TPS3831G12DQNR

Product Overview

Category

The TPS3831G12DQNR belongs to the category of voltage supervisors.

Use

It is primarily used for monitoring and controlling the voltage levels in electronic systems.

Characteristics

• Voltage threshold accuracy: ±1%
• Low quiescent current: 1.5 µA (typical)
• Wide operating voltage range: 0.8 V to 10 V
• Adjustable reset time delay
• Power-on reset generator with fixed delay time
• Open-drain output
• Small package size: SOT-23-5

Package and Quantity

The TPS3831G12DQNR is available in a small SOT-23-5 package. It is typically sold in reels containing 3000 units.

Specifications

• Supply voltage range: 0.8 V to 10 V
• Reset threshold voltage options: 1.2 V, 1.8 V, 2.5 V, 3 V, 3.3 V, 5 V, and adjustable
• Operating temperature range: -40°C to +125°C
• Quiescent current: 1.5 µA (typical)
• Output type: Open-drain
• Reset time delay options: 100 ms, 200 ms, 400 ms, 800 ms, and adjustable

Pin Configuration

The TPS3831G12DQNR has the following pin configuration:

```

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| | --|VDD |-- --|GND |-- --|MR |-- --|DO |-- |____| ```

Pin descriptions: - VDD: Supply voltage input - GND: Ground reference - MR: Manual reset input (active-low) - DO: Open-drain reset output

Functional Features

1. Voltage Monitoring: The TPS3831G12DQNR continuously monitors the supply voltage and provides a reset signal when it falls below the programmed threshold.
2. Adjustable Reset Time Delay: The device allows users to set the delay time before generating the reset signal, ensuring stability during power-up or voltage fluctuations.
3. Power-On Reset Generator: It includes a fixed delay time for generating a reset signal upon power-on, ensuring proper initialization of the system.
4. Open-Drain Output: The open-drain reset output allows easy interfacing with other devices.

Advantages and Disadvantages

Advantages

• High accuracy in voltage threshold monitoring
• Low quiescent current consumption
• Wide operating voltage range
• Adjustable reset time delay for flexibility
• Small package size for space-constrained applications

Disadvantages

• Limited number of available reset threshold voltage options
• Manual reset input (MR) may require additional external components for proper functionality

Working Principles

The TPS3831G12DQNR operates by comparing the supply voltage against the programmed threshold voltage. When the supply voltage drops below the threshold, the device generates a reset signal. The reset signal remains active until the supply voltage rises above the threshold or a manual reset is triggered.

Detailed Application Field Plans

The TPS3831G12DQNR finds applications in various electronic systems where voltage monitoring and control are critical. Some potential application fields include:

1. Battery-Powered Devices: Ensuring proper operation and preventing damage due to low battery voltage.
2. Industrial Control Systems: Monitoring power supply voltages to prevent malfunctions or data corruption.
3. Automotive Electronics: Protecting sensitive components from voltage fluctuations and ensuring reliable operation.
4. Medical Equipment: Maintaining stable voltage levels to ensure accurate measurements and patient safety.
5. Communication Systems: Preventing data loss or system failures caused by voltage instabilities.

Detailed and Complete Alternative Models

1. TPS3830G12DQNR: Similar to TPS3831G12DQNR but with fixed reset threshold voltage of 1.2 V.
2. TPS3832G12DQNR: Similar to TPS3831G12DQNR but with fixed reset threshold voltage of 2.5 V.
3. TPS3833G12DQNR: Similar to TPS3831G12DQNR but with fixed reset threshold voltage of 3.3 V.
4. TPS3835G12DQNR: Similar to TPS3831G12DQNR but with fixed reset threshold voltage of 5 V.

These alternative models provide options for different voltage threshold requirements in various applications.

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