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60A regulator boasts high current

Posted: 06 Apr 2011 ?? ?Print Version ?Bookmark and Share

Keywords:voltage regulator? dc/dc converter? IR3550? PowIRstage?

International Rectifier (IR) has introduced the IR3550, the first in a family of integrated PowIRstage products. According to the company, the IR3550 family delivers higher efficiency and better thermal performance than competing solutions. Touting the smallest footprint, the IR3550 simplifies the DC/DC converter design for next-generation high performance servers, storage and communication systems.

The 60A-rated IR3550 simplifies the design and implementation of high current, high performance multiphase buck regulators. The resulting solution allows for fewer phases and lower costs.


The IR3550 reduces dependency on complex thermal management techniques.

The new PowIRstage solution integrates a synchronous buck gate driver, IR's latest-generation control and synchronous MOSFETs, featuring low on-state resistance (RDS(on)) and gate charge, and a Schottky diode into a high density, low profile 6x6x 0.9mm PQFN package. The IR3550 claims superior performance compared to alternative power stage solutions, by achieving up to a 3 percent improvement in electrical efficiency to help reduce overall power losses and heat generation in the system, thereby reducing dependency on complex thermal management techniques and associated costs as well as improving reliability.

The IR3550 is compatible with most analog and digital controllers available on the market today. This provides the designer with the flexibility to select the PWM controller of preference. The PowIRstage solution features an integrated current sense amplifier that achieves accurate signal-to-noise ratios compared to alternative controller-based inductor DCR sensing techniques. IR claims the device achieves the industry's best peak and Thermal Design Current (TDC) electrical efficiencies, with up to 95 percent peak efficiency. The high switching frequency capability of the IR3550 allows for the miniaturization of output inductors and input and output capacitors, reducing overall solution size.

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