Point-of-load voltage regulators achieve 96% efficiency

Point-of-load voltage regulators achieve 96% efficiency

International Rectifier announces the expansion of its SupIRBuck family of integrated point-of-load (POL) voltage regulators. The new devices, tailored for energy-efficient high performance server, storage, telecom, and netcom applications offer 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 A, 10 A, 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 new 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 a 0° to 125° C temperature range is also offered for very precise regulation as well as 5 V external bias option to improve light load efficiency.

The new devices eliminate the need for traditional dual stage POL conversion and save energy, size, and cost by operating directly from 12 Vin. While optimized for 12 V input voltage, superior efficiencies are also achieved in applications with 9.6, 5, or 3.3 V input voltages. As a result of programmable switching frequencies up to 1.5 MHz and small footprint, the new voltage regulators shrink size and cost, in addition to achieving higher power density. Moreover, the common footprint of the devices provides design flexibility and allows cut-and-paste layout for fast time-to-market.

Additional SupIRBuck features include programmable hiccup current limit, enhanced pre-bias start up, thermal protection, enable pin with voltage monitoring capability, and -40° to 125° C operating junction temperature.

For more information, contact International Rectifier, 233 Kansas St., El Segundo, CA 90245. Phone: (310) 252-7105.

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