Faster Low On-Resistance LITTLE FOOT Power MOSFETs Boost Efficiency in Notebook Computer and CPU Point-of-Use Power Conversion Circuits

SANTA CLARA, CALIFORNIA - April 19, 1999 - Three new power MOSFETs with greatly improved specifications for notebook computer and CPU point-of-use dc-to-dc conversion applications were released today by Vishay Siliconix. The new PWM-optimized LITTLE FOOT devices combine lower on-resistance and gate charge specifications with record switching speeds, which together ensure maximum efficiency in power conversion circuits across all typical load ranges.

The three n-channel devices released today allow designers to choose the best combination of on-resistance, gate charge, and switching speeds for their applications. For designs with higher load currents, the Si4880DY offers on-resistance of 8.5 mW at a 10-V gate drive, with gate charge of just 19.5 nC and turn-off times of 46 ns. For designs that require the fastest possible switching, the Si4800DY offers turn-off times of 22 ns - a record for this type of device - with on-resistance of 18.5 mW and gate charge of 8.7 nC. For designs between these extremes, the Si4890DY offers on-resistance of 12 mW , gate charge of 14 nC, and 35-ns turn-off times.

"Each of these new devices, which are built on the same improved technology, offer a different combination of specifications," said Evan Lambka, Product Marketing Manager at Vishay Siliconix, "and are state-of-the-art solutions suited for varying load and size requirements."

Packaged in the LITTLE FOOT SO-8, samples and production quantities of the Si4880DY, Si4800DY, and Si4890DY are available now, with lead times of 8 to 10 weeks for larger orders.

Vishay Intertechnology, Inc., a Fortune 1,000 Company listed on the NYSE (VSH), is one of the world's largest manufacturers of discrete semiconductors (diodes, rectifiers, transistors, and optoelectronics and selected ICs) and passive electronic components (resistors, capacitors, inductors, sensors, and transducers). These components are used in virtually all types of electronic devices and equipment, in the industrial, computing, automotive, consumer, telecommunications, military, aerospace, and medical markets. Its product innovations, successful acquisition strategy, and ability to provide "one-stop shop" service have made Vishay a global industry leader. Vishay can be found on the Internet at http://www.vishay.com.