FAN2515S26X

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

The FAN2515S26X is a fixed-output micropower low-dropout voltage regulator manufactured by onsemi, part of the FAN2514/15 family. It provides a nominal output voltage of 2.6 V with a maximum continuous load current of 200 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 200 mV at full load. Pin 4 serves as an open-drain error flag (ERR) that indicates when the output voltage drops below 95% of the nominal value due to faults such as input dropout or thermal overload. It utilizes a CMOS process 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 on pin 4 to indicate fault conditions where output voltage falls below specified minimums
• Ultra-low power consumption optimized for battery-powered portable devices with fast power-cycle times
• Exceptional loop stability allowing compatibility with a wide variety of external capacitors regardless of ESR values
• Onboard thermal limiting protection that automatically disables the output during overload until the device cools

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 'S26X' confirms the 2.6 V fixed output and SOT-23-5 package configuration. Ensure the source document matches the manufacturer's official datasheet for the FAN2514/15 family to confirm pin assignments and electrical characteristics. Cross-reference ordering codes with the manufacturer's current catalog to ensure availability and compliance with RoHS standards.

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

Select this component when a fixed 2.6 V rail is required in space-constrained portable designs. The ERR pin is essential for systems needing diagnostic feedback on voltage droops caused by brownouts or thermal events. Consider the SOT-23-5 footprint constraints and verify that the application can accommodate the recommended input and output capacitor values for optimal noise rejection and stability.

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

This device belongs to the FAN2514/FAN2515 series of 200 mA CMOS LDO regulators. While the FAN2514 offers adjustable or bypassed outputs, the FAN2515 variant specifically integrates an error flag function on pin 4. This family was designed to replace older BiCMOS designs, offering improved performance in GSM, TDMA, and CDMA cellular applications through lower quiescent current and faster enable times.

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

The FAN2515S26X is pin-compatible with many popular legacy devices. Verify that any substitute maintains the 2.6 V fixed output, 200 mA current rating, and SOT-23-5 package. Ensure the replacement also supports the required error flag functionality if system diagnostics depend on the ERR pin status.

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

What is the function of Pin 4 on the FAN2515S26X?

Pin 4 is an open-drain Error Flag (ERR) output. It goes LOW when the output voltage drops below 95% of the nominal rated voltage due to conditions like input dropout, overheating, or overloading.

How does the FAN2515S26X handle thermal overload?

The device includes onboard thermal protection. If the junction temperature exceeds 150°C, the output shuts down. The output remains disabled until the temperature drops below the limit, at which point it re-enables automatically.

Is the FAN2515S26X sensitive to output capacitor ESR?

No, the FAN2515S26X is nearly insensitive to output capacitor ESR. It maintains stable operation with a wide range of capacitors, including tantalum, aluminum electrolytic, and ceramic types, with ESR values from 10mΩ to 10Ω or more.