If you take a look at the specs sheet here:
https://www.pololu.com/product/2866/specs
You'll see that it's also a fixed output voltage of 5v
if you see the description of the regulator says...
The output voltage,
VOUT, is set to 5V by default. The output voltage can optionally be lowered by adding a resistor between the
FB pin and VOUT as detailed in the
Decreasing the output voltage section below.
Decreasing the output voltage
The set voltage can optionally be decreased by adding an external resistor between the FB and the neighboring VOUT pin. The equations below show how the output voltage relates to the value of an external resistor,
R:
For example, to get an output voltage of 3.3 V, you could put a 23.7 kΩ resistor between FB and VOUT.
The minimum VOUT for this regulator is 0.8 V. Please note that the small VOUT pin next to FB is not intended to source much current; its purpose is to provide a convenient spot for connecting a voltage-adjustment resistor.
