MAX820SCPE+

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Power management integrated circuits (PMICs) are widely used in today’s digital systems and other devices to ensure the reliability, accuracy and efficient operation of these devices. PMICs come in a variety of forms, including supervisors, LDOs, and DC/DC regulators.

One type of PMIC, the supervisor, is designed to protect digital systems from a variety of fault conditions, including brownouts, under-voltage, and over-voltage. The MAX820SCPE+ is a supervisor IC that can be used for a variety of applications.

Application Field

The MAX820SCPE+ is a voltage supervisor with high accuracy, low power consumption, and high reliability. It is designed to protect systems from brownouts, under-voltage, and over-voltage conditions by resetting or asserting a reset signal when the system voltage is out of the specified range. It can be used for a variety of applications, including automotive, industrial, medical, communications, and consumer electronics.

Working Principle

The MAX820SCPE+ is a CMOS voltage supervisor that monitors an input voltage and provides an active-low reset signal (RESET#) if the input voltage falls below the trip point, or rises above a second adjustable trip point. The device is designed to be powered directly from the system supply, and provides a reset signal when the system is outside of the specified range. Additionally, the device can provide advanced features, including adjustable reset pulse width, active-low reset delay, and output transistor protection.

The MAX820SCPE+ utilizes an internal voltage reference, combined with an onboard comparator, to detect under-voltage and over-voltage conditions. When an under- or over-voltage condition is detected, the internal comparator will assert the reset signal (RESET#). The reset signal will remain asserted until the supply voltage rises above or falls below the specified range. The user can also configure the reset pulse width, reset debounce period, and reset assertion hold time through the use of external components.

The MAX820SCPE+ also provides a wide range of features to enhance the reliability and accuracy of the voltage supervisor. These features include advanced fault protection, reverse-polarity and under-voltage lockout, EMI noise filtering, watchdog timing, and adjustable reset pulse width. Additionally, the device can be configured to provide a reset signal when the system is overheating, or when there is a short circuit or other fault condition.

The MAX820SCPE+ is a versatile and reliable voltage supervisor, and is ideal for a wide range of applications. Its low power consumption and high accuracy make it ideal for use in automotive, industrial, medical, and consumer electronics. The device’s on-chip features and adjustable reset pulse width make it well-suited for a variety of fault protection applications.

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