TPS3851H50SQDRBRQ1

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The TPS3851H50SQDRBRQ1 is a Type 2 supervisory circuit that serves as a reset generator for the power-on sequence control in microprocessor (µP)-based systems. Designed to provide excellent reset accuracy and long reset pulse width at power-up, the supervisory circuit monitors power supplies from 1.6V to 5.5V and generates a reset signal to the µP when VCC has stabilized within the specified operating range. It also monitors µP activity and can generate a reset signal if the activity is too low or too high.

TPS3851H50SQDRBRQ1 is suitable for various applications in which the load has to be automatically energized or turned off, such as microcontroller systems, embedded applications, digital signal processing, and data storage. It can be used to generate the reset signal and assure that the µP is properly initialized upon power-up and during circuit operation. The reset signal is generated based on the external supply voltage, internal voltage reference, and the µP’s operating characteristics to ensure correct startup and proper operation of the µP.

The device features integrated watchdog timer and power-on reset (POR) with adjustable reset timeout period. The watchdog timer monitors the µP activity and can generate a reset signal if the µP is stuck or no longer processing data correctly. The POR monitors the supply voltage and resets the µP when the voltage drops below or rises above the specified reset threshold.

The device contains an integrated voltage detector with adjustable threshold and low power spending. The voltage detector monitors the output voltage of the power supply and can generate a reset signal when the voltage drops too low or rises too high. The device also includes a push-button circuit that can be used to manually generate a reset signal.

In addition, the TPS3851H50SQDRBRQ1 has an open drain active low output that generates a reset signal if a pin voltage falls below the factory set reset threshold. The reset signal can be tailored to the application by adding a capacitor between the output pin and the reset signal. The reset signal is active high when the voltage is above the reset threshold, and inactive when the voltage falls below the reset threshold.

Overall, the TPS3851H50SQDRBRQ1 is a highly efficient and accurate power supply supervisory circuit that can manage a variety of microprocessor-based systems. Its adjustable reset threshold and low power spending make it suitable for applications where continuous and reliable µP activity is required. With its integrated watchdog timer and POR, it can reliably detect and reset the µP when necessary. It also has an open drain active low output with an adjustable reset threshold and can generate a reset signal when needed. The reset signal can be tailored to the application using a small capacitor.

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