LTC2978ACUP

Product Overview

Category: Integrated Circuit (IC)

Use: Power System Management and Supervision

Characteristics: - High voltage, high current power system manager - Monitors, controls, and protects up to 16 power supply rails - Provides real-time telemetry of voltage, current, and temperature - Offers fault detection and reporting capabilities - Enables precise power sequencing and margining - Supports I2C/SMBus communication interface

Package: 48-Lead QFN (Quad Flat No-Lead) package

Essence: The LTC2978ACUP is a versatile power system management IC designed for monitoring and controlling multiple power supply rails in various applications.

Packaging/Quantity: The LTC2978ACUP is available in a 48-Lead QFN package. The quantity per package may vary depending on the supplier.

Specifications

• Input Voltage Range: 3V to 17V
• Operating Temperature Range: -40°C to 125°C
• Number of Channels: Up to 16
• Communication Interface: I2C/SMBus
• Fault Detection Thresholds: Programmable
• Current Monitoring Accuracy: ±1%
• Voltage Monitoring Accuracy: ±0.5%
• Package Dimensions: 7mm x 7mm x 0.75mm

Pin Configuration

The LTC2978ACUP features a 48-pin QFN package with the following pin configuration:

For a detailed pin description, please refer to the LTC2978ACUP datasheet.

Functional Features

1. Power Supply Monitoring: The LTC2978ACUP can monitor up to 16 power supply rails simultaneously, providing real-time telemetry of voltage, current, and temperature.

2. Fault Detection and Reporting: The IC offers comprehensive fault detection capabilities, including overvoltage, undervoltage, overcurrent, and overtemperature conditions. Detected faults can be reported through the communication interface.

3. Power Sequencing and Margining: Precise power sequencing and margining can be achieved using the LTC2978ACUP, ensuring proper startup and shutdown of multiple power rails.

4. I2C/SMBus Interface: The IC supports I2C/SMBus communication interface, allowing easy integration with microcontrollers or other digital devices.

Advantages

• High voltage and current handling capability
• Real-time monitoring and telemetry of multiple power supply rails
• Comprehensive fault detection and reporting features
• Precise power sequencing and margining capabilities
• Easy integration with digital systems through I2C/SMBus interface

Disadvantages

• Requires external components for complete power system management
• Limited to 16 power supply rails monitoring

Working Principles

The LTC2978ACUP operates by continuously monitoring the voltage, current, and temperature of each power supply rail connected to it. It compares these values against programmable thresholds to detect faults such as overvoltage, undervoltage, overcurrent, and overtemperature conditions. Detected faults can be reported through the I2C/SMBus interface for further action.

The IC also allows precise control of power sequencing and margining, ensuring proper startup and shutdown of multiple power rails in a desired sequence. This helps prevent any potential issues that may arise due to improper power sequencing.

Application Field Plans

The LTC2978ACUP finds applications in various fields where multiple power supply rails need to be monitored and controlled. Some potential application areas include:

1. Data Centers: Managing power distribution and monitoring in server racks.
2. Telecommunications: Monitoring and controlling power supplies in telecom infrastructure.
3. Industrial Automation: Supervising power systems in industrial control panels.
4. Automotive Electronics: Monitoring and protecting power rails in automotive applications.
5. Medical Devices: Ensuring reliable power supply management in medical equipment.

Alternative Models

1. LTC2978A-1: Similar to LTC2978ACUP, but with a different package option (e.g., 64-Lead LQFP).
2. LTC2978B: A variant with additional features such as digital-to-analog converters for margining and trimming.

Please refer to the Linear Technology website or contact the manufacturer for a complete list of alternative models.

Note: The content provided above is for illustrative purposes only and may not reflect the actual specifications or features of the LTC2978ACUP. Always refer to the official datasheet and consult with the manufacturer for accurate information.