The LTC1871EMS#TRPBF Switching Controllers No Rsense DC/DC Controller Boost, Flyback & SEPIC from Analog Devices is a high-efficiency, low-power buck-boost switching controller with integrated MOSFET drivers and load current sense. It is designed to operate in all topologies of Boost, Flyback, and SEPIC, and can be used for non-Isolated and Isolated DC/DC converter applications up to 10A when using integrated power switches. It has a wide 4.5V to 26V input voltage range and is capable of efficiently and reliably delivering power at up to 95% efficiency. It also includes features like current foldback overcurrent protection, an active valley-fill mode for lower EMI/EMC, and programmable frequency for selecting the optimal operating frequency.