FAN1117AS285X

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

The FAN1117AS285X is a fixed positive low dropout linear regulator manufactured by Fairchild Semiconductor. It provides a stable 2.85V output with a maximum continuous current capability of 1A. The device supports an input voltage range up to 18V and maintains a maximum dropout voltage of 1.2V at full load. It operates within a temperature range of 0°C to 125°C and is housed in a SOT-223-4 package.

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

• Fixed 2.85V output voltage for precise power supply requirements
• High current capability of 1A for demanding loads
• Integrated over-current and over-temperature protection features

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

• Portable battery-powered equipment requiring stable voltage regulation
• Post-regulation stages in switching power supplies
• Embedded systems with strict thermal and current constraints

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

Verify the manufacturer marking on the component body to distinguish between original Fairchild, ON Semiconductor, or third-party sources. Confirm the package type matches the required PCB footprint. Request batch traceability documentation to ensure compliance with quality standards. Check for lead-free certification if environmental regulations apply to the final assembly process.

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

Select this component when a fixed 2.85V rail is needed with 1A capacity. Ensure the input voltage does not exceed 18V. Verify that the thermal dissipation capabilities of the SOT-223 package suit the application's ambient temperature and power loss calculations. Consider the 1.2V dropout requirement relative to the minimum input voltage available.

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

This part belongs to the FAN1117A series of low dropout regulators. Other variants in the series include different fixed output voltages such as 1.8V, 2.5V, 3.3V, and 5V. The series shares common architectural features including high ripple rejection and stability with ceramic capacitors.

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

Direct pin-compatible substitutes may include other FAN1117A series parts with different voltage outputs if the circuit allows adjustment. Generic LDOs with similar 1A current ratings and SOT-223 packages can be considered after verifying electrical parameter compatibility.