Fairchild Semiconductor provides designers of cell phones, datacards and netbooks a 6MHz synchronous Buck regulator that delivers high efficiency in a compact and razor-thin footprint.

Higher switching frequencies typically lead to lower efficiencies. However, the FAN5361's carefully optimized design mitigates these losses leading to 91% peak efficiency. The device has a light load efficiency at 82% at 1mA load current. By reducing wasted energy, this synchronous DC/DC step-down converter enables longer battery life and less heat dissipation in portable applications that continually strive to accommodate rich functionality.

The FAN5361, a 6MHz 600mA Buck regulator, allows the use of tiny 470nH chip inductors and 0402 case size input and output capacitors.

Compatibility with these passive components allows system designers to pick chip inductors and capacitors that consume less board space at a lower cost, resulting in smaller and more affordable end applications. This DC/DC converter is packaged in a 0.99 X 1.39mm WL-CSP package with a sleek, low profile of 0.6mm, conserving board space for these space-constrained applications. 

This product uses a proprietary ultra-fast architecture offering robust transient response while consuming very low quiescent current, making the application more resilient to sudden fluctuations in processor or I/O loads. 

This system operates at input voltages ranging from 2.3V to 5.5V, meeting the requirements for today’s single Li-Ion and multiple alkaline/NiMH cell applications. Fixed output voltage options are available ranging from 1.0V to 1.82V.

Price (each, 1000 pcs.): $0.78; delivery: 12 weeks ARO

More information: http://www.fairchildsemi.com