LTC2971

2-Channel ±60V Power System Manager

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Recommended for New Designs

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Overview

Features and Benefits
Product Details

Features and Benefits

Sequence, Trim, Margin, Supervise, Manage and Log Faults, and Monitor Telemetry of Two Power Supplies
Monitor Input Voltage from 0V to 60V, Input Current to Within 1%, and Accumulate Energy
Manage Outputs from −60V to 60V and Margin or Trim to within 0.25%
1.8V to 3.3V PMBus/SMBus/I²C Compliant Serial Interface

Supported by LTpowerPlay^® GUI
Coordinate Sequencing and Fault Management Across Multiple ADI PSM Devices
Operate Autonomously Without Additional Software
Connect Directly to Regulator IMON Pins
Can Be Powered from 3.3V, or 4.5V to 60V
Available in a 49-Pin 7mm × 7mm BGA Package

Product Details

The LTC2971, LTC2971-1, LTC2971-2, and LTC2971-3 are 2-channel high voltage Power System Managers used to sequence, trim (servo), margin, supervise, manage faults, provide telemetry and log faults. DACs use a proprietary soft-connect algorithm to minimize supply disturbances. Supervisory functions include over and under voltage and temperature threshold limits for two power supply output channels and one input channel. Programmable fault responses can disable the power supplies, configure retry, and trigger black box EEPROM storage of fault status and associated telemetry. An internal 16-bit ADC monitors two output voltages, two output currents, two external temperatures, input voltage and current, and die temperature. Input power, energy, and output power are also calculated. A programmable watchdog timer monitors microprocessor activity and resets 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.

Product Categories

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

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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 (1)

DC2875A

LTC2971 Demo Board | High Voltage Two 2-Channel PMBus Power System Managers with Four Power Supply Rails

DC2875A

View Detailed Evaluation Kit Information

The DC2875A is a demonstration system for the LTC2971 Power System Manager that interfaces to various regulators. The board contains all the circuitry needed to demonstrate a power system that utilizes two 2-channel LTC2971 devices that manage four power supplies. The four power supplies include various switching regulators for the purpose of demonstrating a variety of methods to sense voltage and current. The demo board provides a sophisticated 4-channel digitally programmable power supply system.

The LTC2971 is a 2-channel I²C/SMBus/PMBus Power System Manager that features accurate input current and energy measurement and is capable of managing ±60V supplies. The device monitors input current and input voltage, and calculates input power and energy. The DC2875A demonstrates the ability of the LTC2971 to sequence, trim, margin, supervise, monitor, and log faults for four power supplies. The LTC2971 monitors each channel’s output voltage and output current and also monitors each channel’s external temperature sensor and its own internal die temperature.

The DC2875A board contains four independent power supply rails. All four rails are based on DC/DC switching regulators. The +36V and +32V channels are managed by an LTC2971 and the ±24V channels are managed by an LTC2971-1. The board is pre-configured with these voltages and may be re-configured with feedback resistors.

The LTpowerPlay^® graphical user interface (GUI) supports this demonstration system and enables complete control of all the features of the LTC2971. Together, the LTpowerPlay software and DC2875A hardware system create a powerful development environment for designing and testing configuration settings of the LTC2971. LTpowerPlay stores these settings in the LTC2971 internal EEPROM or in a project file. The software displays all of the configuration settings and real time measurements from the Power System Management IC. Telemetry allows easy access and decoding of the fault log created by the LTC2971. The board comes preprogrammed with the EEPROM values appropriate for the four power supply rails on the DC2875A. Just plug and play!

Order pre-programmed devices from Analog Devices Express (ADX) using LTpowerPlay.

Features & Benefits

Sequence, Trim, Margin, and Supervise Four Power Supplies
Manage Faults, Monitor Telemetry, Create Fault Logs
PMBus Compliant Command Set
Supported by LTpowerPlay GUI
Margin or Trim Supplies to 0.25% Accuracy
Four I_OUT and Two I_IN Monitors
Input Power Measurement and Energy Accumulation
Fast OV/UV Supervisors per Channel
Multi-Channel Fault Management
Automatic Fault Logging to Internal EEPROM
Operates Autonomously without Additional Software
Monitors: Voltage, Current, Power, Temperature
2-Channel Time-Based Output Sequencer
I²C/SMBus Serial Interface
Powered from 8V to 18V

Resources

Documentation & Resources

Data Sheets

LTC2971: 2-Channel ±60V Power System Manager Data Sheet (Rev. 0)
7/29/2020
PDF

User Guides

DC2875A - Demo Manual (Rev. 0)
7/29/2020
PDF

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

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.View our quality and reliability program and certifications for more information.

Part Number	Material Declaration	Reliability Data	Pin/Package Drawing	CAD Symbols, Footprints & 3D Models
LTC2971CY#PBF	Material Declaration	Reliability Data	49-Lead (7.00mm × 7.00mm × 1.44mm)	Ultra Librarian SamacSys
LTC2971CY-1#PBF	Material Declaration	Reliability Data	49-Lead (7.00mm × 7.00mm × 1.44mm)	Ultra Librarian SamacSys
LTC2971CY-2#PBF	Material Declaration	Reliability Data	49-Lead (7.00mm × 7.00mm × 1.44mm)	Ultra Librarian SamacSys
LTC2971CY-3#PBF	Material Declaration	Reliability Data	49-Lead (7.00mm × 7.00mm × 1.44mm)	Ultra Librarian SamacSys
LTC2971HY#PBF	Material Declaration	Reliability Data	49-Lead (7.00mm × 7.00mm × 1.44mm)	Ultra Librarian SamacSys
LTC2971HY-1#PBF	Material Declaration	Reliability Data	49-Lead (7.00mm × 7.00mm × 1.44mm)	Ultra Librarian SamacSys
LTC2971HY-2#PBF	Material Declaration	Reliability Data	49-Lead (7.00mm × 7.00mm × 1.44mm)	Ultra Librarian SamacSys
LTC2971HY-3#PBF	Material Declaration	Reliability Data	49-Lead (7.00mm × 7.00mm × 1.44mm)	Ultra Librarian SamacSys
LTC2971IY#PBF	Material Declaration	Reliability Data	49-Lead (7.00mm × 7.00mm × 1.44mm)	Ultra Librarian SamacSys
LTC2971IY-1#PBF	Material Declaration	Reliability Data	49-Lead (7.00mm × 7.00mm × 1.44mm)	Ultra Librarian SamacSys
LTC2971IY-2#PBF	Material Declaration	Reliability Data	49-Lead (7.00mm × 7.00mm × 1.44mm)	Ultra Librarian SamacSys
LTC2971IY-3#PBF	Material Declaration	Reliability Data	49-Lead (7.00mm × 7.00mm × 1.44mm)	Ultra Librarian SamacSys
Wafer Fabrication Data

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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.