TPS3126E12DBVRG4

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Supervisors (also known as voltage regulators) are often used to regulate the output voltage of an electrical circuit, and the TPS3126E12DBVRG4 is a particularly popular option in PMIC applications. This supervisor is a 3-channel Positive Voltage supervisor that protects from rail over-voltage and under-voltage, and we’ll explore its applications and its working principle here.

Application Field

The TPS3126E12DBVRG4 is ideal for PMIC applications where its three channels can provide protection for three independent output supplies. This supervisor is particularly well suited for audio, automotive, communications, and computing applications. For these and other applications, the TPS3126E12DBVRG4 is a cost-effective solution that provides over-voltage and under-voltage protection, reducing the risk of system failure and costly repair or replacement should an unexpected power surge occur.

Working Principle

This supervisor is designed to operate on a 2.5V to 5.5V supply, making it suitable for a wide range of different PMIC applications. Its built-in N-Channel MOSFET provides over-voltage and under-voltage protection by switching off the output supply when the voltage exceeds or drops below specified levels.

These thresholds are adjustable to provide greater flexibility and increased safety. An internal sense resistor is used to sense the voltage at the output to indicate when the protection level has been tripped. When the protection level is tripped, an active-low inverting open-drain RESET signal is output which can be used to shut down other components in order to protect them from damage.

The TPS3126E12DBVRG4 also offers a low power consumption of only 40µA (maximum), with a power-on reset time of approximately 220 µs and the ability to operate in either continuous or one-shot reset mode. All these features combine to make the TPS3126E12DBVRG4 a reliable and effective voltage supervisor for PMIC applications.

Conclusion

The TPS3126E12DBVRG4 is an efficient and economical voltage supervisor for PMIC applications. It features three channels for providing over-voltage and under-voltage protection, an adjustable threshold for increased safety, a low power consumption, and an active-low RESET signal for shutting down other components should the voltage exceed or drop below the specified limit. Its wide range of features make it an ideal choice for a variety of different applications, ranging from audio and automotive systems to communications equipment and computing applications.

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