The TPS62270DRVR is a 400 mA step-down buck converter from TI that switches at 2.25 MHz. That frequency lets you use a small-value inductor — typically in the 2.2 µH to 4.7 µH range — which keeps the overall footprint tight. The 2.25 MHz switching also pushes the fundamental ripple above the AM band, which simplifies filtering in noise-sensitive designs. The output is programmable via external feedback resistors, with a fixed-voltage option at 0.9 V or 1.15 V for the fixed-output variants in the family.
400 mA output — load budget and thermal reality
Rated for 400 mA continuous output, the TPS62270DRVR fits point-of-load rails for MCU cores, sensor supplies, or wireless module power. The 2.25 MHz switching keeps the inductor small, but the 400 mA ceiling means you need to stay below about 320 mA at 85°C ambient if you want margin — the WSON package's thermal impedance (RθJA around 60°C/W with the exposed pad soldered) will dictate the real-world derating.
6-WSON with exposed pad — footprint and thermal handling
The 0.65 mm pitch is fine for a standard 2-layer board if you route the output and input caps close.