I am working on a WSN project montoring CH4 gas. I used a LiFePO4 battery, voltage from 2.0 to 3.6v,i need a regulator to convert the voltage to a fixed 3.0v.and this 3.0v power supply will power a cc2530+cc2591 ,a INA :AD8236,a dual omp:AD4505-2,and a gas sensor. The total output current are less than 1A. So i want a low cost, low-power, high-efficent regulator.It does not matter wether the output connect the input or not. Does ADI have this kind regulator ,suit for my portable device?