MAX8551ETI

Overview

The MAX8551ETI is a dual-output DDR power-supply solution integrating a synchronous-buck PWM controller, a sourcing/sinking LDO, and a reference buffer. It generates VDDQ from a 2V to 28V input with up to 15A output current. The LDO provides VTT with continuous sourcing/sinking of 1.5A and peak current of 3A. Both outputs track the REFIN voltage. The device supports fixed or adjustable output voltages ranging from 0.7V to 5.5V. It operates within a temperature range of -40°C to +85°C and is housed in a 28-TQFN (5x5) package.

Feature Summary

• Integrates synchronous buck controller for high-current VDDQ generation
• Includes bidirectional LDO capable of sourcing and sinking VTT current
• Features integrated 10mA reference buffer for VTR generation
• Supports output tracking relative to external reference voltage

Applications

• DDR memory power supply for desktop computers
• Power management for notebook systems
• Voltage regulation for graphic cards

Procurement Notes

Verify component authenticity through authorized Analog Devices channels. Confirm package integrity and pin alignment against the 28-TQFN specification. Review datasheet revisions for any parameter updates. Ensure storage conditions meet moisture sensitivity level requirements prior to assembly.

Selection Notes

Select this component when designing DDR memory interfaces requiring integrated buck and LDO regulation. Evaluate thermal performance given the 15A buck and 1.5A LDO capabilities. Verify input voltage compatibility with the 2V to 28V operating range. Consider board space constraints due to the 28-TQFN footprint.

Part Context

Part of the MAX8550/MAX8551 series designed specifically for DDR power applications. Complements other PMIC solutions by combining multiple regulators into a single IC. Targets high-performance computing environments where space efficiency and power integrity are critical for memory subsystem stability.

Replacement Considerations

MAX8550ETI