FAN1616AD18X

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

The FAN1616AD18X is a low dropout linear voltage regulator manufactured by Fairchild Semiconductor, now part of onsemi. It provides a fixed positive output voltage of 1.8V with a maximum output current capability of 0.5A. The device features a typical dropout voltage of 1V and a maximum of 1.2V at full load. It operates within an input voltage range defined by a minimum differential input-output voltage of 1.5V and a maximum of 5.75V. The regulator includes internal current limiting and thermal shutdown protection. It is housed in a TO-252 (DPAK) package, suitable for surface-mount applications requiring efficient power management.

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

• Fixed 1.8V output voltage optimized for digital logic supplies
• Low dropout characteristic ensures high efficiency under varying load conditions
• Integrated thermal shutdown and current limit protection for robust operation

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

• USB hub power supply regulation
• Motherboard voltage regulation for core logic
• SDRAM module power conditioning

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

Verify the manufacturer designation as Fairchild or onsemi, as corporate acquisitions may affect labeling. Confirm the suffix 'D18' indicates the fixed 1.8V output variant and 'X' denotes tape-and-reel packaging if applicable. Ensure the package type matches the required TO-252 footprint. Check for RoHS compliance markings consistent with the component's production era. Validate authenticity through authorized distribution channels to avoid counterfeit components.

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

Select this component when a stable 1.8V rail is required for low-power digital circuits. The 0.5A current rating suits moderate load applications without excessive heat dissipation. Consider the low dropout performance for battery-powered systems where input voltage may approach the output level. Evaluate thermal requirements based on the expected ambient temperature and PCB copper area for adequate heat spreading.

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

The FAN1616 series comprises adjustable and fixed low dropout regulators designed for USB and motherboard applications. The AD18 variant specifically targets 1.8V logic levels. This family offers ripple rejection and transient response improvements over standard LDOs. The series supports various output voltages including 1.8V, 2.5V, 3.3V, and 5V, catering to diverse system requirements.

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

Compatible substitutes include other 1.8V, 0.5A LDOs in TO-252 packages such as the FAN1616AD18 from the same family. Verify pinout compatibility and thermal resistance characteristics before substitution.