You could do a sync rec buck converter.The implication of asking for 1.22 Volts is that the tolerance is plus or minus 5 milli-volts, which is pretty tight. On a switching regulator, 80 Amps out @ 1.22 v is about 97.6 Watts. assuming 80% efficiency you need 122 Watts in. for a 12V supply that is just over 10 Amps. This might be doable, but not for the faint of heart.
by Jake Hertz
by Duane Benson
by Jake Hertz
by Dale Wilson