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Buck regulator powers GPUs in Intel Santa Rosa platforms

Posted: 10 Mar 2006 ?? ?Print Version ?Bookmark and Share

Keywords:ISL6263? buck voltage regulator? Intersil?

ISL6263 buck voltage regulator

Intersil Corp. introduced the ISL6263 single-phase buck voltage regulator that powers next-generation graphics processing units (GPUs) or graphics cores used on Intel's Santa Rosa platforms. The device aims to reduce power consumption and enhances the performance of the GPU by changing output voltage and operation modes corresponding to the advanced GPU control protocol.

The modulator at the heart of this power system is created using Intersil's patented R3 (Robust Ripple Regulator) technology. Intersil claims that the R3-based converter provides better transient response and efficiency, and is capable of changing the voltage output when the GPU is in suspend or sleep mode.

The ISL6263 5bit VID (voltage identification) regulator provides 0.5 percent system accuracy over the entire temperature range, which is said to allow wider tolerance of inductors for platforms using DC resistance current sensing. To boost battery life, the controller has the flexibility to go to lower switching frequency at discontinuous conduction mode either through internal automatic inductor current sensing or programmed by VID.

Among the product's key features are: a single-phase core voltage regulator; internal gate driver with 2A driving capability; microprocessor voltage identification input; 0.4120V to 1.2875V in 25.75mV steps; supports VID changes on the fly; user-programmable switching frequency; programmable DCM operation controlled by VID or through internal inductor current sensing; and differential remote voltage sensing.

According to Intersil, the regulator targets applications such as notebooks, LCD PC systems, storage-area networks or network-attached storage systems and Blade servers.

The ISL6263 is available now in a 32-lead thin QFN package and is priced at $2.70 in 1,000-unit quantities.

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