Power supply sequencer/voltage supervisor for detecting power supply output faults

Analog Devices LTC2937 Power Supply Sequencer and Voltage Supervisor is a six-channel power supply sequencer and voltage supervisor. Supplies are enabled or disabled with precise user-controlled order and time spacing. To detect power supply output faults throughout sequencing and monitoring, the device accurately monitors supply turn-on/off delays and output voltage levels. In the event of a fault, response actions incorporate total power supply shutdown and optional restarts. The root cause of power faults is logged on the EEPROM.

For systems with high supply count, a simple single-wire connection between multiple devices enables sequencing expansion to 300 supplies. After successful sequencing and supply voltage stabilisation, the reset output pulls high to initiate microprocessor or other system activity. To support supply margin testing, the reset output can be disabled. Upon supply turn-off, integrated current sources are offered as required to discharge slowly decaying supplies. Configuration EEPROM supports autonomous operation without software.

Typical applications include network servers, data storage systems, telecom equipment, and high availability computer systems.