DS1708REPA

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PMIC - Supervisors: DS1708REPA Application Field and Working Principle

PMIC (Power Management Integrated Circuit) supervisors are popularly used in a wide range of communication and computing applications, providing reliable and robust monitoring for timeouts and system hangs. DS1708REPA is a PMIC supervisor designed for 5V systems with built-in VDD supply monitor, watchdog timer, and push-pull reset output. This supervisor’s application field can be seen in bridge and gateway applications, such as routers, switches, and access points.

In terms of its working principle, the DS1708REPA consists of two main functional blocks. Firstly, it has a fixed 5 volt monitoring supply that is designed to supervise the primary power supply to the system. The output of this fixed 5volt is monitored through an internal voltage divider, allowing the supervisor to detect when there is any faults in the system. Secondly, it has a watchdog timer circuit that is designed for timeout and system hang monitoring. This watchdog timer is connected to an external resistor and capacitor network, which can be tuned to produce output pulses after a specific time out period. If the system halts, the watchdog circuit will reset the system in order to restore normal operation.

In addition, the DS1708REPA also has three other functional blocks. An open drain reset output, RC network for adjustable watchdog timeouts and a push-pull reset output are all integrated within this supervisor. The reset output features an open drain reset output of 5V, while the RC network provides programmable watchdog timeouts as long as 200miliseconds. Last but not least, the push-pull reset output is designed to provide an additional layer of protection against floods in the event of system failure.

To sum up, the DS1708REPA can provide a high level of reliability and robustness in bridge and gateway applications. By providing an integrated 5V supply monitoring, watchdog timer and push-pull reset output, this PMIC supervisor is able to detect any faults in the system and reset the system if necessary. Additionally, its adjustable watchdog timer, as well as its open drain reset output and push-pull reset output, are able to provide extra protection from system failures. Taken together, all of these features make the DS1708REPA an ideal component for any application that requires a robust, power-efficient and reliable monitoring solution.

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