Fixed 1.5 V at 500 mA — the BOM-fit check
The TPS62301DRCRG4 is a fixed-output step-down (buck) converter from Texas Instruments, delivering 500 mA at a regulated 1.5 V from an input rail between 2.7 V and 6 V.
At 3 MHz the switching period is about 330 ns, so the inductor ripple current stays manageable with values in the 1 µH to 2.2 µH range. That keeps the inductor physically small — typically a 2.5 mm × 2.0 mm shielded type — and the output capacitor in the 10 µF to 22 µF ceramic class.
Package and thermal: 10-VSON with exposed pad
The datasheet recommends a 2.6 mm × 2.6 mm copper land on the PCB with at least four thermal vias to the ground plane. Without that pad soldered to a copper pour, the junction-to-ambient thermal resistance rises and the 500 mA output at high ambient temperature may push the die past the 85°C operating limit.