FAN1117AT33

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

The FAN1117AT33 is a fixed positive linear voltage regulator manufactured by Fairchild Semiconductor, now part of onsemi. It provides a stable 3.3 V output with a maximum load current capability of 1 A. The device operates within an input voltage range from a minimum of 2.5 V to a maximum of 17 V. Key electrical specifications include a maximum dropout voltage of 1.2 V at full load, a quiescent current of 13 mA, and an input bias current of 4 mA. Line regulation is specified at 0.2 %/V, while load regulation is 0.5 %. The component supports a power dissipation of up to 18 W and functions reliably across an operating temperature range from 0 °C to +125 °C.

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

• Provides a fixed 3.3 V positive output voltage for power management applications
• Capable of delivering up to 1 A continuous load current
• Features low dropout characteristics for efficient voltage regulation
• Includes thermal protection mechanisms for safe operation

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

• Power supplies for embedded systems requiring 3.3 V rails
• Battery-powered equipment utilizing linear regulation
• General-purpose power management in consumer electronics

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

Verify the manufacturer source carefully, as Fairchild Semiconductor has been acquired by onsemi. Confirm that the component matches the specific TO-220-3 through-hole package variant intended for your design. Check for RoHS compliance status and ensure the datasheet corresponds to the original Fairchild documentation or the official onsemi equivalent to guarantee parameter accuracy.

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

Select this component when a fixed 3.3 V output is required with high current capacity in a through-hole package. Consider the 17 V maximum input limit and 18 W power dissipation rating for thermal management. Compare against surface-mount alternatives like the DPAK version if board space is constrained, noting that package selection impacts thermal performance and mounting requirements.

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

This component belongs to the FAN1117 series of low-dropout linear regulators. The 'T' suffix indicates the TO-220-3 through-hole package, distinguishing it from surface-mount variants such as the DPAK (D2PAK) packages used in other models within the same family. The series is designed for general-purpose voltage regulation tasks.

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

Public confirmed substitute part numbers include NCV1117DT33T5G and LD1117ADT33TR. Verify pinout compatibility and thermal characteristics when substituting, as package types may differ between through-hole and surface-mount options.