BUY UC2842BN https://www.utsource.net/itm/p/11246421.html

Description: High Performance Current Mode PWM Controller Features: Internal Slope Compensation Internal Soft Start Pulse-by-Pulse Current Limiting Low Start-up and Operating Current Low Power Loss Under Voltage Lockout Thermal Shutdown Output Clamp for Inductive Transient Suppression Output for Driving an External N-Channel MOSFET Available in 8-Pin DIP and SOIC Packages Application: Switching Power Supplies Motor Controls Battery Chargers SMPS and DC-DC Converters (For reference only)