FAN1581M12X

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

The FAN1581M12X is a fixed-output ultra-low dropout linear regulator manufactured by Fairchild Semiconductor. It provides a stable 1.2V output with a maximum current capability of 5A. The device operates within an input voltage range of 1.75V to 6.5V and features a typical dropout voltage of 0.4V at full load. It is housed in a TO-252-5 surface-mount package, designed for efficient power management in low-voltage digital applications.

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

• Fixed 1.2V output optimized for GTL termination
• Ultra-low dropout performance for minimal power loss
• Integrated thermal limiting protection

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

• GTL bus VTT termination
• Low voltage logic supply
• Embedded processor supplies

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

Verify the specific suffix 'M12X' against official Fairchild or onsemi documentation to confirm the fixed 1.2V output configuration and TO-252-5 packaging. Ensure compatibility with existing board layouts and thermal requirements before procurement.

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

Select this component when a precise 1.2V rail is required for high-current loads up to 5A. It is suitable for designs prioritizing low dropout voltage and fast transient response over adjustable output flexibility.

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

This part belongs to the FAN1581 family of ultra-low dropout regulators. While other variants offer adjustable outputs or different fixed voltages (such as 1.5V or 2.5V), the M12X variant is specifically engineered for applications requiring a dedicated 1.2V supply, such as CPU bus termination.

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

Compatible substitutes include the FAN1581D12X and FAN1581MX. Verify pinout compatibility and thermal characteristics when replacing.