AOZ1034DI

Overview

The AOZ1034DI 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 switch resistance of 60mΩ, and low-side switch resistance of 20mΩ. The device supports positive output configuration and features cycle-by-cycle current limit, thermal shutdown, and pre-bias start-up capabilities.

Feature Summary

• Integrates synchronous rectification with internal high-side and low-side switches for high efficiency
• Includes protection mechanisms such as thermal shutdown, cycle-by-cycle current limit, and short-circuit protection
• Features internal soft start and pre-bias start-up functionality

Applications

• Point-of-load regulation in industrial equipment
• Power supply stages for consumer electronics
• Battery-powered devices requiring efficient step-down conversion

Procurement Notes

Verify component authenticity through authorized distribution channels due to potential counterfeit risks. Confirm package marking matches the 8-VDFN exposed pad specification. Check RoHS compliance status against current regulatory requirements. Ensure storage conditions adhere to moisture sensitivity level guidelines prior to soldering. Validate supplier documentation for traceability and quality assurance standards.

Selection Notes

Select this component when a compact synchronous buck solution is required for inputs up to 18V. The 500kHz fixed frequency allows for smaller external passive components compared to lower frequency alternatives. Consider the 8-VDFN package for space-constrained designs. Evaluate thermal performance based on expected load currents and ambient temperature conditions to ensure reliable operation within the specified -40°C to +85°C range.

Part Context

The AOZ1034DI belongs to the EZBuck series of simple-to-use synchronous buck regulators. This family focuses on minimizing external component count while maintaining high efficiency. The DI suffix indicates the 8-VDFN package variant with an exposed pad for improved thermal dissipation. It serves as a drop-in replacement for older non-synchronous or less integrated buck converter designs in similar voltage and current ranges.

Replacement Considerations

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