The integrated MOSFET is robust against voltage spikes.

Which would you prefer?

This IC is widely used in power conversion for both consumer and industrial electronics:

The STR F6267 datasheet PDF provides detailed specifications for the IC, including:

Can be synchronized with an external clock for more precise operation in complex systems. Datasheet and Availability

: Typically found in a 5-pin SIP (Single In-line Package) or TO-3P.