MAX6389XS33D1+T

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PMIC - Supervisors

Power management integrated circuits (PMICs) are specialized semiconductor components for efficiently managing electricity supply and power distribution in addition to providing control signals for peripherals and related circuitry. Power supervisors, or voltage supervisors, are a type of PMIC used to detect and accurately inform the required circuitry when there is a power change and adjust the power supply accordingly.

MAX6389XS33D1+T

The MAX6389XS33D1+T is a voltage supervisor PMIC manufactured by Maxim Integrated. It can measure an input supply voltage and, based on a user-defined threshold, provide an output voltage to indicate an over- or under-voltage condition. The MAX6389XS33D1+T offers a built-in delay and hysteresis, making it suitable to accommodate unpredictable power changes in dynamic power environments.

Application Field

The MAX6389XS33D1+T power supervisor PMIC is designed for use in systems that require efficient management of power sources with a wide range of regulation and in systems with dynamic power requirements. Examples include power-sensitive lighting and home automation applications, battery-operated systems, automotive, industrial, and medical systems, and wireless devices such as cell phones, sensor networks, and remote monitoring systems.

Working Principle

When activated during power-on, the MAX6389XS33D1+T measures an input supply voltage and compares it to a programmable overvoltage and undervoltage threshold level, set using an external resistor. When the transducer detects a change in the supply voltage, it produces an appropriate output voltage, indicating the status of the power change. The supervisor includes a fixed hysteresis to ensure the supply voltage is stable before releasing reset. It also has a programmable power-on-reset delay that can be adjusted through an external capacitor.

Conclusion

The MAX6389XS33D1+T supervisory PMIC provides reliable power monitoring and protection in systems with unpredictable power requirements. The combination of overvoltage and undervoltage protection with a built-in hysteresis delay and reset delay make it ideal for an range of applications.

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