The core advantage of the buck boost DC-DC controller is that it can provide stable output regardless of whether the input voltage is higher, lower, or equal to the output voltage. Modern solutions often adopt a four switch single inductor topology, which supports seamless switching between buck, boost, and buck boost modes, with an efficiency of over 95%. It also integrates protection functions such as overcurrent and overheating, making it an ideal choice to solve the contradiction between wide voltage input and stable output.