LTC4361HTS8-2

Product Overview

Category: Integrated Circuit (IC)

Use: The LTC4361HTS8-2 is a high voltage surge stopper designed to protect sensitive electronic devices from overvoltage transients. It provides robust protection against voltage spikes and surges, ensuring the safety and reliability of connected equipment.

Characteristics: - High voltage surge protection - Fast response time - Low quiescent current - Wide operating temperature range - Small form factor

Package: The LTC4361HTS8-2 is available in an 8-pin TSOT-23 package, which offers compact size and ease of integration into various electronic systems.

Essence: The essence of the LTC4361HTS8-2 lies in its ability to safeguard electronic devices by preventing excessive voltage from reaching them during transient events, such as power surges or lightning strikes.

Packaging/Quantity: The LTC4361HTS8-2 is typically sold in reels or tubes, with a quantity of 250 units per reel/tube.

Specifications

• Input Voltage Range: 2.5V to 5.5V
• Overvoltage Threshold: Adjustable from 2.6V to 5.7V
• Quiescent Current: 20µA (typical)
• Operating Temperature Range: -40°C to 125°C
• Maximum Continuous Current: 2A
• Reverse Battery Protection: Yes
• Fault Indicator: Yes

Pin Configuration

The LTC4361HTS8-2 features the following pin configuration:

```

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| | --| VIN GND |-- Pin 1: Ground --| FLT OUT |-- Pin 2: Output --| OV EN |-- Pin 3: Enable --| UV FB |-- Pin 4: Feedback --| OVSET GATE|-- Pin 5: Gate --| UVSET VCC |-- Pin 6: VCC --| UVSET GND |-- Pin 7: Ground --|___________| ```

Functional Features

1. Overvoltage Protection: The LTC4361HTS8-2 monitors the input voltage and quickly shuts off the output when an overvoltage condition is detected, preventing damage to downstream components.

2. Undervoltage Protection: In the event of an undervoltage condition, the LTC4361HTS8-2 disables the output to prevent improper operation of connected devices.

3. Reverse Battery Protection: The IC provides reverse battery protection, ensuring that the circuit remains safe even if the battery is connected with reversed polarity.

4. Fault Indicator: The integrated fault indicator pin (FLT) can be used to signal the occurrence of a fault condition, allowing for easy system monitoring and troubleshooting.

Advantages and Disadvantages

Advantages: - Robust surge protection for sensitive electronic devices - Fast response time ensures quick shutdown during transient events - Low quiescent current minimizes power consumption - Compact form factor enables easy integration into various applications - Wide operating temperature range allows for use in harsh environments

Disadvantages: - Limited maximum continuous current of 2A may not be suitable for high-power applications - Adjustable overvoltage threshold requires careful configuration for specific voltage requirements

Working Principles

The LTC4361HTS8-2 employs a combination of voltage comparators, MOSFET switches, and control logic to provide surge protection. It continuously monitors the input voltage and compares it to the user-adjustable overvoltage threshold. If the input voltage exceeds the threshold, the IC rapidly turns off the MOSFET switch, isolating the output from the high voltage source. Similarly, in the event of an undervoltage condition, the IC disables the output to prevent improper operation. The reverse battery protection feature ensures that the circuit remains safe even if the battery is connected with reversed polarity.

Application Field Plans

The LTC4361HTS8-2 finds applications in various fields where protection against voltage surges is critical. Some potential application areas include:

1. Power Supplies: Protecting sensitive electronic components in power supply units from voltage spikes and surges.
2. Industrial Control Systems: Safeguarding control systems and PLCs from transient events that can cause damage or malfunction.
3. Automotive Electronics: Providing surge protection for automotive electronics, such as infotainment systems and engine control modules.
4. Telecommunications: Protecting communication equipment, such as routers and switches, from voltage transients caused by lightning strikes or power grid fluctuations.

Alternative Models

1. LTC4361HTS8-1: Similar to LTC4361HTS8-2 but with a different overvoltage threshold range.
2. LTC4361ITS8-2: Package variant with extended