Renesas: scalable digital controllers for cloud computing, communications, and industrial

Renesas Electronics announced two new PMBus compliant, fully digital DC/DC controllers that provide single output point-of-load conversions for FPGAs, DSPs, ASICs, network processors and general purpose system rails. The ISL68300 with integrated MOSFET drivers and ISL68301 with PWM output simplify designing power supplies for data center, wired and wireless communications, and factory automation equipment. The ISL68300 can drive discrete external MOSFETs directly, while the ISL68301 pairs with Renesas’ smart power stages or DrMOS power stages to create a complete voltage regulator solution.

The ISL68300 and ISL68301 digital controllers feature a high-speed current share bus that parallels up to eight controllers in an 8-phase 240A+ current share configuration. Both controllers implement Renesas’ digital ChargeMode control modulation, which responds to load transients in a single switching cycle, and provides an inherently stable control loop without requiring external compensation. This modulation architecture significantly reduces output capacitor requirements and minimizes Vout undershoot and overshoot.

Engineers can use the PowerNavigator GUI with the ISL68300 and ISL68301 to simplify power supply setup, sequencing, configuration and monitoring, including all device parameters and telemetry. Full schematic designs are completed in minutes, and the GUI with PMBus makes it easy to control the entire design and change features without soldering components or rework. To download the PowerNavigator GUI, please visit: www.intersil.com/powernavigator.

In a typical FPGA power supply, the ISL68300 and ISL68301 digital controllers provide single output 10A to 40A+ for auxiliary rails, DDR memory, and system rails. The companion Renesas digital multiphase controllers use smart power stages to provide dual output 15A to 70A, or higher core power.


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