LTC2975
4-Channel PMBus Power System Manager Featuring Accurate Input Current and Energy Measurement
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Overview
Features and Benefits
- Sequence, Trim, Margin and Supervise Four 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
- Monitor Input Current (±1%) and Accumulate Energy
- Fast OV/UV and OC Supervisors Per Channel
- Coordinate Sequencing and Fault Management Across Multiple LTC PSM Devices
- Automatic Fault Logging to Internal EEPROM
- Operate Autonomously Without Additional Software
- External Temperature and Input Voltage Supervisors
- Accurate Monitoring of Four Output Voltages, Four Output Currents, Four External Temperatures, Input Voltage and Current, and Internal Die Temperature
- Can Be Powered from 3.3V, or 4.5V to 15V
- Pin-Compatible to the LTC2974
- Available in 64-Lead 9mm × 9mm QFN Package and in 63-Lead 6.25mm × 7.5mm BGA Package
- AEC-Q100 Qualified for Automotive Applications
Product Details
The LTC2975 is a 4-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 over and under current, voltage and temperature threshold limits for four power supply output channels as well as over and under voltage threshold limits for a single power supply input channel. 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 four output voltages, four output currents, four external temperatures, input voltage and current, and die temperature. Input power, energy, and output power is also calculated. 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 ADI Power System Management (PSM) devices. Configuration EEPROM with ECC supports autonomous operation without additional software.
APPLICATIONS
- Computers and Network Servers
- Industrial Test and Measurement
- High Reliability Systems
- Video and Medical Imaging
Product Categories
Markets and Technologies
Product Lifecycle
Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (5)
Documentation & Resources
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R544 Reliability Data3/26/2018PDF151 K
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AN-166: In Flight Update with Linduino4/10/2017PDF1M
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AN-155: Fault Log Decoding with Linduino PSM1/26/2017PDF224K
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AN-153: Linduino for Power System Management12/5/2016PDF1M
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AN-152: Power System Management Addressing (Rev. A)7/12/2016PDF164K
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AN-145: Overview of the EEPROM in LTC PSM Devices7/20/2015PDF2M
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AN-137: Accurate Temperature Sensing with an External P-N Junction9/20/2012PDF527K
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DC2578A - Demo Board Manual1/18/2018PDF2M
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DC2518A - Demo Manual5/3/2017PDF4M
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DC2428A - Demo Manual2/2/2017PDF5M
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DC2022A - Demo Manual10/16/2014PDF1M
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DC1508B - Demo Manual6/24/2014PDF792K
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Design Checklist for LTC297X Family of PSM Managers8/22/2016PDF215K
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Power System Manager and Super Sequencer Selection Guide2/23/2018PDF4M
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Digital Power System Management4/4/2017PDF1M
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FPGA Power System Management3/1/2020
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Current Sensing with PMBus Digital Power System Managers—Part 21/1/2022 Analog Dialogue
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Current Sensing with PMBus Digital Power System Managers—Part 112/1/2021 Analog Dialogue
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High Accuracy Energy Monitoring Solutions from Linear Technology9/6/2016
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I2C Programmable Multichannel Voltage Supervisors with EEPROM4/1/2015 LT Journal
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Linduino PSM3/12/2015
Tools & Simulations
Linduino
Linduino is Analog Devices’ Arduino compatible system for developing and distributing firmware libraries and example code for our integrated circuits. Each Linduino-supported product includes an example main program, defined in the LTSketchbook/Part Number folder and driver code, defined in the LTSketchbook/libraries folder.
Linduino code repository on GitHub and instructions on how to use the code.
Design Tools
LTpowerPlay®
LTpowerPlay® is a powerful, Windows-based development environment supporting Linear Technology's Digital Power System Management (PSM) products.
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
PCN-PDN Information
Support & Discussions
LTC2975 Discussions
RE: LTC2975 vs. LTC2974
18 week(s) ago in Power Management
Sample & Buy
See our Ordering FAQs for answers to questions about online orders, payment options and more.
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
Sampling:
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Evaluation Boards
Pricing displayed is based on 1-piece.
Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.