3 A buck in a 1.6 mm × 1.6 mm SOT-583
The TPS628503DRLR is a 3 A continuous-output synchronous buck regulator from Texas Instruments, in the SOT-583 package. Input range spans 2.7 V to 6 V, output adjustable from 0.6 V up to 5.5 V. Switching frequency is programmable between 1.8 MHz and 4 MHz.
150°C junction — thermal headroom without derating
Rated for junction temperatures from -40°C to 150°C, the TPS628503DRLR keeps the full 3 A output available in enclosures with limited airflow or high ambient heat.