The TPS3125J18DBVR is a highly reliable, low-power supervisory circuit designed by Texas Instruments to monitor power supplies in digital systems. It provides a critical function by asserting a reset signal whenever the VCC supply voltage drops below a preset threshold, ensuring proper system reset during power-up, power-down, and brown-out conditions.

Key Features

• Voltage Monitoring: This device keeps a vigilant eye on the supply voltage, activating the reset signal when the monitored voltage falls below the 1.8V threshold, tailored for systems operating at low voltages.
• Manual Reset: The TPS3125J18DBVR includes a manual reset input that allows the user to trigger a system reset with an external signal, providing additional control and safety.
• Power-On Reset Pulse: It generates a reset pulse lasting 200 ms (minimum) after VCC has risen above the reset threshold, ensuring the system has sufficient time to stabilize before starting operations.
• Low Supply Current: With a quiescent current of only 9 µA (typical), the device is optimized for battery-powered and low-power applications.
• Temperature Range: The supervisory circuit operates over a wide temperature range of -40°C to +85°C, suitable for industrial applications.

Applications

The TPS3125J18DBVR is versatile and can be used in numerous applications where reliable system monitoring is critical. These include:

• Portable/Battery-Powered Equipment
• Microcontrollers and Digital Systems
• Computers and Servers
• Embedded Systems
• Industrial Controls

Package and Availability

The device is available in a compact SOT-23-6 package, making it ideal for space-constrained applications. Its part number reflects the specific package type and threshold voltage, ensuring easy identification and procurement for design engineers and purchasers.

For more detailed technical specifications, application notes, and support documentation, please visit the Texas Instruments official website or contact their support team.