International Rectifier SupIRBuck voltage regulator range

A third generation of integrated, feature-rich SupIRBuck synchronous buck voltage regulators is designed to address the new requirements of emerging energy-efficient netcom, server and storage applications.

The single output devices feature a modulator that is said to generate the industry’s smallest, jitter-free pulse widths. The ability to generate narrow pulses coupled with robust source/sync current handling capability makes this family suitable for generating DDR memory termination voltage directly from 12 Vin.

In addition to standard features of switching frequency up to 1.5 MHz, pre-biased start-up, input voltage aware enable, tracking and programmable power-good, the  devices offer additional features and improvements to address the needs of telecom, netcom, server and storage users including reference voltage accuracy of 0.5%, enhanced line/load regulation with input voltage feed-forward and thermal compensation for current limit.

Other enhancements include analog input for margining, PLL for smooth external frequency synchronisation, start/stop ramp and minimum input voltage of 1.0.

The IR3894 and IR3895 regulators and trackers integrate the company’s latest generation high-performance controller with power MOSFETs in a slim PQFN package and deliver 12 and 16 A output to achieve more than 96% peak efficiency.

The IR3897, IR3898 and IR3899 deliver 4, 6 and 9 A. These are suitable for low-duty cycle single input applications, from 5 or 6.8 to 21 V with operating junction temperatures of -40 to 125°C.