2 A automotive buck with 125 °C ceiling
The TPS6281208QWRWYRQ1 is a Texas Instruments automotive-grade synchronous step-down converter delivering 2 A continuous from a 2.75 V to 6 V input rail. The fixed 1.1 V output targets core and I/O supplies in automotive ECU, ADAS sensor modules, and infotainment power trees where the ambient under the dashboard or behind the head unit can push past 85 °C.
Switching frequency range and output set point
The switching frequency spans 1.8 MHz to 4 MHz, letting the designer trade off inductor size against efficiency — 1.8 MHz keeps switching losses lower for a 12 V battery-derived rail, while 4 MHz shrinks the magnetics for space-constrained camera or radar modules. Output is fixed at 1.1 V, so no external feedback divider is needed; the internal compensation is tuned for that set point.
AEC-Q100 and the 125 °C operating window
Package and footprint for production
The 9-VFQFN-HR (3x2 mm) package with wettable flanks supports automated optical inspection (AOI) of the solder joints — a requirement for automotive production lines that cannot rely on x-ray sampling alone. The small footprint leaves room for the input and output caps close to the IC, which is critical for keeping the switching loop tight at 4 MHz.