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Edge Computing Leverages Modular Power in Scalable Micro Data Centres - May 2022
Edge computing is essential to realizing the full potential of artificial intelligence (AI), machine learning and internet of things (IoT). These technologies are being infused into every corner of...
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Regulator meets conversion efficiency for cloud equipment

As rack-mount systems increase in complexity, improved voltage conversion efficiency shows savings in energy consumption, thermal management and equipment size. Cloud-based equipment and RAID systems, where 3.3V is preferred as the main power distribution rail, are placing demands on system power conversion, which are met by the LTM4639. This is a 20A DC/DC step-down μModule regulator from Linear Technology, capable of converting 2.5 to 7V main-power system rails to point-of-load voltages as low as 0.6V.

The regulator includes the inductor, MOSFETs, DC/DC controller and compensation circuitry in a 4.92mm height BGA package which has a 15 x 15mm footprint. For 3.3V input to 1.5V output conversion at 20A load, efficiency is 88%, power loss is 3.9W, says the company. Junction temperature rise above ambient temperature is 37°C. The regulator provides total DC error of maximum ±1.5%, guaranteed from -40 to 125°C.  Up to four devices can be paralleled for up to 80A output while operating out-of-phase to reduce the number of input and output capacitors.

The input supply ranges from 2.375V to 7V. (For operation from 3.3V and below, a 5V low power auxiliary supply is needed to bias internal circuitry.)

 

 



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