TPS3851G33SDRBR

The TPS3851G33SDRBR is a voltage supervisor integrated circuit (IC) manufactured by Texas Instruments. It is designed to monitor power supply voltages and provide a reset signal to microcontrollers and other digital devices when the supply voltage falls below a specified threshold. This IC is particularly useful in applications where reliable operation is critical, such as in automotive, industrial, and consumer electronics.

Key Features:

1. Voltage Monitoring: The TPS3851G33SDRBR monitors a supply voltage and generates a reset signal when the voltage drops below a predetermined threshold. This ensures that the connected microcontroller or digital device does not operate under insufficient voltage conditions, which could lead to erratic behavior.

2. Fixed Threshold Voltage: The device has a fixed reset threshold of 3.3V, making it suitable for systems that operate at this common voltage level. This fixed threshold simplifies design considerations for many applications.

3. Active Low Reset Output: The reset output is active low, meaning that it goes low when the monitored voltage is below the threshold. This output can be connected directly to the reset pin of a microcontroller, ensuring that the device is reset when the supply voltage is inadequate.

4. Debounce Time: The TPS3851G33SDRBR includes a built-in delay feature that prevents false resets due to transient voltage dips. This debounce time can be adjusted to suit the specific needs of the application, providing stability in the reset signal.

5. Low Quiescent Current: The IC is designed to operate with low quiescent current, making it suitable for battery-powered applications where power efficiency is crucial.

6. Wide Operating Voltage Range: The device can operate over a wide range of supply voltages, typically from 1.0V to 5.5V, allowing it to be used in various applications beyond just 3.3V systems.

7. Small Package Size: The TPS3851G33SDRBR is available in a small, space-saving package (SOT-23), which is ideal for compact designs where board space is limited.

8. Temperature Range: The IC is rated for operation over an extended temperature range, making it suitable for use in harsh environments.

Applications:

• Microcontroller Reset Circuits: Ensures that microcontrollers start up correctly and operate reliably by providing a reset signal during power-up and power-down conditions.
• Power Supply Monitoring: Used in systems that require monitoring of power supply voltages to prevent malfunction due to voltage drops.
• Automotive Electronics: Suitable for automotive applications where voltage monitoring is critical for safety and reliability.
• Industrial Control Systems: Provides reset functionality in industrial equipment to ensure proper operation under varying voltage conditions.

Conclusion:

The TPS3851G33SDRBR from Texas Instruments is a versatile and reliable voltage supervisor that enhances the stability and performance of electronic systems. Its combination of fixed voltage monitoring, low power consumption, and small package size makes it an excellent choice for a wide range of applications requiring precise voltage supervision and reset functionality.