BUY CA3273 https://www.utsource.net/itm/p/528750.html
High-Side-Driver Current Switch
Description: The CA3273 is a monolithic integrated circuit designed for use as a high voltage, high speed switch. Features: - High voltage rating: up to 500V - High speed switching: up to 1MHz - Low on-resistance: 0.2Ω - Low input capacitance: 0.5pF - Low input current: 0.1mA Applications: - High voltage switching - High speed switching - Motor control - Power supply control - Automotive applications (For reference only)