MPQ4431GL-Z

MPQ4431GL-Z is a DC-DC step-down synchronous buck regulator from Monolithic Power Systems (MPS) designed to deliver up to 30A load current from an input voltage of 5.5V to 16V. It operates at switching frequency of 1.2MHz to reduce external component size and enables high efficiency up to 95%. This makes it an ideal solution for space-constrained, power-hungry applications such as enterprise centers, customer equipment, servers, and storage devices.

Application Field and Working Principle

The MPQ4431GL-Z is a DC-DC switching regulator that steps down the input voltage to a desired output voltage or current. It is widely used in industrial, automotive, and home appliance applications. It features gate drivers with separate power and independent logic control, provides fast transient response time, and adjustable soft-start. The device also includes a comprehensive protection circuit that safely shuts down the system if an over-temperature, over-voltage, or over-current condition occurs.

The working principle of the MPQ4431GL-Z is based on the switching regulator topology. The regulator consists of an input voltage, an inductor, capacitors, an output voltage, and an N-channel MOSFET. When the input voltage is applied to the regulator, the MOSFET is turned ON and OFF at fixed intervals. This ON/OFF pattern creates a switching waveform, whose frequency is determined by the magnitude of the input voltage. During the ON period, current is drawn from the input voltage and stored in the inductor. At the same time, current is supplied to the output capacitor and charges it. When the MOSFET is OFF, this stored energy is utilized to supply the output voltage.

The MPQ4431GL-Z is a versatile solution for high-current applications. It features a single-resistor adjustable output voltage and adjustable switching frequency. The adjustable output voltage makes it suitable for various applications, while the adjustable switching frequency helps to improve the reliability and efficiency of the system. It also features an embedded compensation network to ensure stability, and an adjustable soft-start to reduce the inrush current.

In addition, the MPQ4431GL-Z offers a low quiescent current for superior performance. The device is designed to meet the demand for high-efficiency, low-quiescent current, and small solution size. It is also designed to be used in adverse temperature environments, such as automotive systems and industrial applications.

Conclusion

The MPQ4431GL-Z is a high-efficiency DC-DC buck converter ideal for DDR3 and DDR4 memory systems, communications systems, and industrial applications. It provides fast transient response and adjustable soft-start, as well as adjustable output voltage and switching frequency for improved efficiency and reliability. It also offers a low quiescent current and is designed to work in adverse temperature environments.