International Rectifier (IR), a world leader in power management
technology, has expanded its SupIRBuck family of integrated point-of-load voltage
regulators. The devices offer even greater efficiency and functionality over previous
generation devices for energy saving and easy on-board implementation.
The IR3837M, IR3838M, and IR3839M SupIRBuck voltage regulators
and trackers integrate a high performance controller with latest generation IR MOSFETs
in a slim 5 x 6 mm PQFN package, and deliver 14, 10, and 6 A output current respectively
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 V, external reference for margining purposes, internal digital soft-start,
and external synchronization to reduce noise and EMI in multi-rails systems. Additionally,
the devices are configurable for DDR memory tracking or sequencing, and offer Power
Good output for under-voltage and over-voltage 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 very precise regulation as well as 5 V external
bias option to improve light load efficiency.
