This is my new, upgraded, I2C controllable buck-boost converter based on the TPS55289. You can control it's output voltage with any arduino, any esp32, stm32 etc...any MCU.

INPUT VOLTAGE: 3V-30V

OUTPUT VOLTAGE (INTFB = 3): 0.8V-21.29V in 10mV steps

OUTPUT VOLTAGE (INTFB = 2): 0.6V-15.96V in 7.5mV steps

OUTPUT VOLTAGE (INTFB = 1): 0.4V-10.64V in 5mV steps

OUTPUT VOLTAGE (INTFB = 0): 0.2V-5.32V in 2.5mV steps

Dimensions(WxLxH): 34.3x54.1x14.5mm (13.5x21.3x5.71 in)

Additions/changes made:

• Some components are now on the bottom of the PCB, so that it's easier for people to change values if they want
• Components on the back have clear labels and values
• Rotated GND label
• Deleted reference designators to save space
• Rotated I2C address switch
• Slightly smaller size compared to V3.0

Order instruction: 4 layer, 4mil track spacing, 0.25mm+ min hole size