Vishay’s New Common-Drain MICRO FOOT Power MOSFETs

SANTA CLARA, CA (PRWEB) August 11, 2004

Two new common-drain, chipscale power MOSFETs that are the industry’s first such p-channel and 30-V n-channel devices were announced today by Siliconix incorporated (NASDAQ: SILI), an 80.4%-owned subsidiary of Vishay Intertechnology, Inc. (NYSE: VSH).

Available in the compact 1.6 mm by 2.4 mm chipscale format with a 0.65 mm height profile, the new bi-directional Vishay Siliconix MICRO FOOT power MOSFET are 81% smaller than TSSOP 8 devices, yet provide similar on-resistance values and better thermal performance.

The 20-V Si8901EDB offers ultra-low effective on-resistance of 0.030 Ohm enabled by Vishay Siliconix’s TrenchFET® MOSFET technology. Providing a significant size reduction for lithium-ion and lithium-polymer smart battery packs in portable devices that presently use dual p channel SO-8 or TSSOP-8 MOSFETs, the Si8901EDB can be used to shrink the battery pack circuit considerably or to increase cell volume and hence prolong battery life.

The 30-V Si8904EDB is a compact solution for battery packs used in portable devices with a traditional common-drain n-channel configuration. The Si8904EDB extends Vishay’s family of chipscale packaging to include the 30-V value requested by many battery-pack manufacturers today. The new device offers ultra-low on-resistance of 0.0225 Ohm, a value similar to that provided by existing TSSOP-8 or SO-8 devices, but in a significantly smaller footprint.

The 20 V Si8901EDB and 30 V Si8904EDB both will be used for battery-protection modules for single-cell LiB and LiP battery packs in cell phones, PDAs, MP3 players, and digital cameras. With their small dimensions, the new MICRO FOOT devices help to prolong standby and talk times by freeing up space that can be used for a larger battery.

Vishay Siliconix MICRO FOOT devices use a solder bump process along with proprietary techniques developed at Siliconix to eliminate the need for an outer package to encase the power MOSFET die, greatly reducing the size of the devices required to switch power and analog signals in cell phones and other handheld systems while also providing a significant reduction in parasitic inductance.

ESD protection is 6 kV for the Si8901EDB and 4 kV for the Si8904EDB. Both devices are fully electrically tested and delivered in tape-and-reel packaging.

Samples and production quantities of the Si8901EDB and Si8904EDB are available now, with lead times of 10 to 12 weeks for larger orders. Pricing for U.S. delivery is $ 0.65 in 100,000-piece quantities.

Siliconix is a leading manufacturer of power MOSFETs, power ICs, analog switches, and multiplexers for computers, cell phones, fixed communications networks, automobiles, and other consumer and industrial electronic systems. With 2003 worldwide sales of $ 392.1 million, the Company’s facilities include a Class 1 wafer fab dedicated to the manufacture of power products in Santa Clara, California, and an affiliated Class 1 wafer fab located in Itzehoe, Germany. The Company’s products are also fabricated by subcontractors in Japan, Germany, China, Taiwan, and the United States. Assembly and test facilities include a company-owned facility in Taiwan, a joint venture in Shanghai, China, and subcontractors in the Philippines, China, Taiwan, and Israel.

Vishay, a Fortune 1,000 Company listed on the NYSE, is one of the world’s largest manufacturers of discrete semiconductors (diodes, rectifiers, transistors, optoelectronics, and selected ICs) and passive electronic components (resistors, capacitors, inductors, and transducers). The Company’s components can be found in products manufactured in a very broad range of industries worldwide. Vishay is headquartered in Malvern, Pennsylvania, and has plants in 17 countries employing over 26,000 people. Vishay can be found on the Internet at

MICRO FOOT and TrenchFET are registered trademarks of Siliconix incorporated

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About The Author

Ibrar Ayyub

Ibrar Ayyub is an experienced technical writer with a Master's degree in computer science from BZU Multan University. He has written for various industries, mainly home automation, and engineering. He has a clear and simple writing style and is skilled in using infographics and diagrams. He is a great researcher and is able to present information in a well-organized and logical manner.

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