Figure 3-3. Target Regulator Safe Operation Area
3.3.2
External Supply
PIC18F47Q10 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
Applying an external voltage to the VTG pin without shorting
VOFF
to
GND
may cause
permanent damage to the kit.
WARNING
Absolute maximum external voltage is 5.5V for the level shifters on board. Applying a higher
voltage may cause permanent damage to the kit.
Programming, debugging, and data streaming is still possible while using external power: 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
PIC18F47Q10 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 show the voltage versus the current load of the VBUS output.
PIC18F47Q10 Curiosity Nano
Curiosity Nano
©
2019 Microchip Technology Inc.
User Guide
DS40002103A-page 10
