AOZ1053PI

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AOZ1053PI application field and working principle

AOZ1053PI is a buck converter DC-DC synchronous switching regulator. It is designed for general purpose battery powered applications, such as portable consumer electronics, wearable, and Internet of Things (IoT) devices. The device is housed in a space-saving 10-pin Power WSFET package, enabling a more compact solution. It has a wide input voltage range that makes it ideal for powering directly from Li-Ion battery.

AOZ1053PI\'s Voltage Regulators provides a complete solution for low-cost step-down applications. It contains four voltage regulators, which provide adjustable and fixed output voltages, as well as a high efficiency power MOSFET. It also includes a slew rate controlled PFM/PWM for improved efficiency and smaller footprint.

DC DC Switching Regulators

The AOZ1053PI DC-DC synchronous switching regulator can convert input voltages from 2.75V to 6.5V to output voltages of up to 4.2V. It has an adjustable switching frequency of up to 2 MHz and can provide an output current of up to 2A. The device features an integrated 4 A power MOSFET and delivers a maximum of 95% conversion efficiency. The external frequency synchronization allows the converter to be triggered by an external clock signal, and the low-side current sense feature provides current-on-demand protection. The device also has an adjustable soft start and a programmable input under-voltage lockout. In addition, it has cycle-by-cycle current limiting and thermal shutdown.

Application Field

The AOZ1053PI DC-DC synchronous switching regulator is suitable for a wide range of applications such as wireless cell phones, tablets, portable media players, smart meters, wearables and IoT devices. It is ideal for powering low-voltage circuits, peripheral logic, memory and microcontrollers in these applications. Other applications include portable medical equipment and test & measurement equipment, as well as point-of-sale terminals, automotive electronics and consumer electronics.

Working Principle

The AOZ1053PI DC-DC synchronous switching regulator is based on the principle of conversion of DC input voltage to a lower regulated DC output voltage. It consists of a synchronous rectifier, high-side MOSFET and a low-side power Schottky diode. The synchronous rectifier consists of two MOSFETs connected in parallel, one connected to the source terminal, the other connected to the drain terminal of the high-side MOSFET. The synchronous rectifier is driven by feedback from the output voltage of the regulator and is used to convert the input voltage to the required output voltage. The synchronous rectifier and high-side MOSFET form a buck converter, which regulates the output voltage. The low-side power Schottky diode serves to reduce the reverse-current and power dissipation.

In addition, the AOZ1053PI DC-DC synchronous switching regulator can be synchronized to an external clock to provide improved noise performance. It also features a low-side current sense that provides current on demand protection. Furthermore, the device has built-in over temperature protection and a programmable soft-start and input undervoltage lockout protection.

The AOZ1053PI DC-DC synchronous switching regulator is a versatile and powerful device with a wide range of applications. With its adjustable switching frequency, adjustable output voltage, low quiescent current and high efficiency, it is an ideal choice for battery powered devices and other applications requiring a powerful and reliable DC-DC converter.

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