LTC2975

4-Channel PMBus Power System Manager Featuring Accurate Input Current and Energy Measurement

Buy Now

Recommended for New Designs

Top

Overview

Features and Benefits
Product Details

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

Power Monitor, Control, and Protection
- Digital Power System Managers

Markets and Technologies

Data Center

Comparable Parts Click to see all in Parametric Search

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)

DC2428A

LTC2975 Demo Board Set | LTM4644-1 Quad 4A Power Supply Management (includes DC2382A + DC2363A) [requires DC1613]

DC2022A

LTC2975 Demo Board: 4 Power Supply Manager with Input Energy Monitoring [Requires DC1613]

DC1508B-B

LTC2974, LTC2975 Socketed Programming Board (Requires DC1613)

DC2518A

LTC2975 Demo Board: ±12V, ±48V Power Supply Management [requires DC1613]

DC2578A

Total Power Management: Hot Swap, Intermediate Bus Voltage, Point-of-Load (Featuring LTC4281, LTC3886, LTC3887, LTC2975) [Requires DC1613]

DC2428A

View Detailed Evaluation Kit Information

The DC2428A is a two-board demonstration system for the LTC2975 Power System Manager and LTM4644-1 quad 4A μModule regulator. The DC2382A contains all the circuitry needed to use the LTC2975 in a power system and control four power supplies. The DC2363A contains four power supplies (LTM4644-1) that the LTC2975 configures and controls. The DC2363A and DC2382A demo boards together provide a sophisticated 4-channel digitally programmable power supply system.

Resources

DC2022A

View Detailed Evaluation Kit Information

The DC2022A is a demonstration system that showcases the LTC2975, a 4-channel I²C/SMBus/PMBus power system manager with EEPROM. The LTC2975 monitors and controls four power supply rails. The LTC2975 also monitors input current and input voltage, which are used to calculate input power and accumulate energy. The DC2022A demonstrates the ability of the LTC2975 to sequence, trim, margin, supervise, monitor, and log faults for four power supplies. Each power supply channel’s output voltage is monitored and the LTC2975 monitors its own internal die temperature.

Resources

DC1508B-B

View Detailed Evaluation Kit Information

The DC1508B programming board contains the circuitry needed to program and verify the EEPROM of the LTC2974, LTC2975, LTC2977, LTC2978, and LTC2978A. This is its sole purpose. The DC1508B is shipped with a clamshell style programming socket installed. The EEPROM contains the factory default configuration. The LTpowerPlay^™ *.proj file that corresponds to the factory default can be found in the GUI.

Resources

DC2518A

View Detailed Evaluation Kit Information

The DC2518A is a demonstration system for the LTC2975 Power System Manager that interfaces to various regulators. The board contains all the circuitry needed to use the LTC2975 in a power system and control four power supplies. The four power supplies include linear and switching regulators for the purpose of demonstrating a variety of methods to sense voltage and current. The demo board provides a sophisticated, digitally programmable 4-channel power supply system.

Resources

DC2578A

View Detailed Evaluation Kit Information

The DC2578A is a complete power chain, including a hot swap controller, an intermediate bus controller, and six point-of-load channels with power system management. The board demonstrates how to safely transfer power from a backplane, through an LTC4281 hot swap controller, through an LTC3886 step-down intermediate bus controller (IBC), and out through the point-of-load converters (POLs) that regulate load voltages. It shows the comprehensive set of power management, cooperation, and safety features of the Analog Devices solution, and showcases how easy it is to configure and manage the whole power hierarchy. Each regulated supply has the ability to sequence, trim, margin, supervise, measure, respond cooperatively to faults, and log fault information in nonvolatile memory. In addition, the onboard load pulser helps with optimizing the adjustable LTC3886 control loop response. The rich set of status and telemetry information provided by the entire system is consolidated and presented under one GUI interface — LTpowerPlay.

Resources

Documentation & Resources

Data Sheets

LTC2975: 4-Channel PMBus Power System Manager Featuring Accurate Input Current and Energy Measurement Data Sheet (Rev. D)
10/15/2014

PDF

1 M

Reliability Data

R544 Reliability Data
3/26/2018

PDF

151 K

Application Notes

AN-166: In Flight Update with Linduino
4/10/2017

PDF

1M
AN-155: Fault Log Decoding with Linduino PSM
1/26/2017

PDF

224K
AN-153: Linduino for Power System Management
12/5/2016

PDF

1M
AN-152: Power System Management Addressing (Rev. A)
7/12/2016

PDF

164K
AN-145: Overview of the EEPROM in LTC PSM Devices
7/20/2015

PDF

2M
AN-137: Accurate Temperature Sensing with an External P-N Junction
9/20/2012

PDF

527K

User Guides

DC2578A - Demo Board Manual
1/18/2018

PDF

2M
DC2518A - Demo Manual
5/3/2017

PDF

4M
DC2428A - Demo Manual
2/2/2017

PDF

5M
DC2022A - Demo Manual
10/16/2014

PDF

1M
DC1508B - Demo Manual
6/24/2014

PDF

792K

Product Information

Design Checklist for LTC297X Family of PSM Managers
8/22/2016

PDF

215K

Product Selector Card

Power System Manager and Super Sequencer Selection Guide
2/23/2018

PDF

4M
Digital Power System Management
4/4/2017

PDF

1M

Videos

Four-Channel PMBus Power System Manager with Input Energy Monitoring for Comprehensive Power System Management
10/15/2018

Design Notes

FPGA Power System Management
3/1/2020

Press Releases

PMBus Digital Power System Manager Monitors Board Energy Consumption
9/16/2021

Technical Articles

Current Sensing with PMBus Digital Power System Managers—Part 2
1/1/2022 Analog Dialogue
Current Sensing with PMBus Digital Power System Managers—Part 1
12/1/2021 Analog Dialogue
High Accuracy Energy Monitoring Solutions from Linear Technology
9/6/2016
I²C Programmable Multichannel Voltage Supervisors with EEPROM
4/1/2015 LT Journal
Linduino PSM
3/12/2015

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.

Purchase Linduino

Linduino download and documentation

Code Files

LTC2975 - Linduino Header File

LTC2975 - Linduino CPP File

LTC2975 - DC2382.ino

LTC2975 - DC2022A.ino

Design Tools

LTpowerPlay^®

LTpowerPlay® is a powerful, Windows-based development environment supporting Linear Technology's Digital Power System Management (PSM) products.

Product Recommendations

LTC2975 Companion Parts

Recommended Related Parts

LTC2974, LTC2977.

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.

Quality And Reliability

Symbols and Footprints

PCN-PDN Information

Request Product/Process Change Notifications

Save to myAnalog

Support & Discussions

LTC2975 Discussions

RE: LTC2975 vs. LTC2974

All LTC2975 Discussions

Contact ADI Technical Support »

Ask your question »

Contact ADI Technical Support »

Ask your question »

Sample & Buy

Ordering FAQs

See our Ordering FAQs for answers to questions about online orders, payment options and more.

Buy Now Pricing

(**) Displayed Buy Now Price and Price Range is based on small quantity orders.

List Pricing

(*)The 1Ku 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. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

Sampling

Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.

Price Table Help

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.