FAN2519S28X

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

The FAN2519S28X is a fixed-output low-dropout linear regulator from the FAN2518/19 family, manufactured by onsemi. It provides a regulated output voltage of 2.8V with a maximum continuous output current of 50mA. The device utilizes CMOS technology and features an enable/shutdown control pin that reduces ground current to less than 1µA when disabled. Pin 4 serves as an open-drain error flag (ERR) indicating if the output voltage drops below 95% of nominal due to faults such as input dropout or thermal overload. The regulator operates within an input voltage range of 2.7V to 6.5V and supports junction temperatures up to 125°C.

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

• CMOS-based design optimized for ultra-low power consumption in portable applications
• Integrated enable/shutdown control allowing rapid power cycling with fast start-up times
• Open-drain error flag output providing diagnostic indication of fault conditions
• Robust protection against thermal overload and short-circuit conditions

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 component authenticity through authorized distribution channels. Confirm package integrity and marking codes match the SOT-23-5 specification. Ensure compatibility with existing PCB footprints and verify that the fixed 2.8V output aligns with system requirements. Check for end-of-life status or obsolescence notices prior to finalizing procurement plans.

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

Select this component for designs requiring a precise 2.8V rail with minimal quiescent current draw. The integrated error flag facilitates system monitoring without external comparators. Consider the SOT-23-5 footprint constraints and ensure adequate copper area for thermal management given the package's thermal resistance characteristics under load.

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

This part belongs to the FAN2518/19 series of micropower LDO regulators designed for battery-powered devices. The FAN2519 variant specifically distinguishes itself from the adjustable FAN2518 by utilizing Pin 4 as an error flag rather than an adjustment or bypass terminal. This family targets cost-effective performance in GSM, TDMA, and CDMA mobile handsets.

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

Microchip Technology MIC5256-3.0YM5-TR is listed as a similar replacement option.