FAN2559S18X

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

The FAN2559S18X is a fixed positive linear voltage regulator from the FAN2558/9 series, manufactured by Fairchild Semiconductor. It provides a fixed 1.8V output with a maximum load current of 180mA. The device operates within an input voltage range of 2.7V to 6.5V and features a typical dropout voltage of 250mV at full load. It incorporates thermal shutdown and short-circuit protection, ensuring stable operation with a minimum 1µF low ESR output capacitor.

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

• Provides a fixed 1.8V output with 1% accuracy
• Delivers up to 180mA load current
• Includes power good indicator with open drain output
• Features thermal shutdown and short circuit protection

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

• Processor power-up sequencing
• PDAs and cell phones
• Portable electronic equipment
• PCMCIA Vcc and Vpp regulation

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

Verify the specific suffix 'S' indicates the SOT-23-5 package variant when sourcing. Confirm manufacturer origin as Fairchild Semiconductor or onsemi, noting corporate acquisition history. Ensure the component meets RoHS compliance standards for lead-free manufacturing. Cross-reference datasheet revisions to confirm pinout consistency across production batches.

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

Select this component for applications requiring a compact 1.8V supply rail with moderate current demands. It is suitable for battery-powered devices where low quiescent current and small footprint are critical. Consider the 6.5V maximum input rating for systems with higher supply voltages. Verify that the required output capacitance meets the stability requirements for low ESR capacitors.

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

This part belongs to the FAN2558/9 family of low voltage CMOS LDO regulators. The family offers various fixed output voltages and adjustable options. The FAN2559 designation typically corresponds to specific package configurations within the series, such as the SOT-23-5 form factor, distinguishing it from MLP or other variants.

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

Compatible substitutes include FAN2558S18X and FAN2559MP18X. Verify package compatibility between SOT-23-5 and MLP-6 formats before substitution. Ensure electrical parameters such as output voltage and current capacity match the original design requirements.