FAN2505S285X

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

The FAN2505S285X is a micropower low-dropout (LDO) linear voltage regulator from the FAN2504/05 family, manufactured by onsemi. It provides a fixed output voltage of 2.85V with a maximum continuous output current of 200mA and a peak current capability of 300mA. The device utilizes CMOS technology to achieve an ultra-low ground current of 75µA at full load and features a dropout voltage of 200mV at 200mA. Pin 4 serves as an open-drain Error flag (ERR), indicating when the output voltage drops below 95% of nominal due to faults such as input dropout or thermal overload. The regulator includes thermal limiting protection that shuts down the output if the junction temperature exceeds 150°C.

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

• CMOS-based LDO design offering ultra-low power consumption and minimal shutdown current
• Integrated open-drain error flag output for monitoring fault conditions like undervoltage or overheating
• High loop stability allowing compatibility with a wide range of external capacitor types and ESR values
• Onboard thermal protection circuitry to prevent damage during overload or excessive ambient temperatures

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

• GSM and TDMA cellular handsets
• Portable computers including laptops and notebooks
• Personal Digital Assistants (PDAs)
• Portable cameras and video recorders

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

Verify the specific suffix '285X' confirms the 2.85V fixed output and SOT-23-5 package configuration. Ensure the ERR pin function aligns with system diagnostic requirements. Confirm availability status as older revisions may be obsolete; check for valid replacement part numbers if necessary. Validate that the operating temperature range meets application environmental constraints.

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

Select this component for battery-powered portable applications requiring stable regulation with minimal quiescent current draw. The wide tolerance for output capacitor ESR simplifies bill-of-materials selection. Use the error flag feature for systems needing active fault detection. Ensure input voltage remains within the 6.5V maximum limit and consider thermal resistance characteristics for high-load scenarios.

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

This device belongs to the FAN2504/FAN2505 family of 200mA CMOS LDO regulators originally developed by Fairchild Semiconductor and now managed by onsemi. The family distinguishes between adjustable (FAN2504), bypass-capable fixed (FAN2504-XX), and error-flag fixed (FAN2505-XX) variants. The FAN2505S285X specifically implements the error flag functionality on Pin 4, differentiating it from the standard noise-reduction bypass version.

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

MIC5255-3.0YD5-TR