TPS3824-33DBVTG4

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PMIC – Supervisors refers to the integrated circuits or modules which are used to monitor underlying signals of an integrated circuit and trigger certain action whenever the certain level of input signal is detected in order to prevent a detrimental situation to occur. Among the various PMIC – Supervisors, TPS3824-33DBVTG4 finds vairous appliactions and has advantageous working principles.

TPS3824-33DBVTG4, manufactured by Texas Instruments, is a 3 V active low supervisor and reset IC for multiple power domains. This PMIC – Supervisor will reset the system when the voltage of the power rail falls below the minimum operating voltage specified by the user. This supervisor utilizes a selectable timeout period in order to prevent system reset due to the fault in the power rail. Thus, it helps to make system reliable and robust.

Applications of TPS3824-33DBVTG4

TPS3824-33DBVTG4 PMIC – Supervisors can be used in various applications such as server, network switching and storage products, automotive, industrial and communication equipment, unified memory architecture (UMA) graphics boards, and various embedded applications that require multiple power rails.

In addition, server, storage and communication equipment powered by extended temperature range voltage rails can also benefit from using this PMIC – Supervisor.It is also utilized for different types of processor verification testing and its usage can be extended to power failures and over-voltage protection by selecting an appropriate reset delay period.

Working Principle of TPS3824-33DBVTG4

The working principle of TPS3824-33DBVTG4 is same as other PMIC – Supervisors.It monitors the input voltage and triggers the reset when the voltage falls below a specific threshold. This PMIC – Supervisor uses a high current strength reset as its output signal, which allows to reset low side devices like FETs and relays. It also uses a selectable delay time of up to 1.25 ms, which prevents the circuit from resetting due to minor spikes or glitches in the input signal.

In order to connect the TTL signal to the TPS3824-33DBVTG4, the user can use a simple RC filter network which can filter out the noise from the TTL signal.It also has a highly precise reset threshold that can be set from 0.90 V to 3.05 V with a single resistor.

The TPS3824-33DBVTG4 PMIC – Supervisor reduces the need for additional FETs, relays and other components in order to provide multiple power reset purposes. It also lacks a low power active mode, which helps in improving overall system’s efficiency. Additionally, it offers a maximum delay time of 1.25 ms in order to prevent unnecessary resets and provides a filter function to address issues with PSRR while maintaining the same reset threshold.

Protection Features of TPS3824-33DBVTG4

Other than resetting the system when the voltage falls below the minimum operating level, the TPS3824-33DBVTG4 PMIC – Supervisor also provides protection against over-current and short-circuit conditions.It has an active low reset function, which means that when the voltage falls below the threshold, it will output a low value.

This PMIC – Supervisor also offers an over-current detection system which will shut down the output voltage if current drawn from the rails exceeds the set limits. The TPS3824-33DBVTG4 provides a thermal protection system, which helps in preventing the over- heating of the device and the user can also set a reset delay to ensure enough time for the circuit to recover.

It also features an output open-drain reset which is used to trigger the reset of underlying devices like FETs and relays. Further, it also provides a watchdog timer that can be used to monitor the activity of the system and reset the output when required.

Conclusion

To conclude, TPS3824-33DBVTG4 PMIC – Supervisor provided by Texas Instruments is a reliable and efficient circuit which can be used to monitor the input voltage and reset the system when the voltage falls below the minimum operating level. It offers protection against different types of faults and errors, and it is suitable for a wide range of applications.

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