Simple voltage build-up circuit
That is a boost converter, but you don't need neither S1 nor S3. And yes, it will work, but you need a controller IC to generate the proper PWM signal for S2, so that Vout is kept constant and at your desired level (the IC will measure that voltage, and will work in closed loop).

Your output voltage, assuming continuous mode, will be

$$
V_{out}=\frac{1}{1-D_2} V_{in},
$$

where D2 is the duty ratio of S2.

You can buy something like this, and add the external parts.