AOZ1044PI

Series:	EZBuck™
Part Status:	Obsolete
Function:	Step-Down
Topology:	Buck

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AOZ1044PI Application Field and Working Principle

DC DC Switching Regulators, or DC-DC converters, are used to convert and regulate a DC source with one voltage level to one with another voltage level. The AOZ1044PI is a synchronous buck switching regulator which is designed to step down or regulate the voltage level of a DC power source for digital and low voltage analog applications.The AOZ1044PI is a single chip optimal power solution for embedded system power, providing high-efficiency power conversion in a small footprint package. It offers a wide input voltage range, high switching frequency and a wide output voltage range. It also provides an adjustable current limit, low average dissipation, efficient thermal performance, and the ability to adjust the output voltage.

Overview

The AOZ1044PI is a highly integrated, wide input voltage range, high frequency synchronous buck switching regulator. It is designed to provide a robust and reliable solution for embedded systems requiring a low profile, efficient, regulated DC output.The AOZ1044PI integrates an on-chip control logic, power MOSFETs and network, and offers low input ripple, high efficiency, adjustable current limit, soft start, as well as integrated over voltage protection. It is available in a 4 x 4 QFN package and requires no external Schottky diode.

Application Field

The AOZ1044PI is ideal for a number of applications, including laptops, PCIe cards, handheld devices, tablets, servers, communications platforms, and digital and low-voltage analog applications.

Working Principle

An input voltage is regulated to a lower regulated output voltage through an internal control loop. This loop includes an internal regulator, a feed forward amplifier, a comparator, and a gate driver. The regulator adjusts the current limits while the feed forward amplifier sets the output voltage. The comparator monitors the output and the gate driver controls the switch.The AOZ1044PI has a wide input voltage range from 4.5 V to 28 V and a wide output voltage range from 0.5 V to 5.5 V. It also offers adjustable current limit, soft start and adjustable thermal shutoff. The high switching frequency of the integrated power MOSFETs offers efficiencies up to 94%.

Conclusion

The AOZ1044PI is a cost-effective and high performance solution for embedded systems needing the efficient regulation of a DC power source with a wide input voltage range and a wide output voltage range. This PMIC provides adjustable current limit, low input ripple, and a thermal shutoff feature to ensure the device stays within safe operating temperatures. It also offers a high switching frequency to increase efficiency and reduce the size of the total solution. The AOZ1044PI provides power designers with a robust power solution for a variety of digital and low voltage analog applications.

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