FAN1581D25X

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

The FAN1581D25X is a linear voltage regulator IC manufactured by onsemi, formerly Fairchild Semiconductor. It provides a fixed positive output of 2.5V with a maximum continuous current capability of 5A. The device operates within an input voltage range up to 7V and features a maximum dropout voltage of 1.18V at full load. It incorporates internal protection mechanisms including over-current and over-temperature shutdown. The component is housed in a TO-252-5 (DPAK) surface-mount package and is rated for operation across a temperature range of 0°C to 125°C.

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

• Provides stable fixed positive voltage regulation suitable for sensitive digital logic loads
• Integrates comprehensive thermal and current limiting protection for robust system reliability
• Designed for surface-mount assembly to facilitate compact printed circuit board layouts

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

• Power supply stages for microprocessors and field-programmable gate arrays
• Voltage regulation for embedded controller systems
• Biasing circuits for communication interface modules

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

Verify the manufacturer designation carefully as the part may be listed under onsemi following corporate restructuring. Confirm the specific suffix D25X matches the required 2.5V fixed output variant. Check the official datasheet for updated environmental compliance status and moisture sensitivity level classifications prior to procurement planning.

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

Select this component when a high-current 2.5V rail is required from a low-voltage source. Ensure the input voltage remains below the 7V maximum limit to prevent excessive power dissipation. Evaluate thermal management requirements based on the 5A output current and the TO-252-5 package thermal characteristics. Consider alternative packages if higher current density or different pin configurations are needed.

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

This device belongs to the FAN1581 family of high-performance LDO regulators designed for demanding power management applications. The series offers various fixed voltage options and current ratings to support diverse system architectures. The D25X suffix specifically denotes the 2.5V output version packaged in the standard TO-252 form factor commonly used in industrial and consumer electronics.

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

Public confirmed substitute part numbers: FAN1581MX (Adjustable, TO-263), FAN1582D25X (2.5V, 3A, TO-252). Verify pin compatibility and thermal performance before substitution.