use batteries. It works by regulating the output voltage (VO = 3.4V) with a specific voltage conversion ratio (M = VO/VIN), given a supplied voltage (VIN = 2.7 ~ 4.2V) that fluctuates based on the battery’s state-of-charge. In traditional non-inverting buck-boost topology, the inductor current (IL) is typically greater than the output current (IO), leading to a significant conduction loss attributed to the inductor’s series resistance (DCR) and the switches’ on-resistance (RON). Thus, many hybrid attempts involving flying capacitors (CF) have been made to reduce IL. The approaches in [1–3] are able to decrease IL to be equal to IO, but only in the boost mode (M > 1), due to their design that directly connects the inductor to the output. When compared to a conventional buck converter, these
Operation, Always-Reduced Inductor Current, and the Use, of All CMOS Switches
Dae-Hyeon Kim, Hyun-Sik Kim Korea Advanced Institute of Science and Technology, Daejeon, Korea The buck-boost converter is essential for managing power on mobile devices that