AOZ5038QI-05

Overview

The AOZ5038QI is a high-efficiency synchronous buck power stage module from Alpha & Omega Semiconductor Inc. It integrates two asymmetrical MOSFETs and an integrated driver within a compact 5mm x 5mm QFN-31L package. The module supports a continuous output current of 50A with peak currents up to 60A. It operates with a power supply range of 4.5V to 25V and a driver supply range of 4.5V to 5.5V, enabling switching frequencies up to 2MHz.

Feature Summary

• Asymmetrical MOSFET configuration optimized for low duty cycle operation and minimal conduction loss
• Integrated bootstrap Schottky diode and high-current gate driver for fast switching
• Single FCCM pin control supporting shutdown, diode emulation, and CCM modes
• Tri-state PWM input compatibility for accurate controller interfacing

Applications

• Servers
• Notebook computers
• VRMs for motherboards
• Point of load DC/DC converters
• Memory and graphic cards

Procurement Notes

Verify the specific suffix against official documentation, as ordering codes may indicate variations in packaging or environmental compliance. Confirm that the component meets RoHS standards if required by your design specifications. Ensure the supplier provides valid traceability data for quality assurance purposes during the acquisition process.

Selection Notes

Select this module for applications requiring high efficiency at low duty cycles due to the optimized high-side MOSFET characteristics. Consider the thermal resistance values when designing heat dissipation strategies. Verify that the external controller logic aligns with the specified voltage thresholds for reliable PWM and FCCM signal interpretation.

Part Context

This component belongs to the DrMOS power module family designed for synchronous buck conversion. It is intended to replace discrete MOSFET and driver solutions by integrating necessary components into a single package. The design aims to minimize parasitic inductance and EMI signatures through optimized pinout and layout considerations.

Replacement Considerations

The AOZ5038QI is functionally compatible with Intel DrMOS specification IMVP8 (VRM13) in form fit and function. Designers should verify pinout compatibility and electrical parameters when substituting with other modules claiming similar standard adherence.

FAQ

How does the FCCM pin affect the operation of the low-side MOSFET?

When the FCCM pin is held low, the low-side MOSFET enters diode emulation mode, allowing asynchronous operation. A high impedance state on this pin will shut down both MOSFETs.

What is the purpose of the GL pin on the module?

The GL pin is brought out for diagnostic and manufacturing test purposes only. It is not directly connected to the internal gate pad, so it should not be connected in application circuits.

How is shoot-through protection implemented in this module?

An adaptive timing circuit monitors the falling edge of the gate voltage and ensures dead time between switches. This prevents cross-conduction across the input bus even under transient conditions.