TPS3851G25EDRBR

Overview

Category: Integrated Circuits (ICs)

Use: Voltage Supervisors

Characteristics: - Monitors voltage levels and provides a reset signal when the voltage falls below a specified threshold - Low quiescent current consumption - Wide operating voltage range - Adjustable reset threshold - Programmable delay time - Power-on reset delay time of 200 ms - Small package size for space-constrained applications

Package: 6-WSON (2x2) package

Essence: The TPS3851G25EDRBR is an integrated circuit that functions as a voltage supervisor. It ensures stable operation of electronic systems by monitoring the voltage levels and generating a reset signal when the voltage falls below a predetermined threshold.

Packaging/Quantity: The TPS3851G25EDRBR is available in a 6-WSON (2x2) package. It is typically sold in reels or tubes, with a quantity of 2500 units per reel.

Specifications

The TPS3851G25EDRBR has the following specifications:

• Supply Voltage Range: 1.8 V to 5.5 V
• Reset Threshold Voltage Range: 1.6 V to 4.9 V
• Quiescent Current: 3 µA (typical)
• Operating Temperature Range: -40°C to +125°C
• Power-On Reset Delay Time: 200 ms (typical)
• Watchdog Timer Timeout Period: 25.6 s (typical)

Pin Configuration

The TPS3851G25EDRBR has the following pin configuration:

```

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| | --| RESET | --| GND | --| MR | --| VDD | --| VIT | |___________| ```

• RESET: Output pin for the reset signal
• GND: Ground reference
• MR: Manual reset input pin
• VDD: Supply voltage input
• VIT: Voltage input to be monitored

Functional Features

The TPS3851G25EDRBR offers the following functional features:

1. Voltage Monitoring: Monitors the voltage level at the VIT pin and compares it with the programmable reset threshold.
2. Reset Signal Generation: When the voltage falls below the set threshold, the device generates a reset signal on the RESET pin.
3. Adjustable Threshold: The reset threshold voltage can be programmed using external resistors.
4. Programmable Delay Time: The delay time between power-on and reset assertion can be adjusted using an external capacitor.
5. Low Quiescent Current: The device consumes minimal current during operation, ensuring efficient power management.

Advantages and Disadvantages

Advantages: - Wide operating voltage range allows compatibility with various systems. - Adjustable reset threshold provides flexibility in different applications. - Low quiescent current consumption minimizes power consumption. - Small package size enables usage in space-constrained designs.

Disadvantages: - Lack of built-in hysteresis may result in potential noise-related issues. - Limited number of available alternative models from the same manufacturer.

Working Principles

The TPS3851G25EDRBR operates based on a voltage monitoring principle. It continuously measures the voltage level at the VIT pin and compares it with the programmed reset threshold. If the voltage falls below the threshold, the device generates a reset signal on the RESET pin. This signal can be used to initiate system resets or perform other necessary actions to ensure stable operation.

Application Field Plans

The TPS3851G25EDRBR is commonly used in various electronic systems that require reliable voltage monitoring and reset functionality. Some of the application fields where this device finds utility include:

1. Microcontrollers and Processors: Ensuring proper power-on reset and voltage monitoring in embedded systems.
2. Industrial Control Systems: Providing fault detection and system reset capabilities in industrial automation applications.
3. Power Management: Monitoring power supply voltages to protect sensitive components from undervoltage conditions.
4. Automotive Electronics: Safeguarding critical automotive systems by detecting voltage anomalies and initiating appropriate actions.

Alternative Models

While the TPS3851G25EDRBR is a popular choice, there are alternative models available from other manufacturers that offer similar functionality. Some of the alternative models worth considering include:

1. MAX823: Voltage supervisor with adjustable reset threshold and watchdog timer.
2. LTC2937: Precision voltage monitor with programmable delay and adjustable threshold.
3. ADM6315: Microprocessor supervisory circuit with adjustable reset threshold and watchdog timer.

These alternative models can be evaluated based on specific requirements and design constraints to choose the most suitable option for a particular application.

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