
PWM-programmed LM317 fixed present supply
LM317 followers will acknowledge Determine 1 as the standard LM317 fixed present supply topology. It carefully regulates Iout = Vadj/Rs by forcing the OUTPUT pin to be Vadj = 1.25 V constructive relative to the ADJ pin. Thus, Iout = Vadj/Rs to an excellent approximation. Grasp chip chef Bob Pease cooked it as much as…