A novel concept of digitally controlled multiple output POL for power supply on chip

A power supply on chip (SoC) has been attracted attentions of many researchers because it can realize ultimate minimization of the power supply. It is quite promising for ICT applications because its features, such as smaller volume, high frequency response, and so on, fit for requirement of POL used in ICT equipment. In this paper, we propose the novel concept of digitally controlled multiple output POLs suitable for power SoC. We also report the simulation and experimental results of the proposed strategy. The results show that the proposed strategy enables to supply various output voltages using boost and back modes at the same time and improves the efficiency over the wide range. In addition, the voltage regulation through voltage detection is preferable compared with that through current detection because the voltage based technique can supply multiple voltages by only rewriting the digital code of FPGA or DSP.