- November 01, 2016
November 1, 2016 – Intersil Corporation announced 12 digital multiphase controllers and a companion smart power stage, including a digital solution with an Adaptive Voltage Scaling Bus (AVSBus). The digital controllers provide up to seven phases assignable in any combination across two outputs, and combine with smart power stages to provide a scalable solution from 10A to 450A.
AVSBus joins the PMBus v1.3 specification and features a 50MHz high-speed bus that connects directly to the processor to communicate telemetry data and deliver efficiency savings through adaptive voltage positioning. Intersil’s new DC/DC controllers and ISL99227 60A smart power stage support demanding CPU core voltages, memory, and auxiliary power rails, enabling power designers to customize their solution to meet any rail requirements.
The digital multiphase family is comprised of three groups of controllers. The ISL68137 and ISL68134 controllers utilize the AVSBus to power and communicate with ARM-based processors in network routers, switches, servers, storage, and wireless telecom equipment. Two general-purpose controllers (ISL68127 and ISL68124) power network processors, FPGAs, SoCs and graphics accelerators. And eight controllers (ISL69147/44, ISL69137/34, ISL69128/27 and ISL69125/24) add a secondary high-speed interface (SVID or SVI2) to power the latest Intel and AMD processors in cloud computing applications that make up the Internet of Things (IoT) backbone.
The ISL681xx and ISL691xx controllers integrate a high performance digital engine featuring a patented synthetic current control architecture that tracks each phase current with zero latency. This allows the device to respond to any load transient with precise current and voltage positioning, and 30% less capacitance than competitive devices. Synthetic current control also makes it possible to develop high reliability systems using all ceramic capacitors.
Engineers are able to realize the flexibility and benefit of digital control through Intersil’s easy to use PowerNavigator GUI software tool. PowerNavigator connects to development boards communicating across PMBus and AVSBus, allowing engineers to set up and control all parameters, optimize efficiency via precise current thresholds for adding/dropping phases, and adjust the loop tuning. PowerNavigator eliminates board rework as designs are completed with on the fly changes for stability tuning and optimization. The final configuration is simply stored to non-volatile memory.