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Voltage regulators target netcom, server, storage apps

06 Jul 2012

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International Rectifier (IR) has announced its third generation of integrated, feature-rich SupIRBuck synchronous buck voltage regulators aimed at energy efficient netcom, server and storage applications. The SupIRBuck single output devices have a newly patented modulator scheme that generates the industry's smallest, jitter free pulse widths, the company boasted.

The ability to generate narrow pulses coupled with robust source/sync current handling capability makes this family ideal for generating DDR memory termination voltage directly from 12Vin. The devices likewise feature switching frequency up to 1.5MHz, pre-biased startup, input voltage aware enable, tracking and programmable power-good.

The SupIRBuck flaunts a reference voltage accuracy of 0.5 percent, enhanced line/load regulation with input voltage feed-forward and thermal compenzation for current limit. Other enhancements include analog input for margining, PLL for smooth external frequency synchronization, start/stop ramp and minimum input voltage of 1V.

The IR3894 and IR3895 SupIRBuck voltage regulators and trackers integrate IR's latest generation high performance controller with�power MOSFETs in a slim PQFN 5 x 6mm package, and deliver 12A and 16A output current respectively to achieve more than 96 percent peak efficiency. The IR3897, IR3898 and IR3899 deliver 4A, 6A and 9A respectively in a 4 x 5mm package. These are ideal for low duty cycle single input applications, from 5V or 6.8V to 21V with operating junction temperatures of -40°C to 125°C. The common footprint of the devices provides design flexibility and allows cut-and-paste layout for fast time-to-market.

Production orders are available.

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