Switching voltage through a linear voltage regulator is a problem of power consumption, which is more suitable for switching circuits that need to avoid noise (such as car stereos) and therefore cannot be switched. The switch mode is characterized by the conversion efficiency is very high, but it also has the problem of noise, so choose what type of conversion depends on the application.
In general, the efficiency of the charge pump-driven mode varies with the input voltage. In the application of large voltage variation range, its efficiency is low, but in the application of voltage variation range is smaller, it can achieve maximum efficiency only when the input and output voltage is the integral multiple, but it is difficult to be achieved in the practical application of battery power supply. The conversion efficiency of the inverse inductance is less affected by the voltage interference and the application limit is smaller than the charge pump.