RC1587M

Overview

The RC1587M is a low dropout linear regulator manufactured by onsemi, designed for high-current applications. It provides a fixed 3.3 V output with a maximum continuous current capability of 3 A. The device operates within an input voltage range up to 18 V and features a maximum dropout voltage of 1.3 V at full load. It is housed in a D2PAK-3 (TO-263-3) surface-mount package, suitable for efficient thermal management. The unit supports a wide operating temperature range from 0°C to +125°C and includes protection against overcurrent and thermal overload conditions.

Feature Summary

• Optimized for low voltage applications requiring fast transient response
• Integrated thermal shutdown and overcurrent protection circuits
• Designed for stable operation with minimal external components

Applications

• VTT bus termination for Intel Pentium II GTL+ processors
• Power supply stages for Intel Pentium Pro systems
• General purpose low voltage regulation in computing hardware

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels due to potential availability constraints. Confirm RoHS compliance status and specific manufacturing lot codes prior to procurement. Ensure storage conditions meet specified humidity sensitivity levels to maintain device integrity during assembly processes.

Selection Notes

Select this component when a fixed 3.3 V rail is required with significant current demand exceeding standard regulator capabilities. The TO-263-3 package offers superior heat dissipation compared to smaller surface-mount options. Evaluate system input voltage stability to ensure it remains within the specified maximum limit under all operating conditions.

Part Context

This part belongs to the RC1587 family of specialized power management integrated circuits developed for legacy Intel processor architectures. These regulators were engineered to meet the stringent power delivery requirements of early Pentium-based systems, providing reliable voltage conversion with minimal noise interference.

Replacement Considerations

Direct substitutes include the LT1587CT-3.3#PBF from Analog Devices Inc., which maintains pin compatibility and electrical specifications. Verify mechanical footprint alignment and thermal performance characteristics before implementing any alternative component in existing designs.