MP4431GL-Z

MP4431GL-Z Application Field and Working Principle

The MP4431GL-Z is a low-voltage, high-efficiency DC-DC switching regulator designed for general-purpose use in all types of applications, from low-power systems to high-load systems. With its small size and wide input voltage range, the MP4431GL-Z is applicable to a variety of applications from notebooks, mobile phones and other portable devices to automotive navigation systems.

The MP4431GL-Z operates as a buck (step-down) regulator, converting a higher input voltage to a lower, regulated output voltage. It is constructed with a P-Channel MOSFET for the high-side and an N-Channel MOSFET for the low-side switch. The MP4431GL-Z also features an adjustable switching frequency range of 1.8 MHz up to 2.5 MHz, and a maximum duty cycle of 95%.

The MP4431GL-Z features several features that make it attractive to a variety of applications. It includes a 0.5 A current limit, which prevents output current from exceeding the limit, and a short-circuit shutdown. In the event of an over voltage condition, the MP4431GL- Z will shut down, protecting the equipment from damage. It also includes under-voltage lockout and over temperature protection, which ensures that the regulator will not function if too little input voltage is present, or if the temperature rises too high.

To ensure stability and a precise output voltage, the MP4431GL-Z features voltage feedback regulation. An internal voltage reference and error amplifier circuit detect and compare the output voltage to the reference voltage, and adjust the duty cycle according to the error. An external loop compensation capacitor can be used to adjust the DC gain and response frequency to fine-tune the output voltage and overshoot.

In sum, the MP4431GL-Z is a cost-effective, low-voltage DC-DC switching regulator suitable for a variety of applications. It offers efficient, reliable and precise voltage regulation, and provides all the necessary features to ensure safe and reliable operation.