Renesas Electronics ISL68300 and ISL68301 digital controllers

Renesas Electronics has announced two PMBus-compliant, fully digital DC/DC controllers that provide single output point-of-load (POL) conversions for FPGAs, DSPs, ASICs, network processors and general-purpose system rails.

The ISL68300 with integrated MOSFET drivers and ISL68301 with PWM output are said to simplify designing power supplies for data centre, wired and wireless communications, and factory automation equipment. The ISL68300 can drive discrete external MOSFETs directly, while the ISL68301 pairs with Renesas’s smart power stages or DrMOS power stages to create a complete voltage regulator solution.

The digital controllers feature a high-speed current share bus that parallels up to eight controllers in an eight-phase 240 A+ current share configuration. Both implement the company’s 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 minimises V_out undershoot and overshoot.

Engineers can use the PowerNavigator GUI with the controllers to simplify power supply set-up, 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.