Current leak using a voltage divider with the XIAO ESP32-C6

[msfujino]

The sleep current of XIAO_ESP32C6 is 14.3uA. The current consumed by the voltage divider resistor is 18.5uA, which is as small as the sleep current.
However, if we change the way we think about it, connecting a voltage divider resistor doubles the total sleep current to 32.7uA.
If this is a problem, then increase the value of the resistor, or use a voltage divider only when necessary.

Comparison of Sleep Currents for XIAO ESP32C6, S3, and C3

Now that I have three different XIAO ESP32s (C3, S3, and C6), compared their sleep currents. I hope this will be helpful when considering low-power applications. First, I analyzed the schematic and datasheet as a reference. A 3.3V analog regulator XC6210 is used in C3, and this regulator’s quiescent current of 35uA accounts for most of the C3 sleep current. However, a diode NSR0520 is used, which has low reverse current, giving it an advantage in this area compared to S3 and C6. The power sup…