To achieve longest battery life should I drive each LMR2410 with 12V (one is regulating to 5V, one to 3.3, one to 1.8, and one to 1.2v). OR should I drive 5v into the 3.3 and 1.8 ans 1.2V regulators. Estimated current draw for each voltage is 200mA? the webbench tool shows >95% efficiency wheather input is 12v or 5V for the 3.3 and 1.8 supplies. Instead of looking at efficiency, maybe I should use WEBENCH reported power disipation for each IC in the different configuration to point to the solution?
Is there another suggstion?
thanks