Product Overview: TPS3813K33MDBVREP from Texas Instruments

The TPS3813K33MDBVREP is a highly reliable, low-power supervisory circuit designed by Texas Instruments to monitor power supplies in digital systems. It provides a significant level of protection by ensuring that the system's microprocessor, FPGA, or other digital systems are reset to a known state during power-up, power-down, or brown-out conditions. This particular model is part of Texas Instruments' enhanced product (EP) portfolio, which means it is specifically designed to perform reliably in harsh environments, making it suitable for industrial, automotive, and military applications.

This supervisory circuit operates over a wide range of supply voltages, from 1.1V to 5.5V, and features a fixed-sense threshold voltage of 3.3V, tailored for monitoring 3.3V power supplies. The TPS3813K33MDBVREP has a low threshold voltage hysteresis and precision, which ensures accurate monitoring of the supply voltage. It boasts a low current consumption of typically 9 μA, contributing to the overall power efficiency of the system it is monitoring.

The device comes in a compact SOT-23-5 package, which is ideal for space-constrained applications. The TPS3813K33MDBVREP is characterized for operation over the extended temperature range of -40°C to 125°C, making it robust enough to operate in extreme conditions without compromising performance.

Key features of the TPS3813K33MDBVREP include:

• Manual reset input for system-level reset control.
• Open-drain RESET output, which remains asserted for 200 ms (minimum) after the monitored voltage has risen above the threshold level to ensure system stability.
• Watchdog timer functionality for additional system protection.
• Supply voltage supervision range of 1.1V to 5.5V.
• High threshold accuracy over temperature.

Overall, the TPS3813K33MDBVREP supervisory circuit is a vital component for systems that require high reliability and precision in voltage monitoring. Its robust design, low power consumption, and additional safety features make it an excellent choice for engineers looking to enhance system integrity in their critical applications.