Power system manager relieves computation & polling
Providing current, power and energy monitoring of the intermediate bus input to Point-of-Load (PoL) converters, a four-channel PMBus digital power system manager has been released by Linear Technology. By providing the energy consumed, reported in joules, and the elapsed time through a PMBus interface, the LTC2975 relieves computation and polling.
Long-term monitoring of a power system’s conversion efficiency is enabled when the input data is combined with digital measurements of PoL output voltages, currents and power. Speeding time-to-market, improving system reliability and optimising board energy consumption, the device adds software-based monitoring and control to the power system on FPGA, ASIC and DSP boards.
Improving board yields and long-term performance, supply output voltages are trimmed, margined and monitored using a 16-bit ADC with 0.25% total unadjusted error. The LTC2975 integrates supply sequencing, supervision and EEPROM fault-logging. EEPROM black box recording is triggered by faults, simplifying failure analysis while providing insight into future system improvements. To sequence and fault-manage more than four rails, multiple LTC2975 power system managers can connect together. For flexible programming and data read back of the power system, a number of PMBus compatible commands are provided.
The LTpowerPlay development environment, which supports all Linear Technology digital power system management devices, enables register configuration. No software coding is needed for autonomous operation after the device is programmed.
Operating from a 0 to +70°C commercial range and a -40 to +105°C industrial temperature range, the LTC2975 is offered in a 64-pin 9x9mm QFN package. The power system manager is available now, priced at $9.75 each in 1,000 unit quantities.
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