BUY MC33063AP1 https://www.utsource.net/itm/p/11223735.html

Description: The MC33063A is a high performance fixed frequency current mode controller. Features: Operating frequency up to 500kHz Low start-up current (typically 0.5mA) Low operating current (typically 6mA) Under-voltage lockout Thermal shutdown Operates in either step-up (Boost), step-down (Buck) or inverting modes High current totem pole output (capable of driving 2 N-channel MOSFETs) Internal soft-start Internal leading edge blanking Internal compensation Available in 8-pin PDIP, SOIC, and TSSOP packages Applications: Switch mode power supplies DC/DC converters Battery chargers Off-line converters DC/AC inverters Motor control High current switching applications (For reference only)