AOZ1051PI_3

Overview

The AOZ1051PI_3 is a high-efficiency, easy-to-use 3 A synchronous buck regulator from Alpha & Omega Semiconductor. It operates within an input voltage range of 4.5 V to 18 V and delivers up to 3 A of continuous output current with an adjustable output voltage down to 0.8 V. The device integrates a 70 mΩ internal high-side switch and a 40 mΩ internal low-side switch at 12 V, achieving efficiencies up to 95%. It features 500 kHz PWM operation, cycle-by-cycle current limit, pre-bias start-up, short-circuit protection, and thermal shutdown.

Feature Summary

• Integrates synchronous buck topology with low on-resistance internal switches for high efficiency
• Includes comprehensive protection mechanisms such as thermal shutdown and short-circuit protection
• Supports external soft start and pre-bias start-up capabilities

Applications

• Point of load DC/DC converters
• LCD TV power supplies
• Set top boxes
• DVD and Blu-ray players/recorders
• Cable modems

Procurement Notes

Verify the specific suffix _3 against official Alpha & Omega Semiconductor documentation to confirm package type or tape-and-reel specifications. Ensure compatibility with required input voltage ranges and thermal management solutions for the target application environment before procurement.

Selection Notes

Select this component for applications requiring a compact, high-efficiency step-down solution with integrated protection features. Consider the 500 kHz switching frequency for balancing component size and efficiency. Verify that the 3 A output current meets the load requirements and that the 4.5 V to 18 V input range aligns with the system power supply.

Part Context

The AOZ1051PI belongs to the EZBuck family of synchronous buck regulators designed for simplicity and performance. This series targets portable and consumer electronics where space and efficiency are critical. The PI suffix typically denotes the SO-8 package variant with an exposed pad for improved thermal dissipation.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.