Thank you for replying!Have you looked at the datasheet? 2.5V is the reference voltage. As Dodgydave pointed out, you can make the cathode voltage higher with a voltage divider. See Fig. 20.
Dave incorrectly called the feedback pin "gate". It is actually the "ref" pin.
See the attached specs.
by Aaron Carman
by Jake Hertz
by Duane Benson
by Aaron Carman