LTC2901-3IGN#TRPBF

Product Overview

Category: Integrated Circuit (IC)

Use: The LTC2901-3IGN#TRPBF is a voltage supervisor and watchdog timer IC. It is designed to monitor the power supply voltage of electronic systems and provide reset signals when necessary.

Characteristics: - Voltage monitoring range: 0.4V to 5V - Adjustable reset timeout period - Low quiescent current consumption - Wide operating temperature range: -40°C to 125°C

Package: The LTC2901-3IGN#TRPBF is available in an 8-pin plastic dual in-line package (PDIP).

Essence: The essence of the LTC2901-3IGN#TRPBF is its ability to ensure reliable operation of electronic systems by monitoring the power supply voltage and generating reset signals when needed.

Packaging/Quantity: The LTC2901-3IGN#TRPBF is typically sold in reels, with 2500 units per reel.

Specifications

• Supply Voltage Range: 2.7V to 5.5V
• Reset Threshold Accuracy: ±1.5%
• Quiescent Current: 20µA (typical)
• Watchdog Timer Timeout Period: Adjustable from 6ms to 1024ms
• Power-On Reset Delay: 200ms (typical)

Pin Configuration

The LTC2901-3IGN#TRPBF has the following pin configuration:

```

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| | --| RESET |-- --| GND |-- --| VCC |-- --| WDI |-- --| TIMEOUT |-- --| GATE |-- --| RESET OUT |-- |___________| ```

• RESET: Active-low reset input
• GND: Ground reference
• VCC: Power supply voltage input
• WDI: Watchdog timer input
• TIMEOUT: Timeout period selection pin
• GATE: Enable/disable pin for the watchdog timer
• RESET OUT: Active-low reset output

Functional Features

1. Voltage Monitoring: The LTC2901-3IGN#TRPBF continuously monitors the power supply voltage and compares it to a user-defined threshold. If the voltage falls below the threshold, a reset signal is generated.

2. Watchdog Timer: The IC includes a watchdog timer that requires a periodic input signal (WDI) to prevent system lock-up. If the WDI signal is not received within the specified timeout period, a reset signal is triggered.

3. Adjustable Timeout Period: The timeout period of the watchdog timer can be adjusted using an external resistor and capacitor connected to the TIMEOUT pin. This allows flexibility in setting the desired timeout duration.

4. Low Quiescent Current: The LTC2901-3IGN#TRPBF consumes very low quiescent current, making it suitable for battery-powered applications where power efficiency is crucial.

Advantages and Disadvantages

Advantages: - Wide operating voltage range allows compatibility with various electronic systems. - Adjustable timeout period provides flexibility in system design. - Low quiescent current consumption helps conserve power in battery-operated devices. - Compact and easy-to-use package.

Disadvantages: - Limited number of available alternative models. - May require additional external components for specific applications.

Working Principles

The LTC2901-3IGN#TRPBF operates by continuously monitoring the power supply voltage and comparing it to a user-defined threshold. If the voltage drops below the threshold, indicating a potential power failure or instability, the IC generates a reset signal to initiate a system reset.

Additionally, the IC includes a watchdog timer that requires a periodic input signal (WDI) to prevent system lock-up. If the WDI signal is not received within the specified timeout period, the IC triggers a reset signal to restart the system.

The timeout period of the watchdog timer can be adjusted using an external resistor and capacitor connected to the TIMEOUT pin. This allows customization of the timeout duration based on specific application requirements.

Detailed Application Field Plans

The LTC2901-3IGN#TRPBF finds applications in various electronic systems where reliable power supply monitoring and reset functionality are essential. Some potential application fields include:

1. Embedded Systems: The IC can be used in microcontroller-based embedded systems to ensure stable operation by monitoring the power supply voltage and generating resets when necessary.

2. Industrial Control Systems: In industrial automation and control systems, the LTC2901-3IGN#TRPBF can provide critical voltage monitoring and reset capabilities to maintain system integrity.

3. Automotive Electronics: The IC can be employed in automotive electronics to monitor the vehicle's power supply and initiate resets in case of voltage fluctuations or failures.

4. Medical Devices: Medical equipment often requires precise power supply monitoring for patient safety. The LTC2901