FAN2501S285X

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

The FAN2501S285X is a fixed-output 2.85V CMOS LDO regulator from the FAN2500/01 family, housed in a SOT-23-5 package. It delivers up to 100mA output current with a maximum dropout voltage of 140mV at full load and 75mV at 50mA. The device features an enable pin for shutdown control, reducing ground current to less than 1µA. Pin 4 serves as an open-drain error flag (ERR) indicating when VOUT drops below 95% of nominal. Electrical characteristics include line regulation of 0.3%/V, load regulation of 2%, and thermal protection shutting down at 150°C.

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

• Utilizes CMOS technology for ultra-low power consumption and low quiescent current.
• Features an open-drain error flag on Pin 4 to signal fault conditions such as input dropout or overheating.
• Provides robust loop stability across a wide range of external capacitor ESR values.
• Includes onboard thermal limiting to protect against overload and excessive junction temperatures.

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

• Cellular phones and accessories
• Portable cameras and video recorders
• Laptop, notebook and palmtop computers

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

Verify that the specific suffix '285' corresponds to the 2.85V fixed output variant within the FAN2501 series. Confirm the ERR pin functionality aligns with system diagnostic requirements. Ensure the ordering information matches the manufacturer's official datasheet specifications for the SOT-23-5 package and tape/reel quantities. Cross-reference part numbers with authorized distributors to ensure authenticity and traceability.

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

Select this component when a fixed 2.85V supply is required alongside fault monitoring capabilities. The FAN2501 series is distinct from the FAN2500 due to its error flag output rather than adjustable or bypass pins. Consider the 100mA current limit and thermal resistance characteristics for heat dissipation planning. This regulator is suitable for battery-powered portable devices requiring efficient power management and compact surface-mount packaging.

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

The FAN2501S285X belongs to the FAN2500/01 family of micropower low-dropout voltage regulators manufactured by onsemi (formerly Fairchild Semiconductor). These devices are designed for cost-effective performance in portable electronics. The family utilizes CMOS process technology to achieve low dropout voltages and high tolerance for various output capacitors, offering improvements over older BiCMOS designs while maintaining pin compatibility with popular legacy devices.

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

The FAN2500S285X is a pin-compatible alternative within the same family but lacks the error flag feature, utilizing a bypass pin instead. Other fixed-voltage variants in the FAN2501 series (e.g., FAN2501S30X, FAN2501S33X) share identical electrical characteristics and package but provide different fixed output voltages. Ensure the replacement maintains the required output voltage and error signaling functionality.