FAN1117AT

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

The FAN1117AT is a low dropout three-terminal linear regulator manufactured by Fairchild Semiconductor, now part of onsemi. It provides a fixed positive output voltage of 3.3 V with a maximum continuous output current capability of 1 A. The device operates within an input voltage range from 2.5 V to 17 V and maintains a maximum dropout voltage of 1.2 V at full load. It features a line regulation of 0.2 %/V and load regulation of 0.5 %. The component is housed in a TO-220-3 through-hole package and supports an operating temperature range from 0°C to +125°C.

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

• Provides stable regulated power with high current delivery capability for demanding loads
• Incorporates internal protection mechanisms against over-current conditions and thermal overload
• Designed for efficient voltage conversion with minimal energy loss across the pass element

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

• Power supply sections in embedded computing systems requiring 3.3 V rails
• Battery-powered devices needing efficient step-down regulation
• Industrial control modules utilizing through-hole mounting for robustness

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

Verify manufacturer lineage as Fairchild Semiconductor assets were acquired by onsemi. Confirm RoHS compliance status via official documentation. Check for obsolescence notices or lifecycle changes. Ensure the TO-220-3 package matches board layout requirements. Validate authenticity through authorized distribution channels.

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

Select this component when a fixed 3.3 V output is required with up to 1 A capacity. The TO-220-3 package suits applications needing through-hole assembly and enhanced thermal dissipation. Consider the 17 V maximum input rating for higher voltage source environments. Evaluate thermal management needs given the 18 W power dissipation potential.

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

This regulator belongs to the FAN1117A family of low dropout linear regulators. Variants include adjustable versions and other fixed voltages such as 1.8 V, 2.5 V, and 5 V. The series shares common electrical characteristics including 1 A output current and similar protection features, differing primarily in output voltage settings and available packages like DPAK or SOT-223.

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

Direct substitutes include FAN1117AD33X (DPAK package) and FAN1117AS33X (SOT-223 package). These alternatives offer identical electrical performance but differ in physical footprint and mounting style. Verify pinout compatibility and thermal resistance specifications before substitution.