MCP111-290E/TO

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Power Management Integrated Circuits (PMICs) are a popular choice for a wide variety of applications, from embedded system design to automotive, industrial and aerospace applications. The MCP111-290E/TO is a general-purpose voltage supervisor IC, ideal for monitoring a system’s power supply voltage, over-voltage and under-voltage protection, and providing reset output.

This PMIC is classified as a supervisor, which monitors the voltage levels of your system and provides a unique action based on the voltage variation. This can range from being an output reset signal or a warning signal intended for the user. As such, MCP111-290E/TO supervisors are mainly used in applications such as base-stations, medical electronics, industrial control systems, computers, and other applications that require high reliable performance.

MCP111-290E/TO comes in two different packages: a SOIC-8 and an SOT-23-5, allowing for flexible and varied PCB layouts. You can adjust the threshold voltage level and the hysteresis window, as well as the reset output delay and the reset output active/inactive/forced level through an external resistor.

On the working principle side, the MCP111-290E/TO monitors the voltage level of the power supply and if the voltage level falls below the pre-set threshold voltage then the output is LOW (or "forced active"), otherwise the output is HIGH. The hysteresis window allows the IC to ignore any small voltage fluctuations and will not trigger the reset output until the voltage has been maintained below the threshold voltage for a certain amount of time.

The reset after power-up delay can be adjusted between 1.5ms and 6ms, depending on the value of the external resistor, which is then used to adjust the threshold. The delay is used to ensure that the IC has had enough time to properly monitor the power supply voltage before the reset output is triggered.

The reset output is open-drain and it can be either high level active or low level active, depending on which resistor is chosen. The reset output can also be forced active to perform a power-on reset, which is useful when the rest of the system is powered off and you want to ensure the system is properly resetted when powered back on.

In summary, the MCP111-290E/TO is a general-purpose voltage supervisor IC, and can be used as an over-voltage and under-voltage protection, or as a reset output, depending on the applications. You can easily adjust the threshold voltage, hysteresis, reset output delay and reset output type through external resistor, making it an ideal choice for a wide range of applications.

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