How to Use a Boost Converter to Drive a SEPIC
Applications may require a DC/DC converter to provide a regulated output voltage between the minimum and maximum input voltage. A single buck or boost cannot supply the required output. However, a boost converter integrated circuit (IC) can be configured to drive a single-ended, primary-inductor converter (SEPIC) power stage and provide a regulated output voltage between the input voltage extremes. This application report goes through a detailed design procedure based on the TPS55340 data sheet including component selection and layout considerations. Lastly, considerations for improvements and advantages of a SEPIC design are covered.