AOZ1034PI#A

Overview

The AOZ1034PI is a synchronous buck regulator IC from the EZBuck family, manufactured by Alpha & Omega Semiconductor Inc. It operates within an input voltage range of 4.5V to 18V and delivers up to 4A of continuous output current. The output voltage is adjustable down to 0.8V. Key electrical parameters include a fixed switching frequency of 500kHz, internal high-side resistance of 60mΩ, and low-side resistance of 20mΩ. Efficiency reaches up to 95%. The device features cycle-by-cycle current limit, thermal shutdown, and pre-bias start-up capabilities. It is housed in a thermally enhanced 5x4 DFN-8 package with an exposed pad.

Feature Summary

• Synchronous rectification architecture for high efficiency
• Integrated protection mechanisms including thermal shutdown and short-circuit protection
• Fixed 500kHz PWM operation for simplified external component selection
• Adjustable output voltage starting from 0.8V

Applications

• Point-of-load (POL) regulation for embedded systems
• Industrial control power supplies
• Consumer electronics power management
• Communication equipment DC-DC conversion

Procurement Notes

Verify the specific suffix 'PI' against official Alpha & Omega Semiconductor documentation to confirm package type and temperature rating. Confirm end-of-life status as distributor data indicates this model may be obsolete. Ensure compatibility with existing PCB footprints for the 5x4 DFN-8 package. Check for RoHS compliance requirements if applicable to the final assembly. Validate supply chain availability through authorized channels due to potential discontinuation.

Selection Notes

Select this component when a compact, high-efficiency synchronous buck solution is required for inputs up to 18V. The 4A output capability suits moderate load applications. Consider the 500kHz fixed frequency for noise-sensitive designs where filtering is manageable. Evaluate the 60mΩ/20mΩ switch resistances for thermal performance under full load. Compare against the broader EZBuck family for alternative current ratings or pinouts if system constraints change.

Part Context

The AOZ1034 belongs to the EZBuck series of simple-to-use synchronous buck regulators. This family emphasizes ease of implementation with minimal external components. The PI suffix typically denotes a specific package variant, likely the 5x4 DFN-8 with exposed pad, optimized for thermal dissipation. It serves as a cost-effective power management solution for space-constrained designs requiring reliable DC-DC conversion.

Replacement Considerations

Publicly confirmed substitutes include AOZ1031, AOZ1033, and AOZ1036 from the same manufacturer. These variants offer different current ratings (3A or 5A) while maintaining similar EZBuck functionality. Verify pinout compatibility and thermal characteristics before substitution. Other manufacturers' synchronous buck regulators with comparable input/output specifications may also serve as alternatives.