I need a converter to accept in an input of up to 50vdc with a potentiometer to adjust the output to 13 – 14vdc.  Under normal load, the input will be below 20vdc.  But with minimal load or if the load is accidentally removed, the input can go as high as high as 50vdc.  I need about 3-4 amps.

P/N 090406 may work, but on the limit with current

P/N 3005adj, which I like the package, has too low  input rating

P/N 200220 is too large to fit where it has to be mounted.

Any suggestions?