MCP120T-485I/SN

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PMIC, or Power Management Integrated Circuit, is a type of integrated circuit (IC) chip dedicated to the management of power semiconductor devices, such as DC/DC converters, voltage regulators, bridge rectifiers, and power MOSFETs. PMICs provide several power management functions including power regulation, monitoring, protection, and control for single or multiple power domains by combining the features, such as the minimum and maximum of input/output voltages, utilization current limiting, power good/fail signalling, and temperature control, of several different components into a single integrated circuit. PMICs are commonly found in cellular phones, laptop computers, personal digital assistants (PDAs), flat-panel displays, and embedded systems.

MCP120T-485I/SN is a type of PMIC - Supervisors. Supervisors are the category of PMICs that manage the power supply of embedded systems. They can monitor the voltage of the switching power supply and its temperature in real time, protect the system from temporarily losing power, open or close the circuit in the event of overvoltages, and make sure the system has enough power to respond quickly to user commands. The MCP120T-485I/SN in particular provides system reset, watchdog timer reset and reset control for microcontrollers. It has both manual and automatic reset functions, a watchdog timer for monitoring the microcontroller, and a voltage monitor for providing overvoltage protection.

When a power failure is detected, the MCP120T-485I/SN automatically asserts a reset signal that shuts down the system and causes the microcontroller to start again from the beginning. This reset is called a “power on reset” (POR) or “brown out reset” (BOR). The manual reset function can be used to test the functionality of the system when manual control is desired. The watchdog timer reset is connected to the microcontroller, and is used to detect whether the microcontroller has crashed and reset the system as necessary.

The MCP120T-485I/SN also features an overvoltage monitor that provides protection for the system from overvoltages. It senses input voltage from the power supply and uses a comparator circuit to generate an alert when an overvoltage is detected. This alert signal is then asserted to the microcontroller or system reset device, which shuts down the system. This protection is important to prevent system damage from high voltages.

In addition, the MCP120T-485I/SN provides delay and power-up reset functions. The delay feature eliminates the initial reset pulse generated by the power supply when it boots up, as it is often too short for the system to properly respond. The power-up reset function ensures that the reset signal remains active until all the required startup cycles are completed, at which point it can be disabled. This ensures that the system is properly initialized after the start up.

The MCP120T-485I/SN has a wide array of applications and is used in a variety of embedded systems, such as AC/DC adapters, personal computers, and consumer electronic products. This IC is designed for low power consumption, making it suitable for powering small, battery-operated applications such as mobile phones and PDAs. The integrated reset design and low power consumption also make MCP120T-485I/SN an attractive solution for many industrial, automotive, and medical applications.

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