FAN1117AD285X

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

The FAN1117AD285X is a low dropout three-terminal linear regulator manufactured by Fairchild Semiconductor. It provides a fixed positive output voltage of 2.85V with a maximum output current capability of 1A. The device supports an input voltage range up to 18V and exhibits a maximum dropout voltage of 1.2V at full load. It features a typical load regulation of 0.05% and includes on-chip thermal limiting and trimmed current limit protection for enhanced reliability.

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

• Provides stable fixed positive output voltage regulation
• Capable of delivering high output current up to 1A
• Incorporates internal thermal limiting protection
• Features trimmed current limit for safety

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

• Battery-powered systems requiring efficient voltage regulation
• Portable electronics with limited power supply headroom
• Post-regulation stages in switching power supplies
• Embedded systems needing clean DC voltage rails

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

Verify the manufacturer origin, as this component was originally produced by Fairchild Semiconductor before its semiconductor business acquisition. Confirm the package type matches your PCB footprint requirements, typically TO-252 or DPAK. Ensure the fixed output voltage specification aligns precisely with your circuit design needs. Check for RoHS compliance status if required by your manufacturing standards. Validate that the supplier provides genuine parts to avoid counterfeit risks associated with legacy components.

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

Select this regulator when a fixed 2.85V output is required with high current capacity. Consider the 1.2V dropout voltage constraint to ensure sufficient input-output differential under all operating conditions. Evaluate thermal management requirements based on the power dissipation calculated from the voltage drop and load current. Compare against adjustable LDO options if flexibility in output voltage is needed instead of a fixed value.

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

This component belongs to the FAN1117A series of low dropout regulators. The series includes various fixed output voltage variants such as 1.8V, 2.5V, 3.3V, and 5V. These devices are designed for applications requiring simple, cost-effective linear regulation with good line and load regulation characteristics. The AD suffix typically denotes specific packaging and temperature grade configurations within the product family.

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

Direct substitutes include other FAN1117A series variants with different fixed output voltages if the voltage level can be adjusted in the design. Cross-brand equivalents should match the 1A output current, 18V max input, and similar dropout characteristics. Verify pinout compatibility and thermal performance before substitution.