EL SEGUNDO, Calif. October 2003 - International Rectifier, IR® (NYSE: IRF) today introduces the IRU3073 controller IC designed for dual output high performance DC-DC converters. This versatile device is designed for a wide range of compact, high performance synchronous buck regulator applications used in DDR memory circuits, computer graphics cards, desktop and server motherboards.

The integrated low dropout (LDO) controller enables a second output voltage using a single external MOSFET rather than a second circuit, such as another LDO controller. The IRU3073 operates with single supply 5V or 12V input voltage applications. Both low- and high-side drivers can be biased separately, eliminating external components for charge pump circuitry for 5V applications when a 12V bias voltage is available.

The IRU3073 is a synchronous PWM controller with programmable switching frequency from 200kHz to 400kHz, capacitor-programmable soft-start, an uncommitted error amplifier for DDR voltage tracking applications and a 0.8V precision voltage reference for converters with low output voltages.

The IRU3073 monitors the synchronous MOSFET on-resistance for over-current protection, enhancing converter efficiency and reducing cost by eliminating the current sense resistor.

Dave Priscak, Manager, Computing Products at International Rectifier said, "The new IRU3073 is ideal for dual output voltage applications where size is a major factor, such as graphics cards and motherboards. The LDO controller allows the designer flexibility in addressing various power configurations."

Availability and Pricing

The new IRU3073 controller IC is packaged in the 16-pin QSOP package, and is available immediately. Pricing is US$0.70 each in 1,000-unit quantities. Go to Die Products Home Page for information on die product availability.

High Resolution JPEGs are available in the Press Room.