What the 2.5 V threshold and 619 ms timeout mean for your rail
The TPS3840PL25DBVRQ1 monitors a single 2.5 V supply rail and asserts a reset output when the voltage drops below the threshold. The 619 ms typical reset timeout holds the system in reset long enough for the supply to recover from a brownout or for the main regulator to sequence up — common in automotive ECU power-on sequencing where the MCU needs a clean start after the CAN transceiver and sensor supplies settle. The push-pull output drives the reset line directly without an external pull-up resistor, saving one component per rail. Active low reset matches the majority of automotive MCU reset inputs.
AEC-Q100 qualification and 125 °C junction rating
The SOT-23-5 package keeps the footprint small enough for space-constrained ECU boards.
The base product number TPS3840 shares the same die and package options across the threshold-voltage family, so a BOM change to a different voltage variant is a straightforward drop-in swap.
The part is sourced per RFQ — confirm the BOM quantity and target lead time at quote. No stock-holding claim; availability confirmed at order placement.