LTC4257IS8#TRPBF

Product Overview

Category: Integrated Circuit (IC)

Use: Power Management

Characteristics: - High voltage Hot Swap controller - I2C compatible interface - Wide operating voltage range - Overcurrent and overvoltage protection - Fault detection and reporting

Package: 8-Lead SOIC (Small Outline Integrated Circuit)

Essence: The LTC4257IS8#TRPBF is a high voltage Hot Swap controller designed for power management applications. It provides protection against overcurrent and overvoltage conditions, while allowing for safe insertion and removal of circuit boards in live systems.

Packaging/Quantity: The LTC4257IS8#TRPBF is typically sold in reels containing 2500 units.

Specifications

• Operating Voltage Range: 9V to 80V
• Maximum Current Limit: 1A
• Overvoltage Threshold: Adjustable from 10V to 100V
• Fault Detection Response Time: <1µs
• I2C Interface: Compatible with 2-wire serial bus

Detailed Pin Configuration

The LTC4257IS8#TRPBF has the following pin configuration:

1. VCC - Power supply input
2. GND - Ground reference
3. FLT - Fault output
4. SDA - I2C data line
5. SCL - I2C clock line
6. ADJ - Overvoltage threshold adjustment
7. ILIM - Current limit setting
8. EN - Enable pin

Functional Features

• Hot Swap capability: Allows for safe insertion and removal of circuit boards in live systems.
• Overcurrent Protection: Monitors the current flowing through the load and shuts down the power if it exceeds the set limit.
• Overvoltage Protection: Detects excessive voltage levels and protects the load by shutting down the power.
• Fault Detection and Reporting: Provides a fault output signal to indicate abnormal conditions.
• I2C Interface: Allows for communication with other devices using the I2C protocol.

Advantages and Disadvantages

Advantages: - Enables safe insertion and removal of circuit boards in live systems, reducing downtime. - Provides protection against overcurrent and overvoltage conditions, safeguarding the load. - I2C interface allows for easy integration with other devices. - Adjustable overvoltage threshold provides flexibility in different applications.

Disadvantages: - Limited maximum current limit of 1A may not be suitable for high-power applications. - Requires additional external components for complete functionality.

Working Principles

The LTC4257IS8#TRPBF works by monitoring the voltage and current levels during the hot swapping process. It uses an I2C compatible interface to communicate with the system controller and report any faults or abnormal conditions. The overcurrent and overvoltage protection features ensure that the load is protected from excessive current or voltage levels. The adjustable overvoltage threshold allows for customization based on specific application requirements.

Detailed Application Field Plans

The LTC4257IS8#TRPBF is commonly used in various power management applications, including:

1. Server Systems: It enables hot swapping of server boards without interrupting the operation, ensuring continuous uptime.
2. Telecom Equipment: Used in telecom infrastructure to protect sensitive equipment during board insertion and removal.
3. Industrial Automation: Provides safe and reliable power management in industrial control systems.
4. Networking Devices: Enables hot swapping of network cards and modules in routers and switches.

Detailed and Complete Alternative Models

1. LTC4259: Similar hot swap controller with higher current limit (up to 5A).
2. LTC4260: Hot swap controller with integrated power MOSFETs for higher power applications.
3. LTC4258: Hot swap controller with adjustable undervoltage and overvoltage thresholds.

These alternative models offer different features and specifications to cater to specific application requirements.

Word count: 536 words