IR's Innovative Power Block Devices Deliver Industry Leading Power Density for DC-DC Synchronous Buc


IR's Innovative Power Block Devices Deliver Industry Leading Power Density for DC-DC Synchronous Buck Applications

EL SEGUNDO, Calif.--(BUSINESS WIRE)-- International Rectifier, IR® (NYS: IRF) , a world leader in power management technology, today announced the introduction of the IRFH4251D and IRFH4253D, the first of a family ofinnovative power block devices for DC-DC synchronous buck applications including advanced telecom and netcom equipment, servers, graphic cards, desktop, UltrabookTM and notebook computers.

The 25V IRFH4251D and IRFH4253D feature IR's latest generation silicon in a novel package that delivers benchmark power density in a 5x6 mm PQFN. The new power block devices feature an integrated monolithic FETKY®, and innovative package employing a leading-edge flipped-die technology that enables efficient dissipation of the heat from the source of the synchronous MOSFET directly to the ground layers of the PCB. As a result of improved thermal performance and increased power density, one of the new 5x6 dual devices may replace two 5x6 standard single devices. The new package also utilizes IR's proprietary single copper clip already employed in PowIRStage® and SupIRBuck® products, as well as an optimized layout that significantly reduces stray inductance to lower peak ringing. This allows the designer the option to use 25V MOSFETs in place of less efficient 30V devices.

"With its best-in-class silicon, and innovative features and packaging, the IRFH4251D and IRFH4253D power block devices offer industry leading power density for high performance DC-DC switching applications," said Stephane Ernoux, Director of Marketing, IR's Power Management Devices Business Unit. "The devices employ a more efficient layout that will define the new industry standard for DC-DC dual MOSFETs," he added.

Optimized for 5V gate drive applications, the IRFH4251D and IRFH4253D work with any controller or driver to offer design flexibility while delivering higher current, efficiency and frequency capability in a small footprint compared to alternative approaches using two discrete 30V power MOSFETs.

More information is available on the International Rectifier website at

Availability and Pricing

Pricing for the IRFH4253D and IRFH4251D begins at US $0.89 and US $1.29 respectively in 10,000-unit quantities. Production orders are available immediately. Prices are subject to change.

About International Rectifier

International Rectifier (NYS: IRF) is a world leader in power management technology. IR's analog and mixed signal ICs, advanced circuit devices, integrated power systems and components enable high performance computing and reduce energy waste from motors, the world's single largest consumer of electricity. Leading manufacturers of computers, energy efficient appliances, lighting, automobiles, satellites, aircraft and defense systems rely on IR's power management benchmarks to power their next generation products. For more information, go to

Legal Notice

FETKY®, PowIRStage®, SupIRBuck® andIR® are registered trademarks of International Rectifier Corporation. All other product names noted herein may be trademarks of their respective holders. The proprietary copper clip technology is covered by certain U.S. patents, including but not limited to U.S. Patent Nos. 6,946,740 and 6,040,626.

International Rectifier
Sian Cummins, 1-310-252-7148

KEYWORDS: United States North America California


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