This powerful, adjustable boost regulator can generate an output voltage as high as 9.5 V from an input voltage as low as 1.5 V, all in a tiny, 10 mm x 22 mm x 5.8 mm package. A trimmer potentiometer lets you set the boost regulator’s output voltage to a value between 2.5 and 9.5 V
More info:http://www.pololu.com/catalog/product/791