RT9818B-18GU3

PMIC - Supervisors

RT9818B-18GU3 is a supervisor from Richtek Technology Corporation which has highly integrated precision watchdog, reset timer and power-On reset functions with various configurations. It is an ideal device for monitoring power-on reset, reset and time-out reset of digital systems.

Application field

RT9818B-18GU3 can be used in a wide range of power supply monitoring applications. It is designed to monitor systems with secure communication and storage, such as automotive, industrial, home appliances and consumer electronics applications. It is also suitable for use in computer monitoring systems, including servers, motherboards, and embedded systems.

Working Principle

RT9818B-18GU3 features a wide operating voltage range from 1.8V to 5.5V, allowing it to effectively monitor the performance of voltage rail systems. The reset and watchdog function can be triggered either by time or signal level, depending on the required application. It also has a watchdog time-out period from 4.7 to 8.5 seconds, which can be adjusted through an external resistor.

For added reliability, RT9818B-18GU3 includes an option for a manual reset input, which allows the user to reset the device from the outside. When the manual reset input is triggered, the device will perform a reset of the system. This is useful for debugging and for emergency situations when the system needs to be manually reset.

RT9818B-18GU3 features an integrated Power-On Reset (POR) circuit which monitors and clears the system when power is first applied, resetting the timing and operation of the system. It also provides a safety feature which prevents the system from entering a dangerous state by performing a power-on reset when a voltage level exceeds the adjustable threshold.

Finally, RT9818B-18GU3 integrates a high-speed, low power, precision reset timer which allows the device to generate a reset signal when the user-selectable timeout period elapsed. The timer has an adjustable timeout period, which can be configured for up to 8.5 seconds.

Conclusion

RT9818B-18GU3 from Richtek Technology Corporation is a multi-functional supervisor device which integrates precision watchdog, reset timer and power-on reset functions. With its wide operating voltage range and its various adjustable timeout periods, it is well suited for various applications in automotive, industrial, home appliances and consumer electronics applications.