Using Pololu Adjustable Boost Regulator with 2C battery?


I’ve just bought one Pololu Adjustable Boost Regulator 2.5-9.5V and I’m thinking about the battery to use with it.

I want to power some of your Micro Metal Gearmotors at 6v so the obvious battery should be a 1C 3.7v LiPo in order to obtain the desired output from it, but I would like to know if I could use instead a 2C 7.4v battery as input to obtain the 6v output.

Would it be possible? Could I damage the regulator with that input voltage?

If it is possible, how many mA could it output with that input?

Sorry for my bad English.

Thanks a lot.


Your English looks great. The boost regulator can only make the voltage go higher, so it wouldn’t do anything useful for you from 7.4V to 6V. You could have the boost voltage be around 8V and get fairly consistent power (the voltage could be a bit higher at full charge). You can approximate your available output current using an 80% efficiency and 2A max input current. For instance, if you want to go from 4V to 6V, 100% efficiency would mean your output current would be 2/3 of 2A, or 1.3A. Multiply in the 80% efficiency, and you get about 1A max.

- Jan