Boost Converter

250Hz switching frequency is very very low and you need huge magnetics. The current value of inductance (33uH) results in 60A peaks of current through it and the switch, which is bad and can cause sever damage to several devices. 33uH is a value used typically in the 100khz region. Here, for an acceptable amount of current, you need 600uH inductor (3.3A peaks), which would be very large in size and is very large in value. Using a high switching frequency and small magnetics is always the best way to go. DC-DC converters use switching frequencies starting from a few tens of kilohertz to a few megahertz. For breadboard/perfboard projects using through-hole components, 20khz-100khz is a good frequency range. Otherwise, DC-DC converters are better off switching faster than that and in surface mount packages.

@PrathikP, nice info.

Thank you very much @BillyT