AOZ1036DI#A

Overview

The AOZ1036DI is a high-efficiency, easy-to-use 5A synchronous buck regulator from Alpha & Omega Semiconductor. It operates within an input voltage range of 4.5V to 18V and provides up to 5A of continuous output current with an adjustable output voltage down to 0.8V. The device features internal soft start, cycle-by-cycle current limit, pre-bias start-up, short-circuit protection, and thermal shutdown. It utilizes fixed 500kHz PWM operation and achieves efficiencies up to 95%. The component is available in thermally enhanced 5x4 DFN-8 and exposed pad SO-8 packages, rated for ambient temperatures from -40°C to +85°C.

Feature Summary

• Synchronous buck topology with integrated high-side and low-side switches
• Fixed 500kHz PWM switching frequency for compact external component sizing
• Comprehensive protection suite including thermal shutdown and short-circuit protection

Applications

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

Procurement Notes

Verify the specific suffix 'A' against official Alpha & Omega Semiconductor documentation to confirm if it denotes a specific tape-and-reel quantity, lead-free status, or environmental compliance variant distinct from the standard AOZ1036DI. Ensure the package type matches the required 5x4 DFN-8 or SO-8 form factor for the target application design.

Selection Notes

Select this regulator for applications requiring a compact solution with up to 5A output current from a 4.5V to 18V input source. The fixed 500kHz frequency allows for smaller inductors and capacitors compared to lower-frequency alternatives. Consider the thermal performance of the chosen package (DFN-8 vs. SO-8) based on the expected load current and ambient temperature conditions.

Part Context

The AOZ1036 belongs to the EZBuck family of synchronous buck regulators designed for simplicity and high efficiency. This series targets portable and consumer electronics where board space is limited. The DI suffix typically indicates the 5x4 DFN-8 package variant, offering improved thermal dissipation through an exposed pad compared to standard plastic packages.

Replacement Considerations

Check for direct pin-compatible replacements such as the AOZ1036PI if the SO-8 package is preferred over the DFN-8. Verify that any substitute maintains the 5A current rating, 4.5V-18V input range, and 500kHz switching frequency to ensure circuit compatibility without redesign.