1 A buck in a 2 mm² footprint
The TPS628501DRLR is a 1 A synchronous buck regulator from Texas Instruments in a SOT-583 package — roughly 2 mm × 2 mm. That footprint is the main event: it lets you put a 1 A rail within a few millimeters of the load without a separate inductor or cap array eating board space. Output is adjustable from 0.6 V up to 5.5 V, covering core and I/O rails for most MCUs and FPGAs.
Switching frequency and thermal headroom
Switching frequency spans 1.8 MHz to 4 MHz, set by a single resistor. At 4 MHz the inductor drops to 0.47 µH — that shrinks the total solution footprint, but the switching losses climb. At 1.8 MHz efficiency peaks, but the inductor is larger. The 150°C junction rating means you can run at the higher frequency near a 105°C ambient without hitting the thermal wall. Compare with the LMR33630APCQRNXRQ1, a 3 A automotive buck in a wettable-flank package. The TPS628501DRLR delivers one-third the current but in a fraction of the board area — the SOT-583 is roughly 4 mm² versus the LMR33630's 9 mm². If your load is under 1 A and board space is the constraint, the TPS628501DRLR wins without a re-spin.
For a kitting lead planning a 3–5 year production run, that means no forced redesign mid-cycle.