MAX8550ETI

Overview

The MAX8550ETI is an integrated DDR power supply solution combining a synchronous buck PWM controller, an LDO linear regulator, and a reference buffer. The buck stage drives external N-channel MOSFETs to generate outputs from 2V to 28V input down to 0.7V at up to 15A. The LDO provides VTT/VTTR tracking with ±3A source/sink capability. It features Quick-PWM architecture for high efficiency and fast transient response.

Feature Summary

• Integrates synchronous buck controller and LDO for complete DDR power sequencing
• Quick-PWM architecture ensures high efficiency and rapid load transient response
• LDO outputs track half the reference voltage with high accuracy
• Supports full ceramic output capacitor designs to reduce component count

Applications

• Desktop computer motherboard power systems
• Notebook computer power management
• Graphics card voltage regulation modules

Procurement Notes

Verify the specific suffix (e.g., +T for tape and reel) against your manufacturing requirements. Confirm the package type matches your PCB footprint design. Ensure the manufacturer designation aligns with current Analog Devices or Maxim Integrated sourcing channels. Check for RoHS compliance markings on the datasheet.

Selection Notes

Select this component when a combined buck and LDO solution is required for DDR memory interfaces. It is suitable for applications needing precise VTT tracking of VREFIN/2. Consider the thermal performance of the TQFN package relative to your system's heat dissipation capabilities and the maximum current demands of the memory bus.

Part Context

This part belongs to the MAX8550/MAX8551 family of integrated DDR power solutions. These ICs are designed to simplify power board layouts by integrating multiple regulators into a single package. They replace discrete controller and LDO combinations, reducing the overall bill of materials and assembly complexity for memory subsystems.

Replacement Considerations

Check for MAX8551 variants which may offer similar functionality with potential pinout or feature differences. Verify compatibility with existing control signals and voltage references before substitution. Consult official cross-reference guides for confirmed equivalent parts.