FAN2505S27X

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

The FAN2505S27X 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 200 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. It utilizes CMOS technology for ultra-low power consumption, drawing only 75 µA of ground current. 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

• Ultra-low power consumption utilizing CMOS technology
• Integrated thermal limiting protection against overload conditions
• Enable/Shutdown control for precise power management
• Error flag output indicating voltage drop below specified minimum

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 suffix 'X' indicates tape and reel packaging configuration. Confirm the manufacturer designation as onsemi or Fairchild Semiconductor depending on the production era. Ensure the package type matches SOT-23-5 (SC-74A) requirements for the target PCB footprint. Check RoHS compliance status if environmental regulations apply to the final assembly.

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

Select this component when a fixed 2.7 V rail is required with minimal board space constraints. The SOT-23-5 package suits compact portable designs. Consider the 200 mA current limit for powering RF modules or microcontrollers. The error flag feature is beneficial for systems requiring fault detection during brown-out events.

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

This part belongs to the FAN2504/FAN2505 family of micropower LDO regulators. The FAN2505 variant is distinguished by Pin 4 serving as an Error flag, unlike the adjustable FAN2504 or bypass-capable FAN2504-XX. These devices offer significant improvements over older BiCMOS designs with enhanced loop stability across various capacitor types.

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

MIC5255-3.0YD5-TR

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

What is the function of Pin 4 on the FAN2505S27X?

Pin 4 serves as an open-drain Error flag output. It indicates when the output voltage has dropped below 95% of the nominal rated voltage due to faults such as input dropout, overheating, or overloading.

How does the Enable pin affect power consumption?

Applying a logic low voltage (0.8 V or less) to the Enable pin shuts down the regulator, reducing the supply current to less than 1 µA. A logic high (1.5 V or greater) enables normal operation.