DS1818R-5+T&R

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PMIC (Power Management IC) supervisors, also known as system supervisory ICs, are used for monitoring, controlling and preventing unexpected system failure conditions. The DS1818R-5+T&R is a high-performance PMIC supervisor widely used for a variety of electronic systems to ensure reliable and safe operation. This application note provides an overview on the general application field and working principle of the DS1818R-5+T&R.

Application Field of DS1818R-5+T&R

The DS1818R-5+T&R is designed as a comprehensive PMIC supervisor. It provides excellent system reliability and safety as a part of power management solution by monitoring volatages and resetting itself or the CPU when needed. Among its various applications, the DS1818R-5+T&R is widely used in system-level protection, which provides multiple configurable device protection features. It can effectively optimize systempower management and the circuit protection, derating and sequencing capabilities. Additionally, it is often used in low power, high-frequency communication circuits, display and imaging circuits, automotive electronics, industrial electronics, white goods, and consumer electronic systems.

Working Principle of DS1818R-5+T&R

The DS1818R-5+T&R consists of a power monitor, reset generator, voltage monitor, watchdog timer and clock generator. The power monitor supervises of the voltage levels of the system supply against over-voltage, under-voltage and power on reset (POR) conditions. The reset generator resets the system or CPU when an abnormal voltage is detected. The voltage monitor is used to detect a low-voltage level applied to the reset pin. The watchdog timer monitors the CPU inactivity or unpredictable behavior of the system by generating a reset after a predefined period of time. Finally, the clock generator uses an external clock or an internal oscillator to generate the clocks required by the system.

Conclusion

This application note provides an overview of the general application field and working principle of the DS1818R-5+T&R. It has been used in a variety of electronic systems, from low power, high-frequency communication circuits to automotive electronics, to ensure reliable and safe operation. It includes a power monitor, voltage monitor, reset generator, watchdog timer and clock generator. This PMIC supervisor provides excellent system reliability and safety as part of the power management solution.

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