AOZ1019AI

Overview

The AOZ1019AI is a high-efficiency, simple-to-use 2A buck regulator from the EZBuck series by Alpha & Omega Semiconductor Inc. It operates within a 4.5V to 16V input voltage range and provides up to 2A of continuous output current with an adjustable output voltage down to 0.8V. The device features a fixed 500kHz PWM switching frequency and includes an internal 130mΩ PFET switch for high efficiency, reaching up to 95%. It is housed in a small SO-8 package and rated for ambient temperatures between -40°C and +85°C.

Feature Summary

• Integrates a 130mΩ internal PFET switch to achieve high conversion efficiency up to 95%.
• Includes comprehensive protection mechanisms such as cycle-by-cycle current limit, short-circuit protection, under voltage lockout, output over voltage protection, and thermal shutdown.
• Features internal soft start functionality to manage inrush currents during startup.

Applications

• Point of load DC/DC conversion
• PCIe graphics cards
• Set top boxes
• LCD panels

Procurement Notes

Verify the specific suffix 'AI' against official datasheets to confirm package type and temperature rating alignment. Ensure compatibility with existing PCB footprints for the SO-8 configuration. Confirm that the 500kHz fixed frequency meets system noise requirements. Validate component authenticity through authorized distribution channels to avoid counterfeit risks.

Selection Notes

Select this component when a compact, single-output buck solution is required for moderate current loads up to 2A. The fixed 500kHz frequency simplifies external component selection compared to adjustable frequency variants. Consider the SO-8 package constraints for thermal management in dense layouts. Evaluate if the non-synchronous design meets efficiency targets for the specific application voltage drop.

Part Context

The AOZ1019 belongs to the EZBuck family of simple, cost-effective buck regulators designed for ease of implementation. It serves as a streamlined alternative to complex programmable controllers, offering integrated power switches and essential protections in a minimal footprint. This series targets applications requiring reliable step-down conversion without extensive external circuitry.

Replacement Considerations

Check for direct pin-compatible upgrades within the EZBuck line, such as the AOZ1010 or AOZ1016, which share similar form factors and functionalities. Verify that substitute parts maintain the 2A current capability and 16V maximum input voltage limits to ensure circuit integrity without redesign.

FAQ

What is the fixed switching frequency of the AOZ1019?

The AOZ1019 operates at a fixed PWM switching frequency of 500kHz.

Does the AOZ1019 include internal soft start?

Yes, the device features internal soft start functionality to control inrush current during startup.