AOZ5332QI_5

Overview

The AOZ5332QI is a high-current, high-performance DrMOS power module from Alpha & Omega Semiconductor Inc. It integrates two asymmetrical MOSFETs and an integrated driver for synchronous buck applications. The module supports a 2.5V to 25V power supply range and a 4.5V to 5.5V driver supply range. It delivers 50A continuous output current, with peak capabilities of 80A (10ms pulse) and 120A (10us pulse). Operating frequencies reach up to 2MHz. The device features a low-profile 5x5 QFN-31L package and includes protections such as under-voltage lockout and thermal warning.

Feature Summary

• Asymmetrical MOSFET optimization: High-side optimized for fast switching with low capacitance; Low-side optimized for ultra-low ON resistance to minimize conduction loss.
• Integrated bootstrap diode and gate drivers within the package to minimize parasitic loop inductance and optimize switching performance.
• Diode emulation mode support via SMOD# pin to enable asynchronous operation and improve light-load efficiency.
• Compatible with 3V and 5V CMOS logic PWM inputs, supporting Tri-State functionality.

Applications

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

Procurement Notes

Verify the exact part number against official manufacturer documentation, as suffixes may indicate specific packaging or environmental compliance variations not detailed in general descriptions. Confirm RoHS compliance status directly with the supplier or datasheet revision history. Ensure that the ordering information matches the required ambient temperature range and package type specified in the official product specifications before finalizing procurement.

Selection Notes

Select this component for high-density power designs requiring efficient synchronous buck conversion. Consider the 50A continuous current rating and 2MHz switching capability for compact form factors. Evaluate PCB layout requirements carefully to manage high dv/dt and di/dt transients, ensuring adequate copper area for VIN and PGND pads for thermal dissipation. Verify compatibility with 3V/5V logic controllers and check if diode emulation mode meets system light-load efficiency targets.

Part Context

The AOZ5332QI belongs to the DrMOS (Driver-MOSFET) family, which integrates power switches and drivers into a single module. This integration reduces board space and improves reliability by minimizing external parasitic inductances. It is designed for high-efficiency power delivery in computing and graphics applications where size constraints and thermal management are critical.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided source material.

FAQ

How does the AOZ5332QI handle light-load conditions?

The AOZ5332QI can operate in diode emulation mode (pulse skipping) when the SMOD# pin is pulled low. This enables asynchronous operation for the Low-Side MOSFET, improving efficiency during light-load or startup conditions.

What protection features are included in the AOZ5332QI?

The device includes Under-Voltage Lockout (UVLO) for the VCC supply and a Thermal Warning (THWN) open-drain output that activates if the junction temperature exceeds 150°C. It also features adaptive dead-time control to prevent shoot-through between the High-Side and Low-Side MOSFETs.

Is the AOZ5332QI compatible with standard PWM controllers?

Yes, it accepts PWM inputs compatible with 3V and 5V CMOS logic levels. It also supports Tri-State PWM inputs, allowing the gate drivers to turn off automatically if the controller enters a high-impedance state.