AOZ2263QI-10

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Part Status:	Active

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AOZ2263QI-10 Application Field and Working Principle

The AOZ2263QI-10 is a high speed synchronous buck regulator with a very small and low profile package, making it ideal for applications such as ultra-thin laptop computers, tablets, and smart phones. This device is part of PMIC – Voltage Regulators – DC DC Switching Regulators, and its main function is to provide a regulated output voltage while operating at high switching frequency, offering the best solution for space and thermal constrained designs.

The AOZ2263QI-10 has an input voltage range of 4.5V – 17V and an output range of 0.9V-5.5V. The device features a high switching frequency of up to 4MHz allowing for smaller inductor and capacitor sizes, reducing the overall system form factor as well as total solution cost. Efficiency is optimized with peak efficiency up to 95%. Its adjustable loop control provides accurate output voltage due to the internal voltage reference (VREF) over the full load range. Additionally, the device is protected with switch current limit protection and adjustable over current protection including cycle-by-cycle current protection, offering the best protection to the system.

Working Principle:

The AOZ2263QI-10 is a synchronous buck regulator, utilizing an N-channel MOSFET for both phases in the power conversion process. The device operates in PWM mode and includes internal soft start capability which prevents inrush current during startup. The control loop uses an internal voltage reference and feedback from the VOUT pin for voltage regulation. The output voltage is set through a divider network connected to VOUT.

The AOZ2263QI-10 includes cycle-by-cycle current protection, which detects load variations and limits load current during each cycle to prevent an excessive input current condition. Also, this device is protected against overtemperature shutdown, providing thermal protection to the system. When the device detects a power over temperature condition, it will enter to a thermal shutdown mode until the die temperature reduces below the threshold.

In summary, the AOZ2263QI-10 is a reliable and efficient DC-DC buck converter designed to provide a regulated voltage output in applications with a space and thermal constrained form factor. It operates at high switching frequency, offers a wide input and output voltage range, peak efficiency up to 95%, and provides built-in protection features for a complete, robust solution.

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