BUY LM2587T-ADJ https://www.utsource.net/itm/p/9934173.html
IC REG MULT CONFG ADJ 5A TO220-5
Description: The LM2587T-ADJ is a monolithic integrated circuit specifically designed for flyback, step-up (boost), and forward converter applications. Features: -Wide 4.5V to 40V input voltage range -Output voltage adjustable from 1.23V to 37V -Maximum output current of 3A -Internal frequency compensation -Internal soft-start -Thermal shutdown -Current limit protection Applications: -Battery-powered systems -DC-DC converters -Power supplies -LED drivers -Portable electronics (For reference only)