11.2 Pin Voltage
All digital & analog pins on the Nano ESP32 are 3.3 V. Do not connect any higher voltage devices to any of the pins
as it will risk damaging the board.
11.3 VIN Rating
The recommended input voltage range is 6-21 V.
You should not attempt to power the board with a voltage outside the recommended range, particularly not higher
than 21 V.
The efficiency of the converter depends on the input voltage via the VIN pin. See the average below for a board
operation with normal current consumption:
4.5 V - >90%.
12 V - 85-90%
18 V - <85%
This information is extracted from the MP2322GQH's datasheet.
11.4 VUSB
There is no 5V pin available on the Nano ESP32. 5 V can only be provided via the VUSB, which is supplied directly
from the USB-C® power source.
While powering the board via the VIN pin, the VUSB pin is not activated. This means you have no option of
providing 5 V from the board unless powered via USB or externally.
11.5 Using the 3.3 V Pin
The 3.3 V pin is connected to the 3.3 V rail which is connected to the output of the MP2322GQH step down
converter. This pin is primarily used to power external components.
11.6 Pin Current
The GPIOs on the Nano ESP32 can handle source currents up to 40 mA, and sink currents up to 28 mA. Never
connect devices that draw higher current directly to a GPIO.
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