LTC2978
LTC2978
ObsoleteOctal Digital Power Supply Manager with EEPROM
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Overview
- 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
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
Documentation
Data Sheet 1
User Guide 1
Technical Articles 10
Informational 1
Product Information 1
Video 4
Device Drivers 1
This is the most up-to-date revision of the Data Sheet.
Software Resources
Device Drivers 1
Evaluation Software 0
Can't find the software or driver you need?
Hardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| LTC2977 | RECOMMENDED FOR NEW DESIGNS | 8-Channel PMBus Power System Manager Featuring Accurate Output Voltage Measurement |
Tools & Simulations
Linduino 2
LTpowerPlay®
LTpowerPlay® is a powerful, Windows-based development environment supporting Linear Technology's Digital Power System Management (PSM) products.
Open ToolLinduino 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.
Evaluation Kits
LTC2977, LTC2978A, LTC2978 Socketed Programming Board (Requires DC1613)
Resources
Software
Reference Designs
Part Used
