MPQ2122GJ-Z

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PMIC - Voltage Regulators - DC DC Switching Regulators

The MPQ2122GJ-Z is an integrated monolithic DC-DC switching regulator that is offered in a TO-263 (D2-PAK) package. It is designed for high efficiency step-down converter applications that require low output voltage and large load current, and is widely used in 5V/12V/15V supply systems. The main feature of this device is a high-efficiency step-down switching regulator with overload protection.

Application Field

The MPQ2122GJ-Z is ideally suited for a wide range of applications including telecommunications, computers, consumer electronics, automotive, and wireless application. It is useful in 5V/12V/15V supply systems, as well as other voltage applications. It can also be used as a current source in either boost or buck configurations. It has the ability to meet a wide range of power requirements from low to high.

Working Principle

The MPQ2122GJ-Z switching regulator utilizes switch mode technology to regulate the output voltage. The output voltage is controlled by a feedback loop that compares the desired output voltage with the actual output voltage. The feedback loop then adjusts the switch mode controller to change the duty cycle of the power transistors. The output current is regulated via a constant-on-time control and is limited by an internal current limiting feature. The internal over-current protection (OCP) will shut down the power switch if the output current exceeds the set limit. This saves the load from being damaged in case of an overload.The MPQ2122GJ-Z also includes input and output under-voltage lockout (UVLO) capabilities, which will shut down the power switch when the input or output voltage drops below a predetermined value. This prevents the device from operating if one of the voltages is too low. Additionally, the device includes thermal shutdown protection, which will shut down the switch if the temperature exceeds a set limit. This helps protect the device from damage caused by overheating.The MPQ2122GJ-Z also features an enable pin (EN) to control the on/off operation of the device. This allows the user to control when the device is turned on or off. This pin can be connected to a logic signal, allowing the device to be turned on and off via external control.

Conclusion

The MPQ2122GJ-Z is an integrated monolithic DC-DC switching regulator that is designed for high efficiency and large load current applications. The device utilizes a switch mode design, combined with feedback loop, over-current protection, input and output under-voltage lockout, and thermal shutdown protection to ensure reliable operation. The device also offers an enable pin that allows the user to control when the device is turned on or off. This makes the MPQ2122GJ-Z ideal for 5V/12V/15V supply systems, as well as other voltage applications, and can also be used as a current source in either boost or buck configurations.

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