
• Internal Soft-start and Compensation
• True Output Load Disconnect from Input
• OCP, SCP, OVP and OTP Protection
• Small QFN-14 (2mmx2mm) Package

Typical applications

• Personal Medical Devices
• Portable Media Players
• Battery-Powered Products
• Handheld Computers and Smart-Phones
• Wireless Peripherals

More information

• Datasheet
• IC product information