FAN1117AS33X

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

The FAN1117AS33X is a fixed positive low dropout linear regulator manufactured by Fairchild Semiconductor, providing a stable 3.3V output with a maximum current capability of 1A. It operates within an input voltage range of 2.5V to 17V and features a maximum dropout voltage of 1.2V at full load. The device includes internal protection mechanisms for overcurrent and overtemperature conditions, ensuring reliable performance across an operating temperature range of 0°C to +125°C.

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

• Provides a fixed 3.3V output voltage with 1A continuous current capability
• Features low dropout characteristics for efficient power management
• Includes built-in thermal overload and current limit protection

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

• Portable battery-powered equipment requiring stable 3.3V logic levels
• Embedded systems utilizing microcontrollers and memory modules
• Communication devices needing regulated power supplies

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

Verify the manufacturer origin as Fairchild Semiconductor or its successor onsemi, noting that part numbers may carry suffixes like _NL for lead-free compliance. Confirm the package type is TO-252 (DPAK) and ensure the specific output voltage variant matches the 3.3V requirement. Check for RoHS compliance status and verify availability through authorized distributors given potential lifecycle changes in legacy semiconductor lines.

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

Select this component when a fixed 3.3V rail is required with up to 1A load current and minimal external components are desired. Ensure the input voltage remains above 2.5V and consider the 1.2V dropout voltage for headroom calculations. Evaluate thermal dissipation requirements based on the difference between input and output voltages at maximum load to ensure operation within the specified temperature range.

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

This component belongs to the FAN1117A family of low dropout regulators, which includes various fixed output voltage options such as 1.8V, 2.5V, 2.85V, and 5V. The series is designed for applications requiring high efficiency and compact solutions. The AS33X designation specifically indicates the 3.3V fixed output variant in the TO-252 package.

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

Compatible substitutes include other 3.3V, 1A LDO regulators from manufacturers like Texas Instruments or Analog Devices, provided they meet the same electrical specifications and package constraints. Verify pinout compatibility and thermal performance before substitution.