ADI's LTC2972, LTC2974, LTC2975, LTC2977, and LTC2979 are power system managers used to sequence, trim (servo), margin, supervise, manage faults, provide telemetry, and create fault logs. The LTC2972 has two channels, and the LTC2974/LTC2975 have four channels. LTC2977 has eight channels, and the LTC2979 has 16 channels. PMBus commands support power supply sequencing, precision point-of-load voltage adjustment, and margining. DACs use a proprietary soft-connect algorithm to minimize supply disturbances. Supervisory functions include overvoltage, undervoltage, and temperature threshold limits for two power supply output channels, as well as overvoltage and undervoltage threshold limits for a single power supply input channel. Programmable fault responses can disable the power supplies with optional retry after a fault is detected. Faults that disable a power supply can automatically trigger black box EEPROM storage of fault status and associated telemetry.

An internal 16-bit ADC monitors output voltages, output currents, external temperatures, input voltage and current, and die temperature. Input power, energy, and output power are also calculated. A programmable watchdog timer monitors microprocessor activity for a stalled condition and resets the microprocessor if necessary. A single wire bus synchronizes power supplies across multiple ADI power system management (PSM) devices. Configuration EEPROM with ECC supports autonomous operation without additional software. The LTC2972, LTC2974, LTC2975, LTC2977, and LTC2979 are ideal for computer, industrial and high-reliability applications.