MP28114DG-LF-P

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Introduction:

The MP28114DG-LF-P is a low-power integrated 3-A buck switching regulator. This integrated system-on-chip (SOC) is designed for low-power applications, providing lower quiescent current and improved efficiency with only one external capacitor. It offers a wide input voltage range of 2.7V to 16.5V, a two phase output voltage range of 0.8V to 3.6V, and an adjustable output current limit.

Applications:

The MP28114DG-LF-P is suitable for applications such as USB power supplies, mobile device power regulators, battery chargers, and automotive systems. This device is also ideal for buck-boost applications such as LED drivers, DCDC converters, and step-down applications. It provides an internal low-dropout regulator, which can be used as an output voltage reference source.

Working Principle:

The MP28114DG-LF-P utilizes a two-phase voltage-mode buck power converter. In this topology, two phases are controlled to produce a regulated output voltage by alternatingly feeding pulses to the output inductor from the two power switches (NMOS and PMOS). In the two-phase converter, a synchronous rectification is used to further improve the efficiency, from which a diode rectifier on the output is eliminated. In addition, the two-phase structure of the MP28114DG-LF-P allows for fast transient response and excellent output voltage accuracy without the need for an external voltage reference.

The MP28114DG-LF-P integrates a high-performanced, analog-controllerr PWM controller and a low-side MOSFET switch along with power MOSFETs to offer superior performance, reduced external parts count, and reliability. The device utilizes a constant on-time control scheme together with an adaptive output voltage slope that monitors the output voltage, resulting in improved light load efficiency. The device has multiple protection features including under-voltage lockout, thermal shutdown and over-current protection.

Conclusion:

The MP28114DG-LF-P is a low-power integrated 3-A buck switching regulator. This SOC is designed for low-power applications and offers excellent performance, low-power consumption, and high efficiency. The AUIRS2043S offers an integrated two-phase voltage-mode buck power switching regulator with an adjustable output current limit, a wide input voltage range, and an adjustable output voltage range. This device also integrates a high-performanced, analog-controller PWM as well as multiple protection features for improved reliability.

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