Quad digital-power-supply manager has powerful GUI

摘要

The LTC2974 power-supply manager from Linear Technology provides digital management of power-supply systems with four or more power rails. It uses an I2C interface and PMBus command set to monitor and control positive or negative supplies. The LTC2974's four channels simultaneously monitor voltage, current, and external temperature so that users can compensate for shifting MOSFET on-resistance or direct-current resistance. Users can margin and trim each supply over temperature, using a digital servo loop that measures the rail voltage and continuously adjusts it to maintain accuracy. The supply functions provide better-than-±0.25% total unadjusted error.