LTC2903CS6-A1#TRPBF

Product Overview

Category: Integrated Circuit (IC)

Use: The LTC2903CS6-A1#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: - Monitors power supply voltage - Provides reset signals - Watchdog timer functionality - Low power consumption - Small package size (SOT-23-6) - RoHS compliant

Package: SOT-23-6

Essence: The LTC2903CS6-A1#TRPBF is an essential component in electronic systems that require reliable power supply monitoring and reset functionality.

Packaging/Quantity: The LTC2903CS6-A1#TRPBF is typically available in tape and reel packaging, with 3000 units per reel.

Specifications

• Supply Voltage Range: 2.5V to 6V
• Reset Threshold Accuracy: ±1.5%
• Watchdog Timer Timeout Period: Adjustable from 1ms to 6.4s
• Quiescent Current: 10µA (typical)
• Operating Temperature Range: -40°C to 85°C

Pin Configuration

The LTC2903CS6-A1#TRPBF has six pins arranged as follows:

```

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| | --| VCC |-- --| GND |-- --| RESET |-- --| WDI |-- --| GND |-- |_______| ```

Pin descriptions: - VCC: Power supply input - GND: Ground reference - RESET: Active-low reset output - WDI: Watchdog input

Functional Features

1. Power Supply Monitoring: The LTC2903CS6-A1#TRPBF continuously monitors the power supply voltage. If the voltage falls below a preset threshold, the reset output is activated.
2. Watchdog Timer: The watchdog input (WDI) must be toggled within a specified timeout period to prevent the reset output from activating. If the WDI signal is not toggled within the set time, the reset output is triggered.
3. Adjustable Timeout Period: The timeout period of the watchdog timer can be adjusted using external components, allowing flexibility in system requirements.
4. Low Power Consumption: The IC operates with low quiescent current, minimizing power consumption and extending battery life.
5. Small Package Size: The SOT-23-6 package offers a compact form factor, making it suitable for space-constrained applications.
6. RoHS Compliant: The LTC2903CS6-A1#TRPBF is compliant with the Restriction of Hazardous Substances directive, ensuring environmental friendliness.

Advantages and Disadvantages

Advantages: - Accurate voltage monitoring - Adjustable watchdog timer timeout period - Low power consumption - Small package size - RoHS compliant

Disadvantages: - Limited number of pins for additional functionality - Requires external components for adjusting timeout period

Working Principles

The LTC2903CS6-A1#TRPBF operates by comparing the power supply voltage with a preset threshold. If the voltage drops below the threshold, indicating a potential power failure, the reset output is activated. The watchdog timer ensures that the system remains operational by requiring the WDI input to be toggled within a specific timeout period. If the WDI signal is not received within the set time, the reset output is triggered, initiating a system reset.

Detailed Application Field Plans

The LTC2903CS6-A1#TRPBF is widely used in various electronic systems that require reliable power supply monitoring and reset functionality. Some application fields include:

1. Embedded Systems: The IC ensures the stability of microcontroller-based embedded systems by providing accurate voltage monitoring and reset signals.
2. Industrial Automation: It is utilized in industrial automation systems to monitor power supply integrity and initiate system resets in case of voltage fluctuations or failures.
3. Telecommunications: The LTC2903CS6-A1#TRPBF plays a crucial role in telecommunications equipment, ensuring continuous operation by monitoring power supply conditions and triggering resets when necessary.
4. Medical Devices: Medical devices rely on the IC to maintain reliable power supply monitoring, safeguarding critical operations and patient safety.
5. Automotive Electronics: In automotive applications, the IC helps monitor the vehicle's power supply and initiates resets if voltage irregularities are detected.

Detailed and Complete Alternative Models

1. LTC2903CS6: Similar to LTC2903CS6-A1#TRPBF but without AEC-Q100 qualification.
2. LTC2903IS6: SOT-23-6 package variant