AOZ5332QI-C_1

Overview

The AOZ5332QI is a high-efficiency synchronous buck power stage module integrating two asymmetrical MOSFETs and an internal driver. It supports a 2.5V to 25V input range with a 4.5V to 5.5V driver supply. The device delivers 50A continuous output current, up to 80A for 10ms pulses, and 120A for 10µs pulses. Switching frequency ranges from 200kHz to 2MHz. It features 3V/5V PWM compatibility, Tri-State support, UVLO, and thermal warning via the THWN pin.

Feature Summary

• Integrated bootstrap diode and optimized asymmetric MOSFETs for low capacitance and conduction loss.
• SMOD# control enables Diode Emulation mode for improved light-load performance.
• Adaptive logic provides shoot-through protection and optimized dead time.
• Open-drain THWN pin indicates over-temperature conditions exceeding 150°C.

Applications

• Memory and graphic cards
• VRMs for motherboards
• Point of load DC/DC converters
• Video gaming consoles

Procurement Notes

Verify the specific suffix against official documentation, as ordering codes may indicate variations in packaging or environmental compliance. Confirm the manufacturer part number matches the datasheet exactly. Ensure the component meets RoHS standards if required by the design specifications. Cross-reference the package type to ensure physical compatibility with the PCB footprint.

Selection Notes

Select this module for applications requiring high current density within a compact 5x5mm QFN footprint. Consider the thermal resistance characteristics when designing heat dissipation paths. Verify that the controller logic aligns with the 3V or 5V PWM input thresholds. Evaluate the switching frequency requirements against the module's operational limits to optimize efficiency.

Part Context

This component belongs to the DrMOS family from Alpha & Omega Semiconductor. It integrates power switches and drivers into a single package to reduce parasitic inductance. The design focuses on high efficiency and fast switching speeds suitable for modern digital power supplies.

Replacement Considerations

Consult official substitution lists for verified alternatives. Generic replacements may not match the integrated driver characteristics or thermal performance.

FAQ

How is Diode Emulation mode activated?

Diode Emulation mode is activated by pulling the SMOD# pin low, allowing asynchronous operation during light loads or startup.

What is the function of the THWN pin?

The THWN pin is an open-drain output that pulls low to indicate an over-temperature condition when the junction temperature exceeds 150°C.

Is the bootstrap diode external or internal?

The bootstrap diode is integrated directly into the driver circuitry within the package.