POWER BLOCK DEVICES FOR DCDC SYNC BUCK APPLICATIONS
POWER BLOCK DEVICES FOR DC-DC SYNC BUCK APPLICATIONS The IRFH 4251 D and IRFH 4253 D are 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. HOMEPAGE DATASHEETS Advantages • The 25 V IRFH 4251 D and IRFH 4253 D feature IR’s latest • Features • Control and synchronous MOSFETs in one package • Low charge control MOSFET • Low RDS(on) synchronous MOSFET • Intrinsic Schottky Diode with low forward voltage • Scalable platform allows 35 A or 45 A devices in the same package footprint • Ro. HS Compliant • MSL 2, Industrial Qualification • • generation silicon in a novel package that delivers benchmark power density in a 5 x 6 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 5 x 6 dual devices may replace two 5 x 6 standard single devices. The new package also utilizes IR’s proprietary single copper clip already employed in Pow. IRStage® and Sup. IRBuck® products as well as an optimized layout that significantly reduces stray inductance to lower peak ringing which allows the designer the option of using 25 V MOSFETs in place of less efficient 30 V devices. PRESS RELEASE HI-RES GRAPHIC August 2013
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