FAN1581M25X

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The FAN1581M25X is a linear voltage regulator IC manufactured by Fairchild Semiconductor, part of the FAN1581 series. It provides a fixed positive output voltage of 2.5V with a maximum continuous output current capability of 5A. The device utilizes a TO-252-5 (DPAK) surface-mount package. It operates within an input voltage range of 1.75V to 6.5V and supports junction temperatures up to 125°C.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Ultra-low dropout voltage performance optimized for low voltage applications
• Integrated thermal limiting protection for safe operation under overload conditions
• High accuracy initial output voltage regulation suitable for sensitive logic loads

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• GTL+ bus VTT termination in computer systems
• Low voltage microprocessor power supplies
• Logic IC operation and processor core voltage regulation

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify component authenticity through authorized distribution channels due to potential availability from multiple manufacturers including onsemi and Rochester Electronics. Confirm package marking and datasheet revision match the specific manufacturing lot. Check for RoHS compliance status as regulatory requirements vary by production date and region.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this fixed-output variant when a stable 2.5V rail is required without external feedback resistors. Ensure the input supply voltage remains within the specified 1.75V to 6.5V range to maintain proper regulation. Consider thermal dissipation requirements given the 5A current capability and TO-252-5 package constraints during high-load operations.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

This component belongs to the FAN1581 family of ultra-low dropout linear regulators designed for high-current, low-voltage digital logic applications. The series includes adjustable versions and other fixed voltage options such as 1.2V and 1.5V variants, all sharing similar internal architecture and protection features tailored for modern processor power delivery networks.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

FAN1581MX serves as the adjustable counterpart within the same series. Other fixed voltage variants include FAN1581D12X (1.2V), FAN1581D15X (1.5V), and FAN1581D33X (3.3V). Verify pin compatibility and thermal characteristics before substituting with different output voltages.