In order to future proof the RC car I opted for an buck/boost converter in the event that the battery topology might change. At the moment we are using 4xAAA battery's with a nominal voltage of 6V, If we later want to use a 1C or 2C lipo the circuit can handle it. Furthermore, by using a converter we can assure that the power supply for all the actuators will be keeps constant independent of the charge level of the battery.
TI TPS63070
evm board: https://cdn.sparkfun.com/assets/e/4/a/1/4/TPS63070_DataSheet.pdf
Pros and cons:
Simple to use, cheap, just tie the EN to Vcc and off you go. Only issue that we cant source the IC….
Analog Devices LTC3112IFE
Pros and cons:
To get the best performance we need to use the PWM/SYNC pin , not cheap, we have a current output pin so we can measure the current which is cool.
https://www.analog.com/media/en/technical-documentation/user-guides/dc1598a.pdf
https://www.analog.com/media/en/technical-documentation/user-guides/dc1598a.pdf