FAN1117AS18X

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

The FAN1117AS18X is a fixed-output low dropout (LDO) linear regulator manufactured by onsemi. It provides a stable 1.8 V output with a maximum current capability of 1 A. The device operates within an input voltage range of 2.5 V to 17 V and features a maximum dropout voltage of 1.2 V at full load. Key electrical parameters include a line regulation of 0.2 %/V, load regulation of 0.5 %, and a quiescent current of 13 mA. It is housed in a TO-261-4 or TO-261AA surface-mount package and supports an operating temperature range from 0°C to +125°C.

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

• Integrated over-current and over-temperature protection mechanisms for enhanced system reliability
• Low dropout architecture designed to maintain regulation under minimal input-to-output voltage differentials
• Surface-mount construction optimized for automated assembly and compact board layouts

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

• Portable battery-powered equipment requiring efficient voltage regulation
• Consumer electronics utilizing low-noise power supplies
• Embedded systems needing stable 1.8 V logic levels

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

This component is officially classified as obsolete and no longer manufactured by onsemi. Sourcing is restricted to existing distributor inventory or secondary market channels. Verify RoHS compliance status and authenticity through authorized suppliers before procurement. Due to end-of-life status, long-term supply availability cannot be guaranteed. Evaluate alternative components for new designs to ensure production continuity.

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

Select this part only if the specific 1.8 V fixed output and 1 A current rating match the design requirements exactly. Consider the TO-261 package constraints and thermal dissipation capabilities relative to the application's power loss. Verify that the input voltage range remains within the specified 2.5 V to 17 V limits during all operational conditions. Ensure compatibility with existing PCB footprints if replacing legacy designs.

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

The FAN1117A series comprises low dropout three-terminal regulators offering 1 A output current. Variants include fixed outputs such as 1.8 V, 2.5 V, 2.85 V, 3.3 V, and 5 V. The AS18X suffix denotes the 1.8 V fixed version in a surface-mount package. This series belongs to onsemi's portfolio of power management integrated circuits focused on efficiency and protection features.

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

Official substitutes are available via the manufacturer's obsolescence page. Review equivalent LDO regulators with matching 1.8 V output, 1 A capacity, and compatible pinouts. Verify thermal performance and protection feature parity before substitution.