Monolithic Power Systems NB621

Description

The NB621 is a high frequency synchronous rectified step-down switch mode converter with a built in internal high side power MOSFET and integrated LDO. It offers a very compact solution to achieve 8A continuous output current over a wide input, load and line range.

Current mode operation provides fast transient response and eases loop stabilization.

Full protection features include OCP and thermal shut down.

The NB621 requires a minimum number of readily available standard external components and is available in a space saving 4mm x 5mm 28-pin QFN package.

Features

• -Wide 5.5V to 25V Operating Input Range
• -8A Output Current
• -Internal Low RDSON Power MOSFETs
• -Fixed 600kHz switching frequency
• -Sync from 300kHz to 2MHz External Clock
• -Integrated 100mA LDO
• -Internal Compensation
• -Power Good Output
• -Integrated Bootstrap Diode
• -OCP Protection and Thermal Shutdown
• -Output Adjustable from 0.8V to 15V
• -Available in 4mm x 5mm 28-pin QFN package.

Typical applications

• Networking Systems
• Digital Set Top Boxes
• Notebook Systems and I/O Power
• Personal Video Recorders
• Distributed Power Systems
• Flat Panel Television and Monitors

More information

• Datasheet
• IC product information