Fixed 2.9 V output, 500 mA buck for tight rails
The TPS622317DRYT is a synchronous step-down (buck) regulator from Texas Instruments, delivering a fixed 2.9 V output at up to 500 mA from a 2.05 V to 6 V input rail. Synchronous rectification means no external Schottky diode; the internal low-side FET handles the freewheeling.
Input range, temperature grade, and package realities
Rework note: 6-UFDFN under the hot-air station
The 1.45x1 mm body is small enough that the part can shift during reflow if the solder paste volume is uneven. Use a stencil aperture that matches the pad geometry exactly — the datasheet landing pattern is your reference.