MP3422GG-P

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Introduction to MP3422GG-P

The MP3422GG-P is a switching regulator from Monolithic Power Systems (MPS). It is a non-synchronous buck regulator specifically designed to serve as a charging solution for 3- to 4-cell Li-ion battery systems. The MP3422GG-P is a complete DC-DC synchronous buck converter, a regulator and an external sense resistor packaged in a single 8-pin SOP package. It provides an adjustable constant current for a high efficiency, low dropout operation with an output current of up to 2A. The MP3422GG-P offers an adjustable output voltage from 2.6V to 16V with an internal switch resistance of 0.25Ω.

Application Field

The MP3422GG-P is ideally suited for a wide range of applications such as industrial, automotive, and portable electronics where high current, low noise, low power consumption and high efficiency are required. It can be used for 3- to 4-cell Li-ion battery charging and supercapacitor charging applications. Additionally, due to its wide output voltage range, it can also be used in circuit designs that require higher output voltages such as LED driver, POE and GFCI protection.

Working Principle

The MP3422GG-P works according to the switching regulator principle. In this type of regulator, the voltage is regulated by periodically switching the power on and off to create an average voltage output. The precise regulation of the output voltage is achieved by utilizing a feedback loop, where the output voltage is measured, then compared with a reference voltage and the difference is used to drive a control signal that modulates the duty cycle of the switch. The length of the on and off times of the switch determines the output voltage of the regulator.

Advantages and Drawing

The MP3422GG-P has the following advantages: high efficiency (> 87%), low noise, low power consumption, wide input voltage range (2.6V-16V), adjustable output current up to 2A, and adjustable output voltage. Additionally, it is packaged in an 8-pin SOP package and is RoHS compliant. The figure below shows a pinout diagram of the MP3422GG-P.

Conclusion

The MP3422GG-P switching regulator from Monolithic Power Systems (MPS) provides a complete DC-DC buck converter solution for a wide range of applications including industrial, automotive and portable electronics. It offers adjustable output current up to 2A, adjustable output voltage range of 2.6V to 16V and very high efficiency up to 87%. It is an ideal solution for powering high-power applications and charging 3-4 cell Li-ion batteries.

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