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Integrated DC-DC Regulators Simplify Embedded Power Designs Says IR

29th November 2007

ES Admin

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International Rectifier, has introduced the SupIRBuck family of wide input, single output synchronous buck voltage regulators for high density, high performance data center and consumer applications. The IR38xx SupIRBuck family of point-of-load (POL) voltage regulators integrates IR’s benchmark HEXFET trench technology MOSFETs and a high performance synchronous buck control IC in a compact 5mm by 6mm Power QFN package, shrinking the silicon footprint by 70 percent compared to discrete solutions, and offering between 8 to 10 percent higher full-load efficiency than competing monolithic ICs.

“Because SupIRBuck has a unique, scalable common footprint, designers can simply ‘cut and paste’ their design to significantly reduce risk and enable faster-time-to market,” said Tim Phillips, vice president of IR’s Enterprise Power Business Unit. “The addition of the SupIRBuck POL family to IR’s industry-leading XPhase® and DirectFET® multiphase architecture allows us to provide the most efficient and complete power solution for the data center including enterprise servers,” he added.

Designed for four, seven and 12 amps of output load current at 600kHz switching frequency, the IR38xx operates from a wide input voltage range of between 2.5V to 21V, and provides output voltage as low as 0.6V. Common features include pre-bias start up, fixed 600kHz switching frequency, hiccup current limit, thermal shutdown, and precise output voltage regulation. Optional features include tracking, programmable power good, and 300kHz switching frequency to provide an additional two amps of output current capability. The SupIRBuck family’s thermally enhanced package with slim 0.9mm profile, allows mounting on the backside of the motherboard, making the devices ideally suited for space constrained, high-density server applications.