25 A synchronous buck in a 6×5 mm power-pad package
The Texas Instruments TPS56221DQPR is a single-output synchronous buck regulator rated for 25 A continuous output from a 4.5 V to 14 V input rail. Output is adjustable from 0.6 V up to 13.02 V.
What the 25 A rating means for your power stage
The 25 A figure is the rated continuous output current. That sets the inductor saturation current floor, the output capacitor ripple rating, and the PCB copper pour needed to keep the junction under 125 °C.
Switching frequency selection — layout call
Three pin-selectable frequencies give you a trade-off without changing the BOM layout: 300 kHz for highest efficiency and wider inductor options, 500 kHz as a middle ground, and 950 kHz to minimise inductor footprint at the cost of slightly higher switching losses. The 950 kHz setting pushes the fundamental switching noise above the AM broadcast band, which helps in noise-sensitive designs. Whatever you pick, keep the switching node loop tight — the high di/dt at 25 A will radiate if the input cap isn't right at the IC pins.
Temperature grade and environment
Rated for junction temperatures from -40 °C to 125 °C.
Lifecycle and sourcing reality
ROHS3 compliant. No second-source alternate is listed in the official cross-reference, so dual-sourcing would require a separate qualification effort.