FAN2515S30X

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

The FAN2515S30X is a fixed-output low-dropout voltage regulator from the FAN2514/15 family, manufactured by Fairchild Semiconductor (now ON Semiconductor). It provides a nominal output voltage of 3.0 V with a maximum continuous output 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 an ultra-low dropout voltage of 200 mV at full load. It utilizes CMOS technology to achieve a ground pin current of 75 µA at 200 mA output. Pin 4 serves as an open-drain error flag that indicates when the output voltage drops below 95% of the nominal value due to faults such as thermal shutdown or overload.

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

• Integrated open-drain error flag on Pin 4 for fault detection
• Ultra-low power consumption optimized for portable devices
• Fast start enable time suitable for CDMA time phases
• Onboard thermal limiting protection against overheating

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 manufacturer origin, as Fairchild Semiconductor was acquired by ON Semiconductor. Confirm the specific suffix 'S30X' corresponds to the 3.0 V fixed output version with the ERR pin function. Ensure the package type matches the SOT-23-5 specification required for your PCB footprint. Check RoHS compliance status if environmental regulations apply to your manufacturing process.

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

Select this component when a stable 3.0 V rail is required for battery-powered logic or RF circuits. The FAN2515 variant is specifically chosen over the FAN2514 when system monitoring is needed via the error flag rather than adjustable voltage or noise bypassing. Ensure the application does not exceed the 200 mA continuous current limit to prevent thermal throttling. Verify that the input voltage remains above the minimum operating threshold of 2.7 V under all load conditions.

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

This device belongs to the FAN2514/FAN2515 micropower LDO family designed for GSM, TDMA, and CDMA cellular handsets. While the FAN2514 offers adjustable voltage or bypass options, the FAN2515 series is distinct in its use of Pin 4 as an error diagnostic flag. These regulators are pin-compatible with many popular legacy BiCMOS designs, facilitating direct upgrades in existing portable electronic architectures.

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

FAN2515S30X

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

What is the function of Pin 4 on the FAN2515S30X?

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

How does the FAN2515 differ from the FAN2514?

The primary difference is the function of Pin 4. On the FAN2515, Pin 4 is an Error output flag. On the FAN2514, Pin 4 is either an Adjustable input (ADJ) or a Bypass pin (BYP) depending on the suffix.