Switching voltage through a linear regulator is a power problem that is more suitable for switching circuits that need to avoid noise (such as car stereos) and thus cannot be switched.
The switching mode is characterized by very high conversion efficiency, but it also has the problem of noise, so choose which mode of conversion depends on what kind of application. In general, the efficiency of the charge pump drive is changed as the input voltage changes, in the application of large voltage range, its efficiency is low, but in applications where the voltage variation range is smaller, the efficiency of the input and output voltages can be maximized only when it is the integral multiple relation. But this is difficult to achieve in the actual application of battery power. The conversion efficiency of the reverse inductance is less than the voltage interference, and the application limit is smaller than the charge pump.