AIO Power Supply: LT8391 buck-boost power supply with adjustable constant current and constant-voltage limit

Hardware design of a 50 x 50 mm buck-boost power supply with the LT8391 four-switch controller: adjustable constant current up to 3.33 A (set by a PWM or DC logic signal on CTRL) with a fixed constant-voltage limit of about 48 V; the change between constant current and constant voltage is automatic. Input about 4 V to 60 V, output voltage below, equal to or above the input. PWM switching of the output via a series P-MOSFET, reverse polarity protection, TVS and ESD protection. Contents: schematics (V1, V2) and board layout of V2 as PDF, bill of materials, design calculations (current, CTRL filter, CV limit, UVLO) and a bench measurement of the input current versus output voltage. License: CC BY 4.0. Hobby project, not a certified product.