X5649S14-4.5A

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PMIC - Supervisors is a category of power management integrated circuits that have multiple functions to ensure the safe, reliable operation of the system. X5649S14-4.5A is a monolithic supervisor circuits specifically designed for battery-powered applications, offering precision limits with low quiescent current and a wide range of reset timing options. The X5649S14-4.5A supervision circuit has a variety of applications and superior performance characteristics that make it ideal for a wide range of applications.

Application field

The X5649S14-4.5A can be used in many areas including battery-powered instrumentation and remote control, portable appliances, portable medical equipment, and so on. It is also suitable for automotive applications, such as providing input voltage back drop protection for DC-DC converters and also providing watchdog supervisor functions for safety-critical automotive applications. Additionally, the X5649S14-4.5A also finds application as a supervisor in industrial automation equipment and computerized home appliances.

Working principle

The X5649S14-4.5A contains a low-drop voltage regulator, which is designed to source a regulated voltage at the VCC pin of the device. The regulated voltage is dependent on the input voltage and the value of the RSET resistor. This regulated voltage is compared to the reference voltage, which is derived from the value of the RSET resistor on the device. The output of the voltage regulator is also fed to the RESET pin of the device. Once the input voltage drops below the regulated voltage, the RESET pin is pulled low. The RESET pin remains low until the input voltage has returned to its normal level for a period of time determined by the values set in the RESET and WATCHDOG registers.

The X5649S14-4.5A also includes an internal WATCHDOG, which can be used to provide an additional level of safety and reliability for the system. The WATCHDOG is used to monitor the system by periodically toggling the output pin. If the system does not periodically toggle the output pin, the RESET pin is pulled low. The WATCHDOG can be programmed with a variety of timeout periods, which allows flexibility in designing the system.

Additional protection circuits, such as undervoltage lockout (UVLO) and up overvoltage protection (OVP) can also be integrated into the X5649S14-4.5A to protect the system from voltage transients and overvoltage conditions. The UVLO and OVP circuits can be programmed to meet the system’s requirements.

The X5649S14-4.5A supervisor circuit can also be used for system power sequencing. In this application, the supervisor monitors the input voltage and the output voltage of the supply rail to ensure that the sequencing of the power supplies is correctly performed. The sequencing delay and rising/falling thresholds can be programmed by the user to match the specific requirements of the system.

The X5649S14-4.5A supervisor circuit is an ideal solution for intelligent battery-powered and automotive applications where precision monitoring and protection is required. The variety of features, combined with the small size and low quiescent current make it an attractive solution for a wide range of applications.

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