600 mA synchronous buck in a 2×2 mm WSON
The internal synchronous rectifier eliminates the external catch diode, keeping the BOM count low for space-constrained designs like portable instruments, wireless sensors, and single-cell Li-Ion powered modules.
2.25 MHz switching — inductor size vs efficiency trade
The 2.25 MHz switching frequency lets you use a small inductor (typically 2.2 µH to 4.7 µH) and small output capacitors, shrinking the total power-stage footprint. The trade-off is higher switching losses at light loads — the fixed-frequency PWM runs continuously, so at sub-mA output the quiescent current dominates the efficiency curve.