Alternative Parts
Overview
Features and Benefits
- I2C/SMBus Serial Interface
- PMBus Compliant Command Set
- Configuration EEPROM with CRC
- Black Box Fault Logging to Internal EEPROM
- Differential Input, 16-Bit ΔΣ ADC with Less Than ±0.25% of Total Unadjusted Error
- Eight Voltage Servos Precisely Adjust Output Voltages Using Eight 10-Bit DACs with Soft-Connect
- Monitors Eight Output Voltages and One Input Voltage and Internal Die Temperature
- 8-Channel Sequencer
- Programmable Watchdog Timer
- Eight UV/OV VOUT and One VIN Supervisor
- Supports Multi-Channel Fault Management
- Operates Autonomously without Additional Software
- LTC2978 Can Be Powered from 3.3V or 4.5V to 15V
- Available in 64-pin 9mm × 9mm QFN package
- LTpowerPlay Configuration and Development Tool
Product Details
The LTC2978 is an octal, digital power-supply monitor, supervisor, sequencer, and margin controller. Eight output channels can be managed per user defined configuration settings. Supervisory functions include fault OV/UV threshold limits for eight output channels and one input channel. Programmable fault dependencies and responses allow the power supplies to be disabled with optional retry after a fault has been detected. Serial bus telemetry allows eight output voltages, one input voltage, die temperature and fault status to be monitored. In addition, odd numbered channels can be configured to measure the voltage across a current sense resistor. Power supply sequencing, precision point-of-load voltage adjustment and margining are supported with PMBus commands. A programmable watchdog timer monitors microprocessor activity for a stalled condition and resets the microprocessor if necessary. The 1-wire synchronization bus supports power supply sequencing across multiple LTC digital power devices. User programmable parameters can be stored in EEPROM. Faults and telemetry data can be logged to EEPROM for diagnostic analysis.
Applications
- Computers
- Network Servers
- Industrial Test and Measurement
- High Reliability Systems
- Medical Imaging
- Video
Product Categories
Product Lifecycle
Not Recommended for New Designs
This designates products ADI does not recommend broadly for new designs.
Evaluation Kits (1)
Documentation & Resources
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R544 Reliability Data3/26/2018
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DC1508B - Demo Manual6/24/2014
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Digital Power System Management4/4/2017
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I2C Programmable Multichannel Voltage Supervisors with EEPROM4/1/2015 LT Journal
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Experts Find There is More Analog in Digital Power Than Previously Thought2/13/2013
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Digital Power: Why Should I Care About Integration?12/4/2012
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DC/DC Controller Combines Digital Power System Management with Analog Control Loop for ±0.5% VOUT Accuracy10/1/2012 LT Journal
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Digital Power Debug9/20/2012
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Digital Power Sequencing8/14/2012
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Digital Power Management7/31/2012
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Digital Power Management Reduces Energy Costs While Improving System Performance4/1/2012 LT Journal
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Dual Output DC/DC Controller Combines Digital Power System Management with Analog Control Loop for ±0.5% VOUT Accuracy1/1/2012 LT Journal
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Power Management IC Digitally Monitors and Controls Eight Supplies9/1/2009 LT Journal
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Digital Power Management Done Right - Power Electronics Technology Aug 20098/3/2009
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.
Reference Designs (2)
Support & Discussions
LTC2978 Discussions
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.