The LTC2978 is equipped with all of the necessary functions to address today’s most demanding multi-rail digital power management systems. An 8-channel sequencer allows synchronization of sequencing delays when turning on or off supplies in any order. Sequencing is time-synchronized to within ±10µs. If there is a need to support more channels, and dependencies must be established, multiple LTC2978’s can be strung together with just one connection and a fault-sharing bus can be used; up to 72 supplies per I²C segment of a bus can be managed. High-speed comparators with programmable deglitch circuitry supervise the voltage level of each rail and take immediate action if a rail goes out of its specified limits. User-defined overvoltage and undervoltage thresholds for each supply rail are saved in the  EEPROM, while an on-chip digital temperature sensor monitors temperature and provides alerts if over- or under-temperature user defined thresholds are exceeded. An SMBus compliant hardware alert pin pulls low to notify of a fault, while the voltage supervisor, voltage monitor and temperature faults are logged to EEPROM. Margining and trimming each rail is extremely accurate over temperature, even at low voltages, using a digital servo loop that measures the rail voltage and continuously curtails any inaccuracies. The LTC2978 also boasts an accuracy of less than ±0.25% total unadjusted error (TUE) and a resolution of 122µV and 15.6µV, respectively, when monitoring voltage and current. The LTC2978 can be powered from an unregulated 4.5V to 15V power supply while providing a regulated 3.3V output, or the internal regulator can be bypassed for powering directly from a 3.3V input supply.