15 Feb 2012

International Rectifier Extends PowIRstage

International rectifier, IR, has extended its PowIRstage family of power management chips to enhance, as the company states, the scalability and performance for space and thermally constrained computing and consumer applications.

Offering a maximum operating point of 50A, the IR3551 is optimized for high end processor and DDR memory multiphase solutions, offering a peak efficiency of 94.5% at 1.2V output. The new device integrates a synchronous buck gate driver, benchmark figure-of-merit control and synchronous MOSFETs and a Schottky diode into a small, high density, low profile 6x5mm footprint compatible PQFN package.

The IR3551 is footprint compatible with the IR3550 and IR3553. Using a single layout, with the choice of several plug and play PowIRstage products, customers can now select the best price/performance solution while eliminating the risk of a board re-design due to changing requirements.

The IR3551, IR3550 and IR3553 utilize IR’s leading-edge technology in silicon integration, packaging and control techniques to achieve a high current density and high efficiency power stage solution. The PowIRstage devices enable system-level scalability in high current, high efficiency multi-phase configurations. The resulting system solution can in most cases be achieved in less phases and board space versus alternate solutions.

IR’s PowIRstage products also provide an integrated current sense amplifier that achieves superior current sense accuracy and noise immunity compared to best-in-class controller based inductor DCR sense methods. The IR3551, IR3553 and IR3550 are fully PWM compatible with IR’s CHiL digital power control products, as well as most industry standard PWM controllers on the market.

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