MC33567D-3R2

Overview

The MC33567D-3R2 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 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 for external N-channel MOSFETs
• Supply undervoltage detection

Applications

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

Procurement Notes

Verify the specific suffix R2 indicates tape and reel packaging configuration. Confirm the D-3 variant matches the required 2.3 V and 1.2 V output levels. Check for RoHS compliance status as G-suffix denotes lead-free finish. Ensure compatibility with existing SO-8 footprint designs.

Selection Notes

Select this component when precise regulation of two separate low-voltage planes is required. It is suitable for applications needing independent shutdown controls and short-circuit protection. Consider external MOSFET selection based on thermal and stability requirements defined in the datasheet.

Part Context

This part belongs to the MC33567 family of dual linear FET controllers. Variants include the -1 (1.818 V/1.515 V) and -2 (2.525 V/2.525 V) configurations. The -3 variant specifically targets 2.3 V and 1.2 V supply planes commonly found in computer architectures.

Replacement Considerations

MC33567D-3 is the rail-pack equivalent. MC33567D-3G is the lead-free version.