Automotive reset supervisor for 2.5 V rails
It monitors a single 2.5 V supply rail and asserts an active-low, open-drain reset output when the voltage drops below the threshold, holding the reset for a minimum of 170 ms after the rail recovers.
170 ms reset timeout — what it buys the system
The 170 ms minimum reset timeout gives the power supply time to stabilise after a brown-out or power-up event before the processor or ASIC is released from reset. This is long enough to cover the charging time of typical bulk decoupling capacitors on a 2.5 V rail without requiring an external delay capacitor.
Package and footprint for production
The TPS3851G25EQDRBRQ1 comes in an 8-VSON package with a 3x3 mm body and an exposed thermal pad (8-VDFN Exposed Pad). The wettable flank option improves solder-joint inspection and reliability, which is especially useful for automotive assembly lines using automated optical inspection (AOI). The small footprint suits space-constrained ECU layouts.