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

Aug 1, 2013 | Technology Media

EL SEGUNDO, Calif. — International Rectifier, IR® (NYSE: IRF), a world leader in power management technology, today announced the introduction of the IRFH4251D and IRFH4253D, the first of a family of innovative Power Block devices for DC-DC synchronous buck applications including advanced telecom and netcom equipment, servers, graphic cards, desktop, ultrabook 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.

Part Number Package Current Rating
IRFH4251D PQFN 5 X 6 45A
IRFH4253D PQFN 5 X 6 35A

A datasheet is available via the part number links found in the table above.

Press Photos