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MOSFET offers high-frequency switching in VRM

Posted: 07 Mar 2007 ?? ?Print Version ?Bookmark and Share

Keywords:MOSFET? DC/DC? buck application? Fairchild? multichip modules?

Fairchild Semiconductor introduced its first model in a suite of FET plus driver multichip modules for use in high-current synchronous buck applications supporting Intel's DrMOS Vcore DC/DC converter standard.

According to the company, the FDMF8700 is a power-stage solution in an 8-by-8mm micro-lead frame package, and saves 50 percent board space compared to discrete component solutions. The layout and size of the switches and driver die are optimized to enable higher-frequency operation and are intended for use in desktop and server VR11.x vCore conversion, high-current DC/DC point-of-load converters and small form factor voltage-regulator modules.

In operation, the high-side MOSFET is optimized for fast switching while the low-side device is optimized for low Rds(on). The arrangement accommodates the low-duty-cycle switching requirements needed to convert the 12V bus to supply the processor core with 1V to 1.2V at up to 30A. The integrated FDMF8700 module provides an additional efficiency gain of 1.5 to 2 percent for peak- and steady-power levels compared to discrete solutions using D-Pak packaging.

Pricing is at $2.50 each in 1,000-piece quantities. Delivery is 8 weeks ARO.

- Emily Gleason

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