Hi Eric, I have built it before I made changes. The reason? I find that the battery is used up in just 2 or 3 days. That's because if the 1.2V(from battery) is taken away from shdn pin and is left disconnected, it is still active and floating somewhere in the range. So either shdn pin is connected to above 1v or 0V, it will be in active or shutdown mode respecively. That is, I want to enable or disenable LTC3525-3.3 by any switches, to conserve battery's power. You may refer to
datasheet. And I am surprised that 10uH inductor is connected to shdn pin in your drawing. How is it possible? see page 7 of this datasheet.
Roff, I am aware. But I connected 1.2V to SO via diode and it still works. If not, how do we isolate S0 from other switches, if we want to enable and disenable LTC3525-3.3?
Please advise. Thanks in advance