MC33567D-3R2G

Overview

The MC33567D-3R2G is a dual linear power supply controller designed for high-current voltage regulation in motherboard applications. It provides drive, sense, and control signals to interface with two external N-channel MOSFETs for regulating two independent supply planes. The device features undervoltage short circuit detection and supply undervoltage detection. Output 1 regulates at 2.3 V and Output 2 at 1.2 V. It operates within a supply voltage range of 9.0 V to 12.5 V DC and supports an operating ambient temperature from 0°C to 80°C.

Feature Summary

• Dual independent regulated supplies for distinct voltage planes
• Undervoltage short circuit protection with hiccup mode recovery
• Drive capability specifically optimized for external N-channel MOSFETs
• Supply undervoltage detection for system reliability

Applications

• Motherboard power management
• Dual power supply systems
• High current voltage regulation

Procurement Notes

Verify the suffix R2 indicates tape and reel packaging configuration. Confirm the G suffix denotes lead-free finish compliance. Ensure the specific voltage outputs (2.3 V and 1.2 V) match the application requirements before procurement.

Selection Notes

Select this component when dual independent linear regulation is required for motherboard planes. It is suitable for applications needing 2.3 V and 1.2 V outputs. External N-channel MOSFETs must be selected based on thermal and stability guidelines provided in the datasheet.

Part Context

This part belongs to the MC33567 family of dual linear controllers. Variants include MC33567D-1G for GTL/AGP/I/O voltages and MC33567D-2G for clock/memory voltages. The D-3 variant specifically targets 2.3 V and 1.2 V generation.

Replacement Considerations

MC33567D-3G is the tube-packaged equivalent with identical electrical characteristics.