MAX800MCPE

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MAX800MCPE: PMIC Supervisors

Power Management Integrated Circuit (PMIC) Supervisors are used to monitor and protect the microcontroller-controlled system (MCU) from unexpected faults and high voltage transients. The MAX800MCPE on-chip supervisor is a small, low-power, integrated circuit which optimally monitors a variety of fault conditions, provides system power fail and low power sources, and drives a reset warning flag. Additionally, it derives one or more external reset inputs and two method-of-operation (MOP) signals, and enables debouncing and sampling of up to four system control buttons.

The main application fields and working principle of the MAX800MCPE are as follows:

Applications

The MAX800MCPE is suitable for use in applications with a wide voltage range, from 0.9V to 5.25V. It is designed for system/rail monitoring, and is typically used with positive or negative-voltage source regulators. It can also be used with primary and secondary lithium-ion batteries, and with tantalum-capacitor-based tracking, boost converters and LED drivers.

The MAX800MCPE is commonly used to monitor power failures and can be used in the automotive and office imaging environment, supporting automotive and CCD cameras. It can also be used to design voltage monitor circuits, circuit protection circuits, regulators, and PWM controllers in the industrial control, automotive, imaging, and consumer markets.

Operation Principle and Working Logic

The MAX800MCPE monitors the input voltage supply and generates an "OK" signal when the voltage is in the required safe range. This signal can be used both to reset the microcontroller, as well as to indicate that the power supply is on and the microcontroller is powered up.

The MAX800MCPE also features an external reset input, which can be triggered by external sources such as buttons, switches, or sensors. It can also be used to monitor user-selectable time-out settings, such as those required for power sequencing.

The MAX800MCPE uses two methods of operation (MOPs) for monitoring the power supply. The first is a single status bit that determines whether the input is within the expected range. The second is a fault-tolerant logic system, in which the MAX800MCPE monitors multiple voltage signals before generating an alarm signal.

The low-power MAX800MCPE requires no extra power for its operation, with only 162 µA at 5V and 90 µA at 2.5V, allowing it to be used in a wide range of applications.

Benefits of MAX800MCPE

The MAX800MCPE is a small, low-power, integrated circuit with a variety of fault protection features. It provides system power fail and low power detection, drive a reset warning flag, and offer monitoring of up to four system control buttons. It also features extremely low power dissipation and excellent voltage accuracy.

The MAX800MCPE is suitable for applications with a wide variety of sources, including primary and secondary lithium-ion batteries, tantalum-capacitor-based tracking, boost converters, and LED drivers. Its on-chip design allows for simple integration into existing circuits, offering improved reliability and a greater level of protection against unexpected faults.

Overall, the MAX800MCPE is an excellent solution for monitoring a variety of input voltages, providing easy integration with existing microcontrollers and offering protection against unexpected faults.

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