MP1471AGJ-P

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The MP1471AGJ-P is a synchronous step-down DC-to-DC switching regulator controller manufactured by MPS. It is a power management integrated circuit (PMIC) specifically designed for voltage regulator applications, more specifically DC-to-DC switch mode regulators. This type of regulator converts a high input voltage to a lower constant output voltage with the help of industry standard switching techniques.

It is a high-performance, inductor-based switching regulator controller manufactured in a 3-MHz switching frequency, using much less external components compared to a conventional buck topology with an optimal efficiency and low operating current. Its main features consist of wide input voltage range and current limit protection, enabling tight output voltage accuracy and no-load Steady State power optimization. Its input voltage range is typically 4.65 V to 16 V and its output voltage range is typically 0.8 V to 12 V.

The MP1471AGJ-P provides advantages to circuit designs regarding the size, cost and power loss reduction by reducing components. Its controller integrates all the features and functional blocks needed for synchronous buck operation, allowing an easy and fast design of an application. Also, the protection functions inside it provide a complete protection for the controller and other components in the circuit.

The main principle of operation of the MP1471AGJ-P is based on a generic synchronous buck topology, whereby a high-side MOSFET and a low-side MOSFET are used to regulate the output voltage. The controller bridges these two MOSFETs by providing drive signals for both according to the output voltage and current of the application. The controller converts the output voltage to a constant voltage based on an internal error amplifier.

When the power switch turns on, the internal high-side MOSFET driver shows a fast rise time, with a smooth switching transition, taking into account the power switch’s parasitic inductance. With this shut-off time, its turn-off time is also kept short, limiting power losses and heat dissipation. The MP1471AGJ-P also includes built-in current-limit and temperature-limit protections, allowing it to be suitable for applications such as step-down DC/DC converters, LED drivers and power supplies.

In summary, the MP1471AGJ-P is a synchronous step-down DC-to-DC switching regulator controller designed for voltage regulator applications. Its main features include wide input voltage range, small external components, tight output voltage accuracy and protection functions. Its primary principle of operation is based on a generic synchronous buck topology whereby a high-side MOSFET and a low-side MOSFET are triggered by a set of drive signals to generate a constant output voltage. As a result, the MP1471AGJ-P is suitable for applications such as step-down DC/DC converters, LED drivers and power supplies.

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