FAN2502S285X

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

The FAN2502S285X is a micropower low-dropout voltage regulator manufactured by onsemi, utilizing CMOS technology. It provides a fixed output voltage of 2.85V with a maximum load current of 150 mA and a peak current capability of 300 mA. The device operates within an input voltage range of 2.7 V to 6.5 V and features a dropout voltage of 150 mV at full load. It incorporates thermal limiting protection and an enable/shutdown control pin that reduces ground current to less than 1 µA during shutdown. The component is housed in a compact SOT-23-5 surface-mount package.

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

• Utilizes CMOS technology for ultra-low power consumption and low quiescent current.
• Features extremely low dropout voltage characteristics suitable for battery-powered applications.
• Includes onboard thermal limiting protection to prevent damage during overload conditions.
• Offers flexible loop stability compatible with a wide variety of external capacitors.

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

• Cellular phones and accessories
• Personal Digital Assistants (PDAs)
• Portable cameras and video recorders
• Laptop, notebook, and palmtop computers

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

Verify the specific suffix 'S285X' confirms the 2.85V fixed output configuration. Ensure the ordering code includes the 'SX' designation for tape and reel packaging if required for automated assembly. Confirm the manufacturer origin as Fairchild Semiconductor or onsemi, noting historical corporate transitions. Validate RoHS compliance status against the latest datasheet revision before procurement.

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

Select this component when a stable 2.85V rail is required for portable electronics with strict space constraints. The SOT-23-5 package minimizes board area usage compared to larger regulators. Consider the wide capacitor tolerance requirements which simplify bill-of-materials selection. Evaluate thermal dissipation capabilities based on the expected ambient temperature and PCB copper layout for optimal performance.

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

This device belongs to the FAN2502/FAN2503 family of 150 mA CMOS LDO regulators originally developed by Fairchild Semiconductor. The family distinguishes models by Pin 4 functionality: ADJ for adjustable versions, BYP for noise reduction in fixed versions, and ERR for fault flagging. The FAN2502S285X specifically utilizes the BYP function for optimized noise performance in fixed-voltage applications.

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

The datasheet notes that the FAN2502/03 family is pin-compatible with many popular older BiCMOS designs. Verify pin assignments and electrical specifications against legacy components before substitution. No direct equivalent part numbers are explicitly listed in the provided documentation.