MCP112-240E/TO

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Introduction to PMIC - Supervisors

Power management integrated circuits (PMICs) are a class of integrated circuits (ICs) that are used in analog circuitry and digital signal processing designs. In short, these ICs manage the power supply to a system. As energy-consumption and heat dissipation have become an increasingly significant design challenge, PMICs offer many advantages such as decreased complexity, improved system reliability, and greater efficiency. The term “supervisor” is used to refer to a specific type of PMIC. These ICs are designed to provide supply-voltage monitoring, provide reset signals, detect power-fail signals, and watch battery voltages.

MCP112-240E/TO Application Field and Working Principle

The Microchip Technology MCP112-240E/TO is a low-power, high-efficiency monolithic voltage supervisor IC that provides a supervisory signal during power on or off conditions of electronic systems. The device is designed to accurately monitor a single input supply voltage, typically in the range of 1.2V to 4.4V, and quickly detect and indicate to other system components any changes observed in the monitored voltage within a specified voltage range. The device provides a manual reset input, a silicon-controlled rectifier (SCR) reset output, and a supervisor output pin. It is available in the 8-pin small outline package (SOIC).

The MCP112-240E/TO is best suited for low-voltage power systems, such as battery-powered systems, microcontroller-based systems, or other systems where low power consumption and high accuracy are required. The device also meets the requirements of UL/CSA standards. Some specific applications for the device include computer motherboards, programmable logic circuits, power supplies, telecommunications equipment, monitoring equipment, and embedded control systems.

The IC contains two comparators that are used with a single reference voltage and a single input voltage. The reference voltage is adjustable from 0.7V to 4.4V and up to 8.8V if the power supply is 5.1V or higher. The upper comparator is used for monitoring the input voltage and the lower comparator is used for resetting the IC. When the input voltage is greater than the upper threshold, the supervisor output is asserted and the SCR is disabled. When the input voltage is below the lower threshold, the supervisor output is de-asserted, SCR is enabled, and the manual reset is asserted. If the device is in a low power mode, the supervisor output and the SCR are disabled.

The MCP112-240E/TO includes a variety of features that make it suited for a wide range of applications. The device includes an active high manual input pin, which is used to manually assert the reset signal. Additionally, the device is equipped with a low current reset and active low reset flag, which triggers an interrupt when the supervisor output is de-asserted. The device also includes an SCR output, which can be configured as either an open drain or as a push-pull output, depending on the application. Additionally, the device features open drain outputs for reset and reset flag, which are designed for external pull-up resistors, allowing the device to be used in a variety of applications.

The MCP112-240E/TO is a highly efficient and low-power voltage supervisor IC, making it well suited for battery-powered systems or embedded control systems where low power consumption and high accuracy are required. The device includes a variety of features that make it highly configurable, allowing it to be used in a wide range of applications. The device is UL/CSA certified and is available in the 8-pin small outline package (SOIC).

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