4 A point-of-load regulator — parametric envelope
The TPS6286820CRQYR: The 2.4 MHz switching frequency keeps the inductor and output capacitor physically small — a 1 µH inductor and 22 µF ceramic output cap are typical for a 3.3 V to 1.8 V conversion at 4 A. Output voltage is adjustable from 0.8 V to 3.35 V via an external resistor divider, covering core voltages for modern digital logic (0.9 V, 1.2 V, 1.8 V) as well as I/O and auxiliary rails. The integrated synchronous rectifier eliminates the external Schottky diode and improves efficiency at low output voltages — expect >90 % efficiency at 3.3 V in to 1.8 V out at 2 A.