Linear Technology Corporation (Milpitas, CA) introduces the LTC2974 power supply manager with EEPROM for digital management of power supply systems with four or more power rails. The LTC2974 utilizes an I²C interface and PMBus command set to monitor and control positive or negative supplies, providing rapid troubleshooting and debug capabilities during power system design, development, production, and failure analysis.
Any supply with a "run" pin can be sequenced and controlled using tracking or time-based events. The LTC2974's four channels simultaneously monitor voltage and current, as well as external temperature so users can compensate for shifting MOSFET RDS(ON) or inductor DCR. Each supply can be margined and trimmed over temperature, using a digital servo loop that measures the rail voltage and continuously adjusts to maintain accuracy.
The LTC2974 is suitable for a wide variety of applications, including uninterruptible power supplies (UPS), automotive, medical, video and networking applications. The LTC2974 integrates differential measurement and adjustment, high resolution data converters, high retention EEPROM, and a precise reference to enable digital management of an otherwise purely analog power system.