Automotive-rated 1 A buck in a 2x2 mm footprint
It delivers a fixed 3.3 V output at up to 1 A from an input range of 3 V to 17 V, switching at 2.25 MHz.
Input range and output — what the 3 V to 17 V window covers
The 17 V maximum handles nominal 12 V plus the typical load-dump clamp levels seen in 12 V systems. The fixed 3.3 V output is a common rail for powering the MCU, CAN transceiver, or sensor bias — no external resistor divider needed, which saves two components and one feedback-node noise path.
Package and thermal — the 2x2 mm WSON exposed pad
At 1 A output, the power dissipation depends on the input-to-output differential and the switching losses. Without that, the junction temperature rises quickly above 85°C ambient.