The LM20125MHX/NOPB is a 5A adjustable step-down buck regulator from TI's PowerWise® series, switching at 500 kHz. The integrated synchronous rectifier eliminates the external Schottky diode, cutting the BOM count and improving efficiency at the full 5 A load — the thermal dissipation stays in the package rather than a separate diode. The -40°C to 125°C junction temperature range qualifies it for industrial enclosures and automotive cabin environments, though no AEC-Q grade is listed on this order code.
Package and board-fit — 16-HTSSOP thermal pad
Housed in a 16-PowerTSSOP with an exposed thermal pad, the 16-HTSSOP footprint requires a thermal land on the PCB to pull heat from the die. The supplier device package is 16-HTSSOP — the same mechanical outline as the PowerTSSOP, but the 'H' suffix indicates the exposed pad version. Confirm the PCB footprint matches the TI recommended land pattern before committing the layout.
The NOPB suffix confirms lead-free / ROHS3 status across the TI portfolio.