The LNK364PN integrated circuit, a member of the LinkSwitch-TN family produced by Power Integrations, stands out for its utility in low-power, off-line switch mode power supplies.
The TPS54231 is a 2A non-synchronous buck converter from Texas Instruments. The TPS54321DR has an integrated low RDS (on) high-side MOSFET, designed to enhance efficiency in various electronic applications.