Monolithic Power Systems MPQ28261

Description

The MPQ28261 is a synchronous, rectified, step-down, switch-mode converter with built-in 120mΩ high-side MOSFET and 20mΩ low-sideMOSFET. It offers a very compact solution to achieve a continuous 3A output current over a wide input supply range, with excellent load and line regulation. Its synchronous mode operation increases its efficiency over its output current load range, and uses a fixed 500kHz switching frequency.Current mode operation provides a fast transient response and improves loop stabilization. Full protection features include over-current protection and thermal shut down.The MPQ28261 has an external SS pin to program the soft-start time and power-good signal output.The MPQ28261 requires a minimal number of readily-available standard external components and is available in a space saving 3mmx4mm 14-pin QFN package.

Features

• Wide 4.5V-to-21V Operating Input Range
• 3A Maximum Continuous Output Current
• Integrated 120mΩ High-Side and 20mΩ Low-Side Power MOSFETs
• 1% Reference Voltage Accuracy
• Up to 85% Efficiency (for Drops of 12V to 1.2V)
• Fixed 500kHz Switching Frequency
• External Soft-Start
• PG Output
• OCP and Thermal Shutdown
• Output Adjustable from 0.603V to 18V
• Available in a 3mm x 4mm 14-pin QFN Package.

Typical applications

• DSL Modems
• Cable Modems
• Set-Top Boxes
• Telecom

More information

• Datasheet
• IC product information