6 MHz switching, 650 mA — the small-rail workhorse
The Texas Instruments TPS62672YFDR is a fixed-output step-down buck converter that switches at 6 MHz, delivering up to 650 mA from a 2.3 V to 4.8 V input rail. That 6 MHz switching frequency is the headline feature — it lets you use a 1 µH inductor and small ceramic caps, shrinking the power stage to fit a tight PCB budget. Output is fixed at 1.5 V, so no feedback divider network is needed; just the inductor, input cap, and output cap and the rail is set.
DSBGA package — no field swap without hot air
The 6-bump DSBGA (6-XFBGA) package is tiny — about 1.2 mm × 0.9 mm — which is great for space but means this is not a part you swap on site with a soldering iron. The bumps are under the die, so orientation is not obvious by sight; the package marking or the board silkscreen is your only guide.