A Fully Integrated Galvanically Isolated DC-DC Converter With Data Communication

This paper presents a fully integrated galvanically isolated dc-dc converter with data communication. The converter, which is fabricated in a 0.35-μm BCD technology, is made up of only two silicon dice and adopts two 6-kV on-chip transformers. It takes advantage of a customized architecture, which uses the isolated power control link to transfer bidirectional half-duplex data, thus reducing the overall silicon area and package size. The proposed dc-dc converter delivers up to 93-mW output power with 19% maximum power efficiency and an output voltage ranging from 2.4 V to 3.3 V, while achieving a data rate up to 50 Mb/s.