This paper proposes a multi-phase constant on-time I <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> control architecture with adaptive voltage positioning (AVP) for voltage regulators (VRs). By including both fast inner current loop and the slow outer current loop, fast load transient performance and accurate current control can be achieved. In addition, in order to overcome the current ripple cancellation effects over wide duty ratios for future microprocess…