LTM2987 - 16-Channel μModule PMBus Power System Manager

The LTM®2987 is a 16-channel μModule® (micromodule) Power System Manager used to sequence, trim (servo), margin, supervise, manage faults, provide telemetry and create fault logs. PMBus commands support power supply sequencing, precision point-of-load voltage adjustment and margining. DACs use a proprietary soft-connect algorithm to minimize supply disturbances. Supervisory functions include overvoltage and undervoltage threshold limits for sixteen power supply output channels and two power supply input channels, as well as over and under temperature limits. Programmable fault responses can disable the power supplies with optional retry after a fault is detected. Faults that disable a power supply can automatically trigger black box EEPROM storage of fault status and associated telemetry. An internal 16-bit ADC monitors sixteen output voltages, two input voltages, and die temperature. In addition, odd numbered channels can be configured to measure the voltage across a current sense resistor. A programmable watchdog timer monitors microprocessor activity for a stalled condition and resets the microprocessor if necessary. A single wire bus synchronizes power supplies across multiple LTC Power System Management (PSM) devices. Configuration EEPROM supports autonomous operation without additional software.

Features

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Sequence, Trim, Margin and Supervise 16 Power Supplies
Manage Faults, Monitor Telemetry and Create Fault Logs
PMBus™ Compliant Command Set
Supported by LTpowerPlay™ GUI
Margin or Trim Supplies to 0.25% Accuracy
Fast OV/UV Supervisors Per Channel
Coordinate Sequencing and Fault Management Across Multiple LTC PSM Devices
Automatic Fault Logging to Internal EEPROM
Operate Autonomously without Additional Software
Internal Temperature and Input Voltage Supervisors
Accurate Monitoring of 16 Output Voltages, Two Input Voltages and Internal Die Temperature
I2C/SMBus Serial Interface
Can Be Powered from 3.3V, or 4.5V to 15V
Programmable Watchdog Timer
Available in 144-Lead 15mm × 15mm BGA Package
LTpowerPlay Configuration and Development Tool