Microchip Technology PIC16F15376 Curiosity Nano Hardware User's Manual page 11

Figure 3-3. Target Regulator Safe Operation Area
3.3.2 External Supply
PIC16F15376 Curiosity Nano can be powered by an external voltage instead of the on-board target regulator. When
the Voltage Off (VOFF) pin is shorted to ground (GND) the on-board debugger firmware disables the target regulator,
and it is safe to apply an external voltage to the VTG pin.
WARNING
WARNING
Programming, debugging, and data streaming is still possible with an external power supply: The debugger and
signal level shifters will be powered from the USB cable. Both regulators, the debugger, and the level shifters are
powered down when the USB cable is removed.
3.3.3 VBUS Output Pin
PIC16F15376 Curiosity Nano has a VBUS output pin which can be used to power external components that need a
5V supply. The VBUS output pin has a PTC fuse to protect the USB against short circuits. A side effect of the PTC
fuse is a voltage drop on the VBUS output with higher current loads. The chart below shows the voltage versus the
current load of the VBUS output.
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Applying an external voltage to the VTG pin without shorting VOFF to GND may cause permanent damage
to the kit.
Absolute maximum external voltage is 5.5V for the on-board level shifters, and the standard operating
condition of the PIC16F15376 is 2.3-5.5V. Applying a higher voltage may cause permanent damage to the
kit.
PIC16F15376 Curiosity Nano
User Guide
Curiosity Nano
50002900B-page 11