2.25 MHz switching — inductor and capacitor selection
The TPS62272DRVT is a Texas Instruments step-down buck converter switching at 2.25 MHz. That frequency lets you use a small inductor, typically 2.2 µH to 4.7 µH, and a ceramic output capacitor in the 10 µF range — the sort of passives that fit a compact 6-WSON (2x2) footprint. The 400 mA output current covers low-power rails for MCU cores, sensor supplies, or wireless module power in battery-powered or point-of-load designs.
Input range and output flexibility
Input voltage spans 2 V to 6 V, so it runs from a single Li-ion cell, two alkaline cells, or a 3.3 V/5 V regulated rail. The output is programmable via external resistors, with fixed-voltage options of 2.1 V and 3.3 V available in the family.
Thermal and layout in the 6-WSON package
At 400 mA full load, the junction-to-ambient thermal resistance depends on the board's copper area under the pad — a 1-inch-square top-layer pour is typical for keeping the die below 85°C in still air.
No official second-source or direct pin-compatible replacement is listed in the family, so the BOM line is tied to this single order code.