You need to define "suitable". The circuit in your post is a voltage regulator which can be adjusted to output a fixed voltage for a charging a variety of batteries, but has no provision for controlling charge current or detecting when the battery is fully charged. If your phone can do the charge control (most can) then setting the regulator to output 5V should work. However, some phones need to negotiate with the charging source for anything above a minimum charge current.glad if you can draw me a suitable circuit.
by Jeff Child
by Jake Hertz