FAN2515S25X

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

The FAN2515S25X is a fixed-output micropower low-dropout (LDO) voltage regulator from the FAN2514/15 family, manufactured by onsemi. It provides a stable 2.5V output with a maximum continuous current of 200 mA and a peak 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 200 mV at full load. 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 thermal shutdown or overload. It utilizes CMOS technology for ultra-low power consumption and includes thermal limiting protection.

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

• Integrated open-drain error flag output indicates fault conditions where output voltage falls below specified minimums
• Optimized for fast power-cycle times suitable for CDMA time phases in cellular applications
• CMOS-based design ensures extremely low ground current and high tolerance for various external capacitor ESR values

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

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

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

Verify that the specific part number corresponds to the SOT-23-5 package configuration. Confirm the pin 4 function is ERR rather than ADJ or BYP. Check datasheet revisions for any updates to absolute maximum ratings or thermal characteristics. Ensure compatibility with required output capacitor types given the wide ESR stability range.

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

Select this component when a fixed 2.5V rail is required with diagnostic feedback capabilities. The ERR pin allows system monitoring for undervoltage events caused by input dropout or thermal stress. Consider the 200 mA continuous limit and thermal resistance constraints for PCB layout. This device is suitable for battery-powered portable electronics requiring low quiescent current and robust loop stability.

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

The FAN2515S25X belongs to the FAN2514/FAN2515 series of 200 mA CMOS LDO regulators. While the FAN2514 offers adjustable or bypass options, the FAN2515 variant specifically integrates an error flag on pin 4 for fault detection. Both families share identical electrical performance regarding dropout voltage, ground current, and thermal protection mechanisms.

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

Pin-compatible alternatives within the same family include other fixed-voltage variants like FAN2515S33X for different voltage rails. Adjustable versions such as FAN2514SX may replace it if external resistor dividers are acceptable and error flagging is not required.