FAN1117AS25X

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

The FAN1117AS25X is a fixed positive low dropout linear regulator manufactured by Fairchild Semiconductor, now part of onsemi. It provides a fixed output voltage of 2.5V with a maximum continuous output current capability of 1A. The device operates within an input voltage range from 2.5V to 17V and features a maximum dropout voltage of 1.2V at full load. It incorporates internal protection mechanisms including overcurrent limiting and thermal shutdown to ensure reliability under fault conditions.

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

• Fixed 2.5V output voltage regulation
• 1A high-current output capability
• Integrated overcurrent and thermal protection

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

• Power management in portable electronic devices
• Biasing circuits for RF modules
• Post-regulation for switching power supplies

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

Verify the manufacturer designation as Fairchild Semiconductor or onsemi, as corporate acquisitions have affected branding. Confirm the SOT-223-4 package type matches your PCB footprint requirements. Ensure the datasheet version corresponds to the specific production lot for accurate electrical parameter validation before integration into final designs.

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

Select this component when a stable 2.5V rail is required with up to 1A load current. The wide input voltage range allows flexibility in system design. Consider the thermal performance in the SOT-223 package for heat dissipation needs. Verify that the fixed output voltage meets the target circuit requirements without needing external adjustment resistors.

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

This component belongs to the FAN1117A series of low dropout regulators. Other variants in the family include different fixed output voltages such as 1.8V, 2.85V, 3.3V, and 5V. The series shares common architectural features but differs in output specifications. This specific model targets applications requiring precise 2.5V regulation.

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

Direct substitutes may include other FAN1117A series parts with compatible pinouts if voltage adjustments are acceptable. Cross-reference with equivalent LDO regulators offering similar current ratings and dropout characteristics. Verify pin compatibility and thermal performance before substituting.