Simple Switcher Step-Down Regulator lm267x series makes all the calculations for the integrated program. Tube information as well as application circuit is given in Lm2678 properties • Efficiency up to 92% • Simple and easy to design with (using... Electronics Projects, LM267X Step-Down Regulator LM267X Desing Tool "dc dc converter circuit, electronics software tools, " Date 2019/08/01