Micromodule regulator design tackles data centre cooling

November 22, 2018 // By Nick Flaherty
Analog Devices has launched its highest power density DC-DC power regulator module with a design that reduces data centre infrastructure cooling requirements.

Configured as dual 50A or single 100A configuration, the Power by Linear LTM4700 package technology enables an increasing server density and boosts data centre throughout and computational power with minimal impact on system size and cooling costs. The component-on-package design includes onboard memory, data conversion circuitry and digital interface, reducing it to nearly half the size of competing devices. Applications include cloud computing, high-speed computing and optical networking systems, communication infrastructure, and PCIe boards, as well as medical, industrial, and test and measurement equipment.

“Efficient cooling is a crucial issue affecting data centres globally,” said Chris Mann, VP of Power Products at Analog Devices. “Growing demand for higher-throughput, cloud-based computing services is placing a strain on current data centre infrastructures and requires a new approach to thermal dissipation. The LTM4700 effectively addresses this issue, allowing data centre operators to increase the density and performance of their servers.”

The LTM4700 operates at 73°C using ADI's heatsink packaging technology, compared to modular solutions from competitors which typically run at 90°C. The LTM4700 can deliver full 100A at 12VIN to 0.8VOUT with 200 LFM air flow up to 70°C ambient temperature. Peak conversion efficiency at 12VIN to 0.8VOUT reaches 90%.  The µModule’s architecture also enables system designers to combine up to eight devices, delivering up to 800A of load current to meet the higher power needs of data centre processors, including FPGAs, ASICs, GPUs and microcontrollers.

The LTM4700 operates from a 4.5V to 16V input range, with output voltages digitally controlled from 0.5V to 1.8V. Integrated A/D converters, D/A converters and EEPROM enable users to digitally monitor, record and control power parameters using an I²C PMBus interface. Switching frequency is synchronized to an external clock from 200kHz to 1MHz for noise-sensitive applications. The LTM4700 also has self- and load-protection features against fault conditions such as over- and undervoltage, overcurrent and overtemperature.

The µModule regulators are complete component-in-package power management solutions with integrated DC-DC controllers, power transistors,


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