Product Descriptions

The NB634 is a high efficiency synchronous rectified step-down switch mode converter with built-in internal power MOSFETs. It offers a very compact solution to achieve 5A continuous output current over a wide input supply range with excellent load and line regulation. The NB634 operates at high efficiency over a wide output current load range.

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

Full protection features include latch-off OCP and thermal shut down.

The NB634 requires a minimum number of readily available standard external components and is available in a space saving QFN14 (3mm x 4mm) package.

Product Features

 Wide 4.5V to 24V Operating Input Range

 5A Output Current

 Low RDS(ON) Internal Power MOSFETs

 Proprietary Switching Loss Reduction Technique

 Fixed 500kHz Switching Frequency

 Sync from 300kHz to 2MHz External Clock

 Internal Compensation

 Latch-off OCP Protection and Thermal Shutdown

 Output Adjustable from 0.8V

 Available in a QFN14 (3mmx4mm) Package

Product Applications

 Notebook Systems and I/O Power

 Networking Systems

 Digital Set Top Boxes

 Personal Video Recorders

 Flat Panel Television and Monitors

 Distributed Power Systems 

Product Photos

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