International Rectifier SupIRBuck voltage regulator family

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 voltage regulators and trackers integrate a high-performance controller with latest-generation IR MOSFETs and deliver 14, 10 and 6 A output current to achieve more than 96% peak efficiency.

Offering increased functionality over previous 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 multi-rails systems.

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 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 Vin. While optimised for 12 V input voltage, efficiencies are also achieved in applications with 9.6, 5 or 3.3 input voltages. As a result of programmable switching frequencies up to 1.5 MHz and small footprint, the regulators shrink size and cost, in addition to achieving higher power density.