iFlight BLITZ Mini ATF435 stack is a budget-friendly combination of a flight controller and ESC. The stack features a 20x20mm mounting pattern, making it suitable for smaller 3-4" drones as well as standard 5" drones powered by a 3-6S Lipo battery.
Flight controller uses an AT32F435RGT7 processor, a BMI270 gyro, and a DPS310 barometer for altitude measurement. It has 6 UART ports for connecting additional peripherals and 16MB of Blackbox memory. The board also includes a 5V BEC. ESCs support a current of up to 55A. They use 8-bit BB21 processors and thus support the BlHeli_S or Bluejay firmware.