Three-rail supervisor for ATX and industrial supplies
The Texas Instruments TPS3511DRG4 is a multi-voltage supervisor that monitors three supply rails simultaneously — 3.3 V, 5 V, and 12 V — with a single active-low, open-drain reset output. It is designed for systems that need a clean power-up sequence across multiple voltage domains, such as ATX power supplies, server motherboards, and industrial control boards where a missed rail can cause logic latch-up.
Reset timing and output drive
Because the output is open-drain, it can be wire-ORed with other reset sources (watchdog, manual reset button) using a single pull-up resistor to the logic supply. The active-low polarity matches the reset input of most MCUs and DSPs.