Model Predictive Control of an Integrated Buck Converter for Digital SoC Domains in 65nm CMOS

This paper describes a digital control architecture for integrated voltage regulators (IVRs) that achieves time-optimal transient supply-voltage (V _dd ) response under random load-current (I _load ) fluctuation. Implementing low-complexity low-latency Model Predictive Control (MPC) is key to achieving a measured 2.49X settling-time (τ _settle ) improvement over optimally tuned Proportional Integral Differential (PID) control.