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Micro DC/DC Converter

Fri, 09/28/2001 - 9:40am
Taiyo Yuden introduces the world's first surface-mountable Micro DC/DC Converter, the latest addition to its popular line of ultra-compact, high-reliability power electronics modules. Under low power output conditions, the unique new Micro DC/DC Converter functions together with the portable or other handheld device's battery to provide a distributed power source that minimizes power loss through supply voltage control of the unit's RF power amplifier circuit. The Micro DC/DC's exceptionally high power output per unit volume (20W/cc) operates so efficiently (up to 85%) that the cell phone, PDA, DSC or other portable/handheld device actually conserves energy. In the case of a cellular telephone — a typical application — this translates to an increase in talk time from 180 to as long as 250 minutes-a 39% improvement.

The Micro DC/DC chip accepts input voltages between 3.0V-5.5V and provides an adjustable output from 0.8 V to 3.0VDC at 350 mA, with a typical output ripple of only 20 mVp-p. The Micro DC/DC Converter is currently available in production quantity in the buck converter only. Engineering samples of four other device configurations-boost 1, boost 2, buck boost and inverting-are available now, and will be in full production next year. The device's ultra compact package typically measures only 5.7 mm (0.225 inches) long by 4.2 mm (0.165 inches) wide by 2.35 mm (0.093 inches) height, maximum.

Taiyo Yuden's advanced materials science and semiconductor mounting technology incorporate precise flip chip bonding with micron level control to achieve extremely small physical packaging, precise high-density component mounting and compatibility with standard tape-and-reel dispensers. Taiyo Yuden's product roadmap for the Micro DC/DC product calls for continued significant miniaturization. Next-generation Micro DC/DC Converters will offer up to a 500% increase in power-to-size ratio (100W/cc) by the third quarter of 2002. An intermediate stage, to be announced in April of next year, will double the power output by volume of today's component to 40W per cubic centimeter.

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