RC1584T15

Overview

The RC1584T15 is a fixed positive Low Dropout (LDO) regulator manufactured by Fairchild Semiconductor. It provides a fixed output voltage of 1.5V with a maximum dropout voltage of 1.3V at rated load. The device operates within an input voltage range of 3.5V to 7V and supports a single output channel. It is housed in a TO-263 package with three pins, utilizing bipolar technology for regulation.

Feature Summary

• Provides a stable fixed 1.5V output voltage suitable for low-voltage digital logic applications
• Features a maximum dropout voltage of 1.3V to maintain regulation under varying load conditions
• Utilizes bipolar technology for reliable linear voltage regulation

Applications

• Power supply stages for Intel Pentium II GTL+ bus transceivers
• Voltage regulation for low-voltage microprocessor cores
• General-purpose fixed voltage regulation in consumer electronics

Procurement Notes

Verify the manufacturer origin as Fairchild Semiconductor or its successor onsemi, noting that legacy parts may carry different branding. Confirm the specific suffix '15' indicates the fixed 1.5V output variant rather than the adjustable version. Ensure the package matches the TO-263 specification and check current availability status as older components may be discontinued.

Selection Notes

Select this component when a fixed 1.5V rail is required for legacy processor interfaces like GTL+. Compare against the adjustable RC1584M if variable output is needed. Consider the 1.3V dropout characteristic to ensure sufficient input-output differential. Verify thermal performance requirements for the TO-263 package based on expected load currents.

Part Context

This part belongs to the RC1584 family of LDO regulators designed primarily for powering high-speed logic families such as Intel's GTL+ standard. The family includes both adjustable variants (RC1584M) and fixed voltage versions (e.g., RC1584M15). These regulators were commonly used in computer motherboards and peripheral cards during the late 1990s and early 2000s.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.