TPS3808G33DBVT: Low Quiescent Current, Programmable-Delay Supervisory Circuit

The TPS3808G33DBVT is a high-precision supervisory circuit designed and manufactured by Texas Instruments, specifically engineered to monitor power supplies in digital systems. This supervisory IC ensures that the system's microprocessor, FPGA, or other digital systems operate correctly during power-up, operation, and power-down. The device is characterized by its low quiescent current and programmable delay, making it an ideal solution for power-sensitive applications.

Featuring a fixed-sense threshold voltage of 3.3V, the TPS3808G33DBVT provides a precise monitoring solution for 3.3V power supplies. Its threshold accuracy is maintained over the entire temperature range, ensuring reliable operation under varying conditions. The device offers a programmable time delay, which is set via an external capacitor, giving designers the flexibility to tailor the supervisory delay to specific system requirements.

The TPS3808G33DBVT comes in a compact 6-pin SOT-23 package, making it suitable for space-constrained applications. Its low quiescent current of just 6.5 µA (typical) helps to minimize the power consumption of the overall system, which is particularly beneficial for battery-powered devices.

Key features of the TPS3808G33DBVT include:

• Fixed voltage threshold of 3.3V with high accuracy
• Programmable delay set by an external capacitor
• Manual reset input for system-level control
• Low quiescent current of 6.5 µA (typical)
• Watchdog timer for system fault protection
• Temperature range from -40°C to 125°C
• Supply voltage range from 1.7V to 6.5V
• Power-On Reset (POR) signal generator

The device also includes a manual reset feature that allows the system to be reset independently of the automatic monitoring, providing an additional layer of control. Additionally, an integrated watchdog timer improves system reliability by detecting and responding to system malfunctions.

Overall, the TPS3808G33DBVT is an excellent choice for designers looking for a low-power, highly accurate supervisory circuit with flexible delay options to enhance system stability and reliability. Its comprehensive features make it suitable for a wide range of applications, including portable electronics, wireless infrastructure, industrial control systems, and more.