FAN1655M

Special Purpose Regulators Overview

The FAN1655M is a low-cost, bi-directional LDO designed for terminating DDR memory buses. It sources and sinks up to 2.1A continuous current with 3A peak capability. The output voltage range is 1.1V to 1.8V. Operating temperature spans 0°C to 125°C. It utilizes surface mount packaging.

Special Purpose Regulators Feature Summary

• Bi-directional regulation for DDR bus termination
• High current sourcing and sinking capability
• Integrated thermal protection

Special Purpose Regulators Applications

• DDR SDRAM memory bus termination
• PC motherboard memory circuits
• Graphics card memory termination

Special Purpose Regulators Procurement Notes

Verify the manufacturer origin, as Fairchild Semiconductor assets are now managed by ON Semiconductor. Confirm the package type matches system requirements. Ensure the operating temperature range meets environmental specifications. Check for specific suffix variations that may indicate tape-and-reel packaging or extended temperature grades. Validate component authenticity through authorized distribution channels.

Special Purpose Regulators Selection Notes

Select this component when a cost-effective solution for DDR bus termination is required. It is suitable for applications needing bidirectional current flow without complex external control loops. Consider the 2.1A continuous rating for standard DDR loads. Evaluate the 0°C to 125°C range against system thermal constraints. Compare against higher-current alternatives if peak loads exceed specifications.

Special Purpose Regulators Part Context

This device belongs to the FAN16xx series of DDR termination regulators from Fairchild Semiconductor. It serves as a specialized power management IC for high-speed digital interfaces. The series includes variants like the FAN6555 for different current requirements. These components simplify PCB layout by integrating power switches and control logic into a single package.

Special Purpose Regulators Replacement Considerations

The FAN6555M is a related part in the same family but offers 2A continuous current. Verify pin compatibility before substitution. Check if the lower current rating of the FAN6555M suffices for the specific application load. Ensure the replacement maintains the required output voltage range and thermal performance.