FAN2500S27X

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

The FAN2500S27X is a fixed-output low-dropout linear regulator from the FAN2500/01 family, manufactured by onsemi. It provides a regulated 2.7 V output with a maximum continuous current of 100 mA. The device operates within an input voltage range of 2.7 V to 6.5 V and features a dropout voltage of 100 mV at full load. It utilizes CMOS technology for ultra-low power consumption, drawing only 25 µA ground current during operation. The component includes thermal limiting protection and an enable/shutdown control pin that reduces quiescent current to less than 1 µA when disabled.

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

• Utilizes CMOS technology to achieve ultra-low power consumption and minimal ground current during active operation.
• Features an enable/shutdown control pin that allows users to disable the output and reduce supply current to less than 1 µA.
• Incorporates onboard thermal limiting protection that automatically shuts down the output if die temperature exceeds specified limits.
• Designed with exceptional loop stability that accommodates a wide variety of external capacitors without sensitivity to ESR.

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 specific part number suffix against official manufacturer documentation to confirm the fixed output voltage and pin configuration. Ensure compatibility with the required SOT-23-5 surface-mount package footprint. Confirm that the application design accounts for the thermal resistance characteristics of the PCB layout to prevent thermal shutdown under maximum load conditions.

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

Select this component for battery-powered portable devices requiring a stable 2.7 V rail with minimal quiescent current draw. The wide tolerance for external capacitor ESR simplifies bill-of-materials selection and reduces design complexity. Consider the thermal performance requirements of the final enclosure, as the compact SOT-23-5 package relies heavily on PCB copper area for heat dissipation during high-load operations.

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

This device belongs to the FAN2500/01 family of micropower LDO regulators designed for cost-effective performance in GSM and TDMA cellular handsets and portable computers. The FAN2500 variant distinguishes itself through its Pin 4 configuration, which serves as a bypass connection for noise reduction in fixed-voltage models like the FAN2500S27X.

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

The datasheet notes that the FAN2500/01 family is pin-compatible with many popular older BiCMOS designs. Engineers replacing legacy components should verify that the replacement supports the required input voltage range and thermal characteristics of the original circuit.