500 mA in a 1.45×1 mm SON — where it fits
The TPS622311DRYR is a fixed-output step-down (buck) converter from Texas Instruments, delivering 500 mA continuous output from a 2.05 V to 6 V input.
Fixed 1.1 V rail — core supply for modern logic
The fixed 1.1 V output targets the core voltage of low-power MCUs, FPGAs, and SoCs that run on sub-1.2 V rails. The 2.05 V minimum input covers a single-cell Li-Ion battery through its discharge curve, and the 6 V maximum handles 5 V USB or regulated 5 V rails without a pre-regulator.
6-UFDFN package — layout and thermal notes
The 6-UFDFN package measures 1.45 mm × 1.0 mm — roughly the size of a 0402 resistor. Standard MSL-1 moisture sensitivity applies — no bake required before reflow if the shelf-life seal is intact.
For new designs, this means standard lead times through distribution — no urgency to stockpile or qualify a second source. The base product number TPS622311 covers multiple fixed-output voltage variants in the same package, so if a future board spin needs a different output voltage, the PCB footprint stays the same.