Pin compatible hybrid digital and analogue point of load modules simplify designs

March 18, 2019 //By Nick Flaherty
Pin compatible hybrid digital and analogue point of load modules simplify designs
Renesas Electronics has launched two encapsulated hybrid digital DC-DC PMBus power modules with a power density of 115mA/sq mm and up to 95 percent peak efficiency alongside two pin compatible analogue versions.

The 10A ISL8280M and 15A ISL8282M hybrid digital modules measure 12mm x 11mm and provide complete single-channel, synchronous step-down regulated power supplies that operate over an input voltage range of 4.5V to 16.5V. Alongside the PMBus versions, Renesas has also launched analogue power variants (the ISL8210M and ISL8212M) in the same pin-to-pin compatible 12mm x 11mm package with the same 10A and 15A of output current.

The modules provide point-of-load (POL) conversion for advanced FPGAs, DSPs, ASICs and memory used in servers, storage, optical networking, telecom, and a broad range of space-constrained industrial applications. Each device integrates a PWM controller, MOSFETs, and inductor inside a new thermally optimized, Grid High Density Array (GHDA) encapsulated module. To complete the power supply, designers simply add input and output ceramic capacitors.

The ISL828xM hybrid digital and ISL821xM analogue power modules feature integrated LDOs that enable single-supply operation and use the Renesas R4 high-speed control loop architecture with inherent line voltage feed-forward to give designers both ultra-fast load transient response and high noise immunity. The proprietary Grid HDA package offers high levels of electrical and thermal performance through a single-layer conductive package substrate that efficiently transfers heat from the module to the system board, and dissipates it without requiring airflow or heatsinks – even under heavy load conditions.

“Our newest power modules expand Renesas’ growing portfolio, adding new capabilities to our performance analogue module family and bridging the gap between them and our full digital power modules,” said Philip Chesley, Vice President, Industrial Analog and Power Business Division, Renesas Electronics Corporation. “The new hybrid digital power modules offer class-leading power density and efficiency not achievable with discrete components. Compared to competitors’ module designs, the new Grid HDA package makes it easier for customers to mount the module on their circuit board.”

The 0.5V to 5V output voltage has a ± 1.5% output voltage accuracy over line, load, and temperature with remote sensing. There are 256 output voltage options configurable through a simple pin-strap resistor setting and


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