AOZ1051PI

Overview

The AOZ1051PI is a synchronous buck regulator from Alpha & Omega Semiconductor, operating within a 4.5 V to 18 V input voltage range. It delivers up to 3 A of continuous output current with an adjustable output voltage down to 0.8 V. The device features internal high-side and low-side switches with resistances of 70 mΩ and 40 mΩ respectively at 12 V input. It operates at a fixed 500 kHz PWM frequency and achieves efficiencies up to 95%. Key protection mechanisms include cycle-by-cycle current limit, short-circuit protection, and thermal shutdown.

Feature Summary

• Synchronous buck topology with integrated high-side and low-side power switches
• Adjustable output voltage capability starting from 0.8 V
• Integrated protection against overcurrent, short circuits, and thermal overload
• External soft-start control for managed power-up sequences

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 manufacturer datasheet for the AOZ1051PI to confirm current production status and pinout compatibility. Ensure that the external component selection matches the required input and output specifications defined in the official documentation. Cross-reference the package type and thermal requirements during integration planning.

Selection Notes

Select this component when a compact synchronous buck solution is required for inputs between 4.5 V and 18 V. It is suitable for applications needing up to 3 A output current with high efficiency. Consider the exposed pad SO-8 package for thermal management and verify that the 500 kHz switching frequency aligns with system noise constraints.

Part Context

The AOZ1051PI belongs to the EZBuck family of regulators by Alpha & Omega Semiconductor. This series focuses on providing high-efficiency, easy-to-use power conversion solutions for portable and consumer electronics. The part integrates necessary power stages to minimize external component count while maintaining robust performance characteristics.

Replacement Considerations

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