6 A buck in a 3x2 mm footprint
The TPS62816QWRWYRQ1 is a 6 A continuous, synchronous step-down buck regulator from Texas Instruments, part of the Automotive AEC-Q100 series. The 1.8 MHz to 4 MHz switching frequency lets you keep the inductor small — a 0.47 µH to 2.2 µH part usually fits — while the 9-VQFN-HR (3x2) package with wettable flanks eases AOI inspection on automotive boards.
Thermal and switching trade-offs
At 6 A and 3.3 V out from 5 V in, expect efficiency in the mid-90 % range — the exact number depends on the inductor DCR and switching frequency selected. Compared to the LMR33630APCQRNXRQ1 (3 A, 2.1 MHz fixed), the TPS62816QWRWYRQ1 doubles the output current and offers a wider adjustable frequency range, but the LMR33630 runs at a lower fixed frequency that may suit noise-sensitive loads.