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. The 3 MHz switching frequency lets the designer use a small inductor and output capacitor, shrinking the total solution footprint for space-constrained boards.
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. The synchronous rectifier eliminates the external Schottky catch diode, saving one component and one placement step.
Package and thermal: 10-VSON with exposed pad
The 10-VSON (3 mm × 3 mm) package has an exposed thermal pad on the bottom. 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.