MP21148GQD-P

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MP21148GQD-P Application Field and Working Principle

The MP21148GQD-P is an integrated DC/DC synchronous step-down switching regulator from Monolithic Power Systems (MPS) that is designed for use in a variety of applications making it an indispensable part of any PMIC-Voltage Regulators-DC/DC Switching Regulator lineup.

The MP21148GQD-P is a series of step-down switching regulators. It offers a high efficiency, the low operating temperature and small package outline ma king it an ideal choice for various mobile applications such as smart phones, tablets, and point-of-sale terminals. With a wide input voltage operation range of 4.0V to 28V, and output current capacity of up to 1.5A, the MP21148GQD-P can power most of today’s mobile applications. The switching regulator also features integrated soft-start, over-temperature, load transient protection and under voltage lockout (UVLO) functions, making it a reliable, cost efficient solution for step-down regulator designs.

The MP21148GQD-P synchronous buck regulator is capable of efficiency ratings as high as 96% under steady-state operation, and as high as 80% under light load conditions. This amazingly efficient solution uses a unique sleep mode to extend battery life and reduce system power consumption, entering sleep mode when output load is lower than the established threshold level.

The working principle of the MP21148GQD-P is based on a simple buck regulator topology. High frequency synchronous buck converters are capable of faster transient response allowing them to reach faster settling times. Referenced to ground, the MP21148GQD-P has one Power Good output and one positive input voltage. When in normal operation, the output voltage is regulated with settings done through a feedback loop. This loop comprises a current sense amplifier and a voltage feedback loop that controls the switching duty cycle of the power switch in order to maintain a regulated output voltage.

The input voltage is monitored through a separate voltage feedback loop. This loop controls an internal comparator which drives the gate of the power switch. The voltage feedback loop monitors the gate voltage and adjusts the average current to maintain a constant output voltage. The internal current sensing circuit measures the current through the internal power switch and maintains an accurate peak current during different operating conditions.

The MP21148GQD-P offers a wide input voltage operation range and high current output, In addition to its highly efficient power management, it also features many additional features such as output over current protection, voltage overflow protection, under voltage lockout (UVLO), soft start, and pulse frequency modulation (PFM). The addition of these features makes the MP21148GQD-P an ideal choice for sophisticated power management applications.

In short, the MP21148GQD-P is a series of efficient, highly integrated, and cost effective synchronous DC/DC step-down switching regulators from MPS. Suitable for a variety of different applications, these devices provide a comprehensive power management solution for portable devices such as smart phones, tablets, and point-of-sale terminals. By utilizing integrated protection circuits along with high efficiency ratings and a wide range of supported input voltages, the MP21148GQD-P converters make it possible to create reliable, cost efficient power solutions.

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