I need serious help choosing an IC for my project. I need a step-up boost converter to power my device from a 1000mAh or 2000mAh lithium ion battery. So far I have measured that my device only draws around 25mA when I wired in an ammeter. From looking at the data sheets and using "quiescent" current ratings, I calculated that the device would draw 62.8mA of current. Since I am using an ATmega32, I looked up what the absolute worst maximum current draw would be and found that an absolute max of 400mA could be drawn from the atmega32, but I will likely never really see that.
Based on that, I've been looking for an IC that will boost 3.7V DC to 9V DC with a max output current of around 500mA. Can someone advise me on why I am having a difficult time in finding such an IC and can anyone make any suggestions for a circuit that I can incorporate?