boost converter

A Boost Driver is a switched mode power supply that acts as a DC-to-DC transformer, reducing available current but increasing voltage.

pros and cons

nothing is without tradeoffs

[p] high efficiency
[p] stable voltage output
[p] controllable by altering the frequency at which the switch (probably a MOSFET) is switched.
[c] cost & complexity
[c] voltage ripple
[c] EMI and inrush current from the switching action.

realization using an LM555 timer IC

referencing the LM555 timer IC datasheet configured as indicated above

\begin{aligned} Duty Cycle = \frac{R_{B}}{R_{A} + 2 R_{B}} \\ T & = t_{1} + t_{2} \\ t_{1} = \ln (2) (R_{A} + R_{B}) C & t_{2} = \ln (2) (R_{B}) C \\ where t_{1} is output high & and t_{2} is output low \\ f & = \frac{1}{T} = \frac{1.44}{(R_{A} + 2 R_{B}) C} \end{aligned}

N.B. - $\ln (2) \approx 0.693$ , $\frac{1}{\ln (2)} \approx 1.44$