FAN2501S27X

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

The FAN2501S27X is a fixed-output low-dropout linear voltage regulator manufactured by onsemi. It provides a nominal output voltage of 2.7 V with a maximum continuous output current of 100 mA. The device operates within an input voltage range of 2.7 V to 6.5 V and utilizes a compact SOT-23-5 surface-mount package. Key electrical characteristics include a ground pin current of 25 µA at full load, a dropout voltage of 100 mV at 100 mA, and thermal shutdown protection triggered at 150°C. The component supports an operating junction temperature range from -40°C to +125°C.

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

• Integrated error flag output on Pin 4 that indicates when the regulated output voltage drops below 95% of its nominal value due to fault conditions such as input dropout or overload.
• CMOS-based design optimized for ultra-low power consumption in battery-operated portable devices.
• Robust loop stability maintained across a wide range of external capacitor ESR values without requiring specific ceramic or tantalum types.
• Onboard thermal limiting circuitry automatically disables the output if die temperature exceeds safe limits.

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 the part number against official manufacturer documentation to confirm the specific suffix 'S27X' corresponds to the 2.7 V fixed output variant. Ensure compatibility with the SOT-23-5 footprint and validate that the application environment remains within the specified -40°C to +125°C operating temperature range. Confirm that the required 100 mA load current does not exceed the device's thermal dissipation capabilities given the PCB layout constraints.

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

Select this component for designs requiring a stable 2.7 V rail with minimal quiescent current draw. The inclusion of an error flag makes it suitable for systems needing diagnostic monitoring of power integrity. Consider the SOT-23-5 package size for space-constrained layouts. Ensure the input voltage source can maintain a differential above the dropout threshold under all load conditions to prevent unintended regulation loss.

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

This device belongs to the FAN2500/FAN2501 family of micropower LDO regulators utilizing CMOS technology. While the FAN2500 series offers adjustable or bypass configurations, the FAN2501 series specifically features an error flag output for fault detection. These regulators are designed to replace older BiCMOS designs, offering improved performance and pin compatibility for portable electronics applications.

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

FAN2501S27X