TPS1120DR

The TPS1120DR is a voltage supervisor and reset 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 ensures that the system operates reliably and prevents erratic behavior during power-up or power-down conditions.

Key Features:

1. Voltage Monitoring: The TPS1120DR monitors the supply voltage and generates a reset signal when the voltage drops below a predetermined threshold. This is crucial for maintaining the integrity of digital circuits.

2. Reset Output: The device features an active-low reset output, which is asserted when the supply voltage is below the threshold. This output remains low for a specified duration after the supply voltage returns to normal, allowing the system to stabilize before resuming operation.

3. Adjustable Threshold: The TPS1120DR allows for an adjustable reset threshold, making it versatile for various applications. This can be set using external resistors, enabling customization based on specific system requirements.

4. Low Power Consumption: The device is designed to operate with low power consumption, making it suitable for battery-powered applications. This efficiency helps extend the battery life of portable devices.

5. Wide Operating Voltage Range: The TPS1120DR can operate over a wide voltage range, typically from 1.5V to 5.5V, accommodating a variety of power supply configurations.

6. Temperature Range: The device is rated for operation over an extended temperature range, ensuring reliable performance in diverse environmental conditions.

7. Compact Package: The TPS1120DR is available in a small, surface-mount package (SOT-23), which is ideal for space-constrained applications. This compact design facilitates easy integration into printed circuit boards (PCBs).

8. Applications: Common applications for the TPS1120DR include microcontroller reset circuits, power management systems, automotive electronics, and any system requiring reliable voltage monitoring and reset functionality.

Electrical Characteristics:

• Supply Voltage (VCC): Typically operates from 1.5V to 5.5V.
• Reset Threshold Voltage: Adjustable, typically around 2.5V, but can be set according to application needs.
• Reset Delay Time: The duration for which the reset output remains low after the supply voltage returns to normal is typically in the range of milliseconds, ensuring adequate time for system stabilization.

Conclusion:

The TPS1120DR from Texas Instruments is a reliable and efficient voltage supervisor and reset IC that plays a critical role in ensuring the stability and reliability of electronic systems. Its adjustable threshold, low power consumption, and compact design make it an excellent choice for a wide range of applications, particularly in environments where power supply fluctuations can occur.