X4325S8-2.7A

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X4325S8-2.7A Application Field and Working Principle

Power Management Integrated Circuit (PMIC) systems provide smart power management solutions with features such as over-voltage and over-current protection, low dropout regulators, active clocking and sequencing control, as well as multi-source, multiple-output (MSMO) voltage regulation. Among all of these, the most essential type of PMIC is the Supervisor, which is built to protect consumers from damage caused by system faults like over-voltage, under-voltage, and shortage supply. The X4325S8-2.7A is a comprehensive re-set system based on microcontroller digital input and provides extensive combination of capabilities to protect system from instability, maintain steady-state performance, and timely alert of fault status.

1. Application Field

The X4325S8-2.7A is a high performance low voltage supervisor IC with adjustable threshold voltage, integrated power-on reset circuit, and voltage monitor module. It is suitable for a wide variety of applications, such as Power Supplies, Microcontrollers, and Embedded Systems, where power integrity is critical. This supervisor can provide four distinct reset functions: Watchdog timer reset, manual reset, VDD over voltage reset and VDD under voltage reset. It is an ideal solution for recovering the system from unexpected power supply issues and stabilizing the system from external disturbances.

2. Working Principle

The X4325S8-2.7A uses microcontroller digital technology to monitor the power supply voltage. The integrated comparator is configured to compare the voltage against the pre-defined voltage threshold which can be adjusted with an external resistor. When the voltage reaches or drops lower than the pre-defined threshold, the reset signal is generated which stops system operation and leads the system to power down. The reset signal can be used as an output to trigger other actions or can be used to reset the system to the initial state.

The X4325S8-2.7A also contains a watchdog timer function which requires periodic restarts. The watchdog timer is 16 bits wide and is user-programable to generate the reset signal when necessary. The WDT counter can be reloaded with a user-programmable value for the period of operation.

An operational mode input signal is also available in X4325S8-2.7A to put the unit into either a monitor or quad reset mode. This allows the user to control when and how the reset signal will be generated. Moreover, this device also features a supply reset function which can be used to detect an over-voltage or under-voltage condition. When the power supply voltage falls out of the defined range, the device generates the reset signal.

In addition, the X4325S8-2.7A is equipped with a power-on reset circuit which can be used to reset the system when the power is applied. The power-on reset circuit will be triggered when the voltage reaches beyond the factory set threshold.

The X4325S8-2.7A Supervisor IC provides comprehensive protection for all modern electronic systems. It is suitable for a wide variety of applications where power integrity is critical. This device provides essential reset functions and, thus, allows implementing reliable and cost-effective monitoring system.

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