FAN1581D15X

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

The FAN1581D15X is a linear voltage regulator IC manufactured by onsemi, designed for applications requiring stable power delivery. It provides a fixed positive output voltage of 1.5V with a maximum continuous output current capability of 5A. The device utilizes a TO-252-5 surface-mount package, specifically the DPAK form factor with four leads and a tab for thermal management. Key electrical characteristics include a maximum input voltage rating of 7V and a typical quiescent current of 6 mA. The unit incorporates internal protection mechanisms against over-current and over-temperature conditions to ensure operational reliability under varying load and thermal environments.

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

• Provides a fixed positive output voltage suitable for low-voltage digital logic supplies
• Capable of delivering high continuous output current up to 5A for demanding loads
• Integrates comprehensive protection features including over-current and over-temperature shutdown
• Utilizes a surface-mount TO-252-5 package optimized for efficient heat dissipation

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

• Point-of-load regulation in computer motherboards
• Power supply stages for embedded systems
• Voltage regulation for communication equipment
• Biasing circuits for high-current digital components

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

Verify component authenticity through authorized distributors as this part number may be obsolete or subject to lifecycle changes. Confirm exact output voltage tolerance and thermal performance requirements against the official datasheet before integration. Ensure proper handling procedures are followed due to the surface-mount package type. Cross-reference replacement options if availability is limited, noting that pin compatibility does not guarantee identical electrical specifications.

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

Select this component when a fixed 1.5V output is required with high current capacity in a compact footprint. Evaluate thermal resistance capabilities based on expected ambient temperatures and PCB copper area. Consider the input voltage range relative to the source supply to ensure adequate dropout margin. Compare quiescent current consumption against system power budget constraints. Verify package compatibility with existing assembly processes and soldering profiles.

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

The FAN1581 series belongs to onsemi's lineup of high-current LDO regulators designed for robust performance in space-constrained applications. These devices typically feature low noise and high PSRR, making them suitable for sensitive analog and digital circuits. The D15 suffix indicates the specific 1.5V fixed output variant within the family, sharing common pinouts and protection features with other voltage options in the series.

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

Check for direct pin-compatible alternatives from onsemi or other manufacturers offering similar 5A LDO specifications. Verify that substitute parts maintain the same 1.5V output voltage and TO-252-5 package dimensions. Ensure thermal performance and protection thresholds meet or exceed original design requirements.