The Nordic Thingy:53™ can power external devices with up to 300 mA through a 3.3 V regulator (U6) that is connected to the nPM1100 Power Management Integrated Circuit (PMIC)'s VSYS output. The VSYS output is exposed also on the current measurement and debug connector (P6).
When the 3.3 V regulator is not in use, it can be turned off by pulling the 3V3_ENABLE pin (P0.15) low.
Note: In the Nordic Thingy:53 board files in Zephyr™,
3V3_ENABLE is set low by default.
The following schematic describes the regulator.
Figure 1. Regulator
