LTC2937 Programmable Six-Channel Sequencer and Voltage Supervisor with EEPROM

Analog Devices' LTC2937 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 during sequencing and monitoring, the LTC2937 accurately monitors supply turn-on / -off delays and output voltage levels. In the event of a fault, response actions include complete power supply shutdown and optional restarts. The root cause of power faults are logged to EEPROM. For systems with high supply count, a simple single wire connection between multiple LTC2937 devices allows sequencing expansion to 300 supplies. After successful sequencing and supply voltage stabilization, the reset output pulls high to initiate microprocessor or other system activity. To accommodate supply margin testing, the reset output can be disabled. Upon supply turn-off, integrated current sources are available as needed to discharge slowly decaying supplies. Configuration EEPROM supports autonomous operation without software.

Digital Power System Management

Programmable Six Supply Sequencer and Supervisor

This part is Code Supported: There is example code available for this part. The code can be downloaded or copied and pasted into your project. Linduino is Analog Devices' Arduino compatible system for developing and distributing firmware libraries and example code for Analog Devices' integrated circuits.		LTpowerPlay is a powerful development environment supporting Analog Devices' Digital Power System Management (PSM) products, providing unprecedented diagnostic and debug features.
Features
Time- and event-based sequencing 12 programmable under-voltage (UV) and overvoltage (OV) comparators: ±0.75% accuracy I2C / SMBus interface Stalled power supply detection Single wire synchronization allows controller expansion to 50 devices (300 power supplies) Configuration and fault logging in EEPROM		EEPROM specified over entire temperature range, rated to 85°C, 10 k writes, 20-year retention Supported by LTpowerPlay™ GUI Fault and system status registers Reset output with programmable delay Wide input supply voltage range: 2.9 V to 16.5 V 28-lead QFN (5 mm × 6 mm) package
Applications
Network servers Data storage systems		Telecom equipment High availability computer systems