EL SEGUNDO, Calif. - International Rectifier, IR®
introduced a new 20V DirectFET™ MOSFET synchronous buck converter chip set. The IRF6610 and IRF6636 small can
DirectFET MOSFET pair has performance similar to a pair of SO-8 MOSFETs with a 40% size reduction. The chip set is
designed for high frequency, point-of-load (POL) designs where size, efficiency and thermal performance are critical
"In 12V computing systems, the IRF6610 and
IRF6636 chip set is ideal for high density , 15A POL converters that support output voltages from 5V to below 1V,"
said Faisal Ahmad, Marketing Manager for DC-DC Computing Products at International Rectifier. "For example, a 500kHz
POL converter delivering 15A output current at 1.5V achieves greater than 88% efficiency with this chip set."
The IRF6610 features very low gate charge of 10nC, minimizing switching losses for an
optimized control FET function. The IRF6636 is a versatile DirectFET power MOSFET with 4.5mOhm device on-resistance
and a low gate charge of 18nC, and can be used as either a synchronous FET for 15A applications when coupled with an
IRF6610, or a as a control FET when used with the IRF6691 for 35A per phase, multi-phase applications. The
IRF6636/IRF6691 chip enables greater density in applications such as POL modules, replacing as many as four
thermally enhanced SO-8 MOSFET devices.
|Part Number||Package||BVDSS(V)||RDS(on) max
@10V(mOhm)||RDS(on) max @4.5V(mOhm)||VGS(V)||ID @
Tc=25ºC(A)||QG typ(nC)||QGD typ(nC)|
International Rectifier's patented DirectFET MOSFET packages
present a whole new set of design advantages not previously delivered by standard plastic discrete packages. Their
metal can construction enables dual-side cooling that effectively doubles the current handling capacity of high
frequency DC-DC buck converters powering advanced microprocessors. In addition, devices in the DirectFET package are
compliant with the Restriction of Hazardous Substances Directive (RoHS).