ZM331643CSTOB

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ZM331643CSTOB is a versatile power management IC (PMIC) designed by Zilog Corporation and designed specifically to be used as a supervisor controller in system power management applications. This application note explains its applications and its working principle.

Application Field

The ZM331643CSTOB PMIC is the ideal solution for applications requiring general-purpose power management and system reset or protection. This device can be used for powering logic circuits, resetting microcontrollers, issuing power-on reset upon system startup and providing system over-temperature protection.

The main features of the ZM331643CSTOB include an adjustable reset time-out (RTT) and power reset time-out (PRTT), an adjustable reset output voltage, a brown-out detector (BOD) with adjustable voltage and adjustable power-on delay (PD) time, and a temperature sensor.

It can be used in a wide variety of design applications such as automotive, medical, telecom, industrial, home and consumer electronics. In any of these applications, the device can be used to ensure reliable system protection and reset services.

Working Principle

The ZM331643CSTOB supervisor works by monitoring the power supply in the system and providing an active reset signal in case of a fault or disruption on the supply. It does this by sensing the supply voltage with the adjustable BOD and issuing either an active or a soft reset, based on the set parameters.

In addition to the adjustable reset delay, the PRTT and RTT parameters can be set to determine the reset delay and active reset output voltage according to the specific application’s requirements. The PRTT and RTT parameters are adjustable with the help of a serial data input line, allowing flexibility in setting the desired monitoring and reset conditions.

The device also features a temperature sensor that monitors the temperature of the system and signals the user when it reaches a predetermined temperature level. After the temperature is lowered, the reset signal is automatically deactivated.

Conclusion

The ZM331643CSTOB PMIC provides a versatile and powerful reset and monitoring solution for system applications. Its adjustable and programmable power reset timing and active reset voltage makes it a versatile and flexible power supervisor for designers who need reliable operation and system-level protection.

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