2 A buck in SOT-583 — what it buys you
That 2 A rating in the 1.6 mm × 1.6 mm SOT-583 package means you can power a sensor node or a small processor rail without reserving board space for a larger inductor or output cap — the 1.8 MHz to 4 MHz switching frequency lets you shrink the LC filter to a 0603 or 0805 footprint.
Input range and output flexibility
The 2.7 V minimum input covers single-cell Li-ion down to 3.0 V with margin, and the 6 V maximum keeps it off 12 V buses — this is a low-voltage rail part, not a multi-purpose wide-VIN regulator. The adjustable output from 0.6 V to 5.5 V lets it feed 1.2 V core rails, 1.8 V I/O, or 3.3 V peripheral supplies from the same BOM line. Compared to the LMR33630APCQRNXRQ1 (3 A, 3.8 V–36 V input, 125 °C TJ), the TPS628502DRLR trades input range and output current for a smaller package and higher junction temperature. The LM53625LQURNLRQ1 (2.5 A fixed output, 150 °C TJ) is a closer thermal peer but has a fixed output voltage, so the adjustable TPS628502DRLR gives more design flexibility if your output voltage is non-standard.
For volume RFQs, the base product number TPS628502 covers multiple output current and package variants; the DRLR suffix specifically identifies the SOT-583 package on 7-inch reel.