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LTC2977 Datasheet

LTC2977 Datasheet

8-Channel PMBus Power System Manager Featuring Accurate Output Voltage Measurement
Part No.: LTC2977
Page: 92 Pages
Size: 1560 KB
Manufacturer: Linear Technology
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Views: 1
Update Time: 2023-11-08 11:20:05
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LTC2977 Datasheet Applicable Part

Part No. Packing SPQ Marking MSL Pins Temp Range Package Description Buy
LTC2977CUP#PBF Tube 40 LTC2977UP 1 64 0°C ~ 70°C 64-Pin (9mm × 9mm) Plastic QFN  
LTC2977CUP#TRPBF Reel 2000 LTC2977UP 1 64 0°C ~ 70°C 64-Pin (9mm × 9mm) Plastic QFN  
LTC2977CUP#TRMPBF Reel 500 LTC2977UP 1 64 0°C ~ 70°C 64-Pin (9mm × 9mm) Plastic QFN  
LTC2977IUP#PBF Tube 40 LTC2977UP 1 64 -40°C ~ 105°C 64-Pin (9mm × 9mm) Plastic QFN  
LTC2977IUP#TRPBF Reel 2000 LTC2977UP 1 64 -40°C ~ 105°C 64-Pin (9mm × 9mm) Plastic QFN  
LTC2977IUP#TRMPBF Reel 500 LTC2977UP 1 64 -40°C ~ 105°C 64-Pin (9mm × 9mm) Plastic QFN  
LTC2977IUP#WPBF Tube 40 LTC2977UP 1 64 -40°C ~ 105°C 64-Pin (9mm × 9mm) Plastic QFN  
LTC2977IUP#WTRPBF Reel 2000 LTC2977UP 1 64 -40°C ~ 105°C 64-Pin (9mm × 9mm) Plastic QFN  
LTC2977IUP#WTRMPBF Reel 500 LTC2977UP 1 64 -40°C ~ 105°C 64-Pin (9mm × 9mm) Plastic QFN  
SPQ:Standard Pack Quantity;MSL:Moisture Sensitivity Level

LTC2977 Datasheet(PDF)

LTC2977 Datasheet(Picture)

LTC2977 Features

  • Sequence, Trim, Margin and Supervise Eight Power Supplies
  • Manage Faults, Monitor Telemetry and Create Fault Logs
  • PMBus Compliant Command Set
  • Supported by LTpowerPlay® GUI
  • Margin or Trim Supplies to Within 0.25% of Target
  • 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 Eight Output Voltages, Input Voltage and Internal Die Temperature
  • I2C/SMBus Serial Interface
  • Can Be Powered from 3.3V, or 4.5V to 15V
  • Programmable Watchdog Timer
  • 100% Pin-Compatible Upgrade to the LTC2978/LTC2978A
  • Available in 64-Pin 9mm × 9mm QFN Package
  • AEC-Q100 Qualified for Automotive Applications

LTC2977 Applications

  • Computers and Network Servers
  • Industrial Test and Measurement
  • High Reliability Systems
  • Medical Imaging
  • Video

LTC2977 Description

The LTC2977 is an 8-channel 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 eight power supply output channels and one power supply input channel, 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 eight output voltages, one input voltage, 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 with ECC supports autonomous operation without additional software.

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