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Integrated devices for servers achieve 94.5% efficiency
(Energy Efficiency & Technology Via Acquire Media NewsEdge) International Rectifier (IR) announces the extension of its
PowIRstage family of integrated devices with the introduction of
the IR3551, optimized for use in next-generation servers, desktop
PCs, graphics cards, and communication systems.
Offering a maximum operating point of 50 A, the IR3551 is optimized
for high-end processor and DDR memory multiphase solutions,
offering a peak efficiency of 94.5% at 1.2 V 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, 6 x 5-mm 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, users can now select the best price and
performance solution while eliminating the risk of a board redesign
due to changing requirements. 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 other controller-based inductor DCR
sense methods, according to company sources. 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.
For more information, contact International Rectifier, 233 Kansas St.,
El Segundo, CA 90245. Phone: (310) 252-7105.
© 2012 Penton Media
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