I have data on smaller modules with ESP32 and ESP8266, but can't find anything reliable pertaining to the whole board power consumption (current) with 12V input and microcontroller at low power or sleep state. The power subsystem on Arduino compatible boards like this one:
consists of step-down switching regulator to 5V and linear regulator to 3.3V. I wonder how this design behaves when the ESP microcontroller itself draws very small current, e.g. below 1mA. Does anyone have current measurement at DC input socket when microcontroller is in low power state without any peripherals attached to the board?