AEC-Q100 unipolar switch for position sensing
The DRV5023FIEDBZRQ1 is a unipolar Hall-effect switch from Texas Instruments, qualified to AEC-Q100 for automotive applications. It responds to a south-pole magnetic field, tripping at 6 mT and releasing at 0.5 mT — the 5.5 mT hysteresis prevents chatter near the threshold. The open-drain output lets you pull up to the MCU's logic level, saving a level shifter.
Temperature range and package
The SOT-23-3 package is a standard three-pin footprint, easy to route on a two-layer board. Output current is rated 30 mA maximum, enough to drive a logic input or a small LED indicator. The switching current (supply draw) is only 2.7 mA typical, keeping the thermal budget low in a sealed module.