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Voltage regulators boast up to 96% efficiency

Posted: 16 Feb 2010 ?? ?Print Version ?Bookmark and Share

Keywords:voltage regulator? MOSFET? point-of-load?

Gen2.1 SupIRBuck regulators

International Rectifier has expanded its SupIRBuck family of integrated point-of-load (POL) voltage regulators for energy-efficient, high-performance server, storage and netcom applications.

The Gen2.1 SupIRBuck family features IR's latest advances in control IC, MOSFET and package integration technologies to deliver up to 12A output current in a low-profile, thermally-enhanced 5mm x 6mm Power QFN package. Capable of handling input voltages as wide as 1.5V to 16V, the new family of integrated voltage regulators is designed to deliver output voltages from 0.7V to 90 percent of the input voltage with benchmark efficiency over the entire load range and peak efficiency greater than 96 percent. As a result of delivering programmable switching frequencies up to 1.5MHz, the devices shrink board size as well as achieving high power density.

The Gen2.1 family eliminates the need for traditional dual stage POL conversion by operating directly from 12V, and while optimized for 12V input voltage, superior efficiencies are also achieved in applications with 9.6-, 5- or 3.3V input voltages. In addition to providing pin-compatible current options from 2A to 12A, the Gen2.1 SupIRBuck devices offer new power good output window comparator for over-voltage and under-voltage detection, shorter deadtime to reduce power losses and more precise over-current limit.

"The Gen2.1 SupIRBuck family has been enhanced, offering more features, better performance and new current options while maintaining the same 5mm x 6mm QFN package," said Cecilia Contenti, product marketing manager, POL group, IR's enterprise power business unit. "The improved functionality and programmability make these Gen2.1 devices a full-featured, high-performance compact solution for server, storage and netcom applications allowing easy on-board implementation for fast time to market," she added.

Additional features include 1 percent accurate 0.7V reference voltage, programmable hiccup current limit, programmable soft start, enhanced pre-bias start up, thermal protection, enable pin with voltage monitoring capability, sequencing (IR384xW), DDR memory tracking (IR383xW), and -40C to 125C operating junction temperature.

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