RC1585M

Overview

The RC1585M is a fixed-output linear voltage regulator manufactured by Fairchild Semiconductor. It provides a nominal output voltage of 1.5 V with a maximum absolute input voltage rating of 7 V. The device supports a maximum output current of 15.5 A and features a typical dropout voltage of 1.15 V. It exhibits a maximum line regulation of 0.003% and a maximum load regulation of 0.0075%. The unit operates within a temperature range of -40 °C to +125 °C, utilizes a single-ended terminal configuration with a pitch of 2.54 mm, and is housed in a plastic epoxy surface-mount package.

Feature Summary

• Ultra-low dropout performance optimized for low voltage applications
• High current capability suitable for processor power supplies
• Fast transient response characteristics
• Integrated thermal limiting protection

Applications

• GTL+ bus VTT termination
• Low voltage microprocessor power supplies
• Embedded processor supply circuits
• Split plane regulator designs

Procurement Notes

Verify the specific suffix against official Fairchild documentation to confirm pinout compatibility and thermal specifications. Confirm RoHS compliance status as datasheets may indicate non-qualified versions. Ensure the operating temperature range meets system requirements before procurement.

Selection Notes

Select this component for applications requiring high current delivery at low voltages with minimal headroom. Verify that the input voltage remains within the 7 V absolute maximum limit. Consider thermal management solutions given the high current capacity and potential power dissipation in compact packages.

Part Context

This part belongs to the FAN158x series of ultra-low dropout linear regulators designed for demanding logic and processor applications. The series includes adjustable and fixed variants optimized for transient response and low input voltage operation in embedded systems.

Replacement Considerations

The FAN1581 series offers similar functionality with 5A current capability. Verify package dimensions and pin assignments before substitution.