Hi
I need to design a circuit and following are the inputs/requirements:
1) Power source is 2 AA cells in series. Voltage would be about 3.6V with new cells and drop down to 2V over time
2) Need 3V and about 100mA for the MCU+sensors circuit
3) Need 5 to 6V for the actuators with about 500mA
I am thinking of the following approach.

Following are few questions I have:
1) Is this a good/suggested approach?
2) If not, could you please point out the issues in this and suggest a better solution?
