3 A fixed 5 V output in a 3×3 mm VQFN
The TPS62133AQRGTTQ1 is a 3 A continuous-rated synchronous buck regulator with a fixed 5 V output, from a 3 V to 17 V input range. The 2.5 MHz switching frequency keeps the output inductor and capacitor small — the whole converter fits in roughly the footprint of the 16-VQFN (3×3 mm) package plus a few 0805 passives. The DCS-Control™ architecture gives fast transient response without an external compensation network. AEC-Q100 Grade 1 qualification means the junction temperature range spans –40°C to 125°C, so this part is at home under the hood or on an engine-mounted ECU board.
Input range and switching frequency for the BOM
With a minimum input of 3 V and a maximum of 17 V, the TPS62133AQRGTTQ1 covers 5 V and 12 V automotive rails cleanly. The 2.5 MHz switching frequency lets you select a 1 µH to 2.2 µH inductor and 10 µF to 22 µF output capacitor — the BOM fits in a dense layout without pushing the switching loss too high. The fixed 5 V output eliminates the feedback resistor divider, so the output accuracy depends only on the internal reference.
ROHS3 compliant.