AOZ2261QI-15

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The AOZ2261QI-15 is a DC-DC buck converter which is designed to deliver up to 15A currents over a wide input voltage range. It features both current-mode and voltage-mode operation for fast transient response, low input ripple and high efficiency drives for the synchronous rectifier. It is a monolithic integrated circuit (IC) which is ideal for buck converters. The AOZ2261QI-15 is part of the AONIC family of buck converters from Diodes Incorporated.

The AOZ2261QI-15 is typically used in applications where it is necessary to convert a higher unregulated DC voltage, such as a battery, to a lower regulated voltage. This voltage conversion occurs through the high-efficiency synchronous rectifier which switches on and off the output voltage based on the peak current demand and is controlled by the comparator and logic circuitry in the IC. This regulation usually takes place in the range of 1V-37V input and 0.8V-15V output voltage.

Working Principle: The AOZ2261QI-15 is a step-down monolithic switching regulator which regulates the output voltage by alternating between DC and AC voltage source by means of a field-effect transistor for the synchronous rectifier. During the switching process, the output voltage is regulated by detecting the voltage across the current sensing resistor which provides a feedback loop created by the auto-bandwidth PIN at the output of the IC. A peak current-limit comparator is utilized to properly control the output current and a low-resistance low-on-resistance (RDS) MOSFET is used in the synchronous rectifier to ensure high efficiency.

The AOZ2261QI-15 IC also has several features to increase efficiency, reduce EMI, and protect the IC from over-voltage and over-temperature conditions. These features include fixed-frequency oscillator, which helps reduce switching noise and improves system EMI performance; a high-side current-sense input, which helps to accurately calculate the load current and can be used for the current limit when the output current is above a set level; over-temperature and over-voltage detection circuits for improving system reliability; a soft-start function for smooth start-up; and a power-factor correction (PFC) circuit for reducing system energy consumption.

The AOZ2261QI-15 IC is suitable for applications in industrial control, telecommunications, office automation, automotive and other systems. With its high power density, high efficiency and reliable operation, it is an ideal choice for those applications requiring efficient and reliable DC-DC buck converter solutions.

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