MOSFET Claims Best-In-Class Efficiency

In a 40-pin QFN package measuring 6 mm x 6 mm, the R2J20651NP 35A, integrated driver-MOSFET for CPU and DDR type SDRAM power supplies operates with a switching speed of 200 kHz and delivers 1.8 Vdc from a 5 Vdc input. Reportedly the best available, the device achieves an efficiency of 96.5%. It integrates two high-side/low-side power MOSFETs and a driver circuit and conforms to the Integrated Driver-MOSFET (DrMOS) Specifications, Revision 3.0 from Intel. Output range is from 0.8V to 5.0V. Other features include a temperature-detection function that sends a warning signal when the driver IC’s temperature exceeds 130°C. Available in the first quarter of 2009, sample price is $3.40 each. RENESAS TECHNOLOGY AMERICA INC., San Jose, CA. (408) 382-7407.