MP8865GQ-P

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The MP8865GQ-P is a high-efficiency monolithic switching regulator, which is classified as a DC-DC switching regulator and belongs to the family of PMIC (Power Management ICs). It is designed to provide a regulated output voltage that is adjustable, between 0.9 to 5.5V, with a maximum load current rating of 5A. The device also features current-limit, thermal protection, and voltage-regulation, making it an ideal choice for a wide range of applications. This article will provide an overview of the application fields and the working principle of the MP8865GQ-P.

Application Field

The MP8865GQ-P is primarily used for distributed power systems, to provide a reliable voltage source for low-power applications. It is suitable for use as a point-of-load (POL) regulator, providing precision voltage output from a single cell Li-ion battery. This makes the device particularly attractive for use in portable devices, such as mobile phones and tablet PCs, where efficient power management can significantly reduce the battery drain. In addition, the device can also be used for powering high-brightness LED backlight displays, as the MP8865GQ-P can provide a very stable output voltage for a wide range of voltage levels. The device is also particularly suitable for automotive applications, where the extra features (e.g. thermal protection and current-limit) can ensure reliable operation in extreme conditions.

Working Principle

The MP8865GQ-P utilizes a buck-boost topology, which allows it to receive input voltage from both below and above the desired output voltage. This means that the device can be used for applications where the input voltage is constantly changing. In order to achieve a regulated output voltage, the device utilizes a voltage-mode control architecture, which allows the output voltage to be set accurately and is immune to load transients and input voltage variations. The adjustable output voltage is set by an external voltage divider, and the output voltage is controlled by an internal feedback loop. The device also features a current limit circuit, which prevents excessive current from being drawn from the input source. Finally, the device also features an on-chip thermal sensor, which triggers as thermal protection circuit if the ambient temperature exceeds a preset threshold.

In summary, the MP8865GQ-P is a high-efficiency monolithic switching regulator designed for use in distributed power systems. It has a wide range of applications, from powering mobile phones and tablets, to providing reliable voltage for automotive applications. It utilizes a buck-boost topology and a voltage-mode control architecture, which allows the output voltage to be accurately regulated and provides current-limit and thermal protection features. As such, the MP8865GQ-P is a smart choice for a broad range of applications.

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