High side power MOSFET switch driver for a low-power AC/DC converter

With the emergence of always-on wireless sensing nodes, AC/DC power conversion solutions for sub 1 W applications are required. Existing approaches are not efficient for such output loads, and therefore, new solutions need to be provided. In this paper, we propose a solution that is optimized for operation with output loads up to 500 mW, while high efficiency and close to zero no-load consumption have been our foremost design goals. The proposed design is implemented in a high-voltage CMOS process and transistor level simulation results show improved properties of the proposed solution over the existing ones.