The TPS3851 features a watchdog timer with an independent watchdog output (WDO). The independent watchdog output provides the flexibility to flag a fault in the watchdog timing without performing an entire system reset. When RESET is not asserted (high), the WDO signal maintains normal operation. When asserted, WDO remains low for t_RST. When the RESET signal is asserted (low), the WDO pin goes to a high-impedance state. When RESET is unasserted, the watchdog timer resumes normal operation.