TPS3805H33QDCKRG4 Voltage Supervisor by Texas Instruments

The TPS3805H33QDCKRG4 is a high-precision voltage supervisor designed by Texas Instruments, tailored to maintain system integrity by monitoring the supply voltage of digital systems. This device is particularly suitable for applications that require a high level of reliability and accuracy in voltage monitoring to prevent data corruption, system resets, or damage due to abnormal operating conditions.

With a fixed-sense threshold voltage of 3.3V, the TPS3805H33QDCKRG4 is optimized for systems that are powered by a 3.3V supply rail. It provides a tight accuracy of ±1.5% at room temperature and ±2.5% over the full temperature range of -40°C to 85°C, ensuring that the device operates effectively under various environmental conditions.

The device comes in a small, 5-pin SC-70 package, making it an excellent choice for space-constrained applications. Its low quiescent current of 6.5 µA (typical) also makes it suitable for portable and battery-operated equipment, where power conservation is critical.

One of the key features of the TPS3805H33QDCKRG4 is its built-in delay function, which prevents false triggering due to transient voltages, ensuring that the system only resets when necessary. The delay time can be adjusted by connecting an external capacitor to the CT pin, providing designers with the flexibility to tailor the supervisor to their specific needs.

The device offers an open-drain RESET output, which remains asserted for approximately 200 ms after the monitored supply voltage rises above the threshold level. This provides sufficient time for the system to stabilize before normal operation resumes.

Overall, the TPS3805H33QDCKRG4 by Texas Instruments is a robust and reliable solution for voltage supervision in a wide range of applications, including microcontrollers, DSPs, FPGAs, and other digital systems that require precise voltage monitoring. Its small footprint, low power consumption, and customization options make it a versatile component for ensuring system stability and performance.

To learn more about the TPS3805H33QDCKRG4, visit the Texas Instruments website for detailed specifications, application notes, and support resources.