International Rectifier SupIRBuck point-of-load voltage regulators

International Rectifier has expanded its SupIRBuck family of integrated point-of-load voltage regulators.

The devices, tailored for energy-efficient high-performance server, storage, telecom and netcom applications, offer even greater efficiency and functionality over previous generation devices for energy saving and easy onboard implementation.

The IR3837M, IR3838M and IR3839M SupIRBuck voltage regulators and trackers integrate a high-performance controller with the latest generation IR MOSFETs in a slim 5 x 6 mm PQFN package and deliver 14, 10 and 6 A output to achieve more than 96% peak efficiency.

Offering increased functionality over previous generation devices, new features include single rail input voltage of 4.5 to 16, external reference for margining purposes, internal digital soft-start, and external synchronisation to reduce noise and EMI in multirails systems.

Additionally, the devices are configurable for DDR memory tracking or sequencing, and offer power good output for undervoltage and overvoltage detection with tracking capability to eliminate the numerous external components typically required to implement these functions with alternative solutions.

A ±1% accurate 0.6 V reference in the 0-125°C temperature range is also offered for precise regulation as well as 5 V external bias option to improve light load efficiency.

The devices eliminate the need for traditional dual-stage POL conversion and save energy, size and cost by operating directly from 12 V_in. While optimised for 12 V input voltage, good efficiencies are also achieved in applications with 9.6, 5 or 3.3 V inputs.

As a result of programmable switching frequencies up to 1.5 MHz and a small footprint, the regulators shrink size and cost, in addition to achieving higher power density.