Battery Management Stand-alone or IC controlled 70-V bidirectional buck-boost charge controller with MPPT 36-VQFN -40 to 85 1 595-BQ25756RRVR https://www.mouser.co.uk/ProductDetail/Texas-Instruments/BQ25756RRVR?qs=HoCaDK9Nz5ckDWwb4xOATA%3D%3D Texas Instruments BQ25756RRVR

Ultralow Power Energy Harvester PMUs with MPPT and Charge Management, LFCSP-24 energy harvester LFCSP 1EP 4x4mm P0.5mm