EL SEGUNDO, Calif. — May 2006 — International Rectifier, IR® (NYSE: IRF), a world leader in power management technology, today introduced the IRF7835PbF and IRF7836PbF, 30V synchronous buck HEXFET® MOSFETs for DC-DC synchronous point-of-load (POL) converters. The SO-8 synchronous MOSFETs are designed for applications where requirements of small size, high efficiency and improved thermal conduction resulting in increased power density are desired, such as notebook microprocessor power supplies and point-of-load (POL) converters used in high-end servers, as well as advanced telecom and datacom systems.

Reducing total gate charge (Qg) up to 25%, optimizing the body diode losses and maintaining similar RDS(on) performance as previous devices, improves critical light-load efficiency in battery-operated systems by as much as 1.5%.

The new IRF7835PbF targets the latest generation of mobile processors requiring a thermal design current of 35 amps from a two-phase voltage regulator using one control and two synchronous MOSFETs per phase. The device may be used in applications up to 11A per MOSFET. The new IRF7836PbF is designed for power rails using a single control and a single synchronous MOSFET, and may be used in applications up to 9A per MOSFET.

“The new 30V HEXFET devices offer low RDS(on) and Qg, ideally suited for point-of-load synchronous buck converter applications between six and 11 amps per MOSFET. The low conduction losses improve full-load efficiency and thermal performance while the low switching losses help to achieve high efficiency even at light loads,” said Jeff Sherman senior marketing manager of IR’s Portable Computing Solutions.

These devices are RoHS-compliant.

Part Number	BV (V)	VGS (V)	RDS(on) (mOhms) typ/max @ 25 ºC		VTH (V)	QG (nC) @5V VGS	QGS1 (nC)	QGD (nC) @16V VDS	QGS2 (nC)
			VGS=4.5V	VGS=10V
IRF7835PbF	30	±20	4.5 / 5.7	3.6 / 4.5	>1.35	22	5.5	7.2	2.1
IRF7836PbF	30	±20	5.7 / 7.1	4.5 / 5.7	>1.35	18	4.1	5.8	1.5

Availability and Pricing

The new 30V HEXFET MOSFETs are available immediately. Pricing is as follows, in US dollars and 10,000-unit quantities:

IRF7835 synchronous FET: $0.76 each
IRF7836 synchronous FET: $0.65 each

Prices are subject to change.