MIC2044-2YTS-TR

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Power Management Integrated Circuit (PMIC) is an important component in modern technology. As its name implies, PMICs are widely used to manage, control, protect and monitor power systems. In this article, I will discuss the application field and working principle of the MIC2044-2YTS-TR, a type of PMIC and member of the Power Distribution Switches, Load Drivers family.

The MIC2044-2YTS-TR is a monolithic MOSFET integrated circuit designed to provide dual channel load switching in applications requiring high accuracy current limit protection and fast switching. It is capable of switching up to 1.2A of continuous current per channel and provides a low output on-resistance of < 50mΩ. The device has a wide operating voltage range of 2.8V to 16V and is operable from -40°C to +125°C.

In terms of applications, the MIC2044-2YTS-TR provides an ideal switching solution for industrial controls, automotive control systems, consumer electronics and white goods. These applications include motor driving, solenoid driving and current protection, as well as powering MCU and sensors. The device is also well-suited for power module, server and custom-built power bank applications.

The working principle of the MIC2044-2YTS-TR is based on a single charge pump circuit. The device utilizes the voltage from the load or the drain to supply internal bias power and therefore does not require external power. This feature allows the device to work in systems with only one power supply, while still being able to control the logic level between high and low. Once the input logic is triggered, the charge pump circuit produces an internal bias voltage on one of the two outputs. The bias voltage is supplied to either N-channel MOSFETs, depending on the logic level on the control pin, which allows the MOSFETs to turn ON or OFF, creating a closed circuit. To return the control pin to the state prior to the logic triggered, the charge pump circuit is reversed, creating a high or low logic on the control pin. This process happens quickly and is repeatable, allowing the device to operate efficiently switching between loads.

The MIC2044-2YTS-TR also provides thermal shut-down protection and current limit protection. Thermal shut-down is activated once the temperature exceeds 125°C, and the device will immediately turn off, preventing further damage or failure. Current limit protection is activated when the current exceeds its 1.2A threshold to further protect the system from over-current.

In summary, the MIC2044-2YTS-TR is a form of PMIC belonging to the Power Distribution Switches, Load Drivers family. It is used in a wide range of applications, and its operating principle is based on a single charge pump circuit. The device is also equipped with thermal shut-down and current limit protection to safeguard the system from overheating and over-current.

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