FAN1581MX

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

The FAN1581MX is an ultra-low dropout linear regulator manufactured by Fairchild Semiconductor, now part of onsemi. It provides a 5A output current with an adjustable positive voltage range from 1.237V to 5.7V. The device features a maximum dropout voltage of 0.6V and operates within an input voltage range of 1.75V to 6.5V. It is housed in a TO-263-5 (D2PAK) surface-mount package with five terminals. The component supports a maximum junction temperature of 125°C and includes internal protection against over-current and thermal overload.

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

• Ultra-low dropout performance optimized for low voltage applications
• Adjustable output voltage capability across a wide range
• Integrated thermal limiting and over-current protection

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

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

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

Verify the manufacturer status as the original Fairchild Semiconductor has been integrated into onsemi. Confirm that the specific suffix MX corresponds to the TO-263-5 plastic package variant. Check for RoHS compliance markers such as JESD-609 code e3. Ensure the component meets the required moisture sensitivity level for your assembly process. Validate that the part number matches the exact electrical specifications needed for your design.

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

Select this regulator when high current delivery up to 5A is required with minimal voltage drop. It is suitable for systems needing precise voltage adjustment between 1.237V and 5.7V. Consider its thermal management capabilities given the 125°C maximum junction temperature rating. Evaluate the TO-263-5 package for adequate heat dissipation in your PCB layout. Ensure the input supply voltage stays within the 1.75V to 6.5V operational window.

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

The FAN1581 series includes fixed voltage variants like the FAN1581-1.2 and FAN1581-1.5 for specific logic families. The MX suffix denotes the D2PAK/TO-263 package form factor. This component belongs to the broader family of ultra-low dropout regulators designed for demanding digital loads. It shares architectural similarities with the 3A FAN1582 but offers higher current capacity.

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

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