PMP7773 is a SEPIC replacement buck boost step up/ step down converter with one inductor, two FETs and two diodes. The design also incorporates a boost converter and takes the 5V out and boosts it to 15V. It also has a switch capacitor converter. LM2662 takes the step up/ step down output and steps it to 10V which is used as a bias supply for boost converter LM5020.
PMP7872 is a synchronous buck converter capable of 50W output power. This design uses the LM25117QPSQ emulated current-mode synchronous buck controller and AUIRLR2905Z MOSFETs for automotive applications.