FAN2504S25X

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

The FAN2504S25X is a fixed-output 2.5V CMOS LDO regulator in a SOT-23-5 package. It delivers up to 200mA output current with a maximum dropout voltage of 200mV at full load. The device features ultra-low power consumption, drawing only 75µA ground current during operation and less than 1µA in shutdown mode via the Enable pin. Pin 4 serves as a Bypass input for noise reduction. It includes thermal limiting protection that disables the output if junction temperature exceeds 150°C.

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

• Utilizes CMOS technology for low quiescent current and high efficiency
• Provides an onboard bypass pin to minimize output noise
• Features thermal shutdown protection against overheating
• Supports external enable control for deep power-down modes

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

• Cellular phones and accessories
• Portable cameras and video recorders
• Laptop, notebook and palmtop computers
• PDAs

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

Verify the specific suffix '25X' confirms the 2.5V fixed output voltage and tape-and-reel packaging format. Confirm the manufacturer origin, as Fairchild Semiconductor products are now managed by onsemi. Ensure the component matches the original datasheet specifications regarding the SOT-23-5 footprint and electrical characteristics before finalizing procurement.

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

Select this component when a stable 2.5V rail is required for portable electronics. It is suitable for designs needing low noise performance via the bypass pin and strict power management through the enable feature. Consider the thermal resistance of the PCB layout, as the SOT-23-5 package relies heavily on copper area for heat dissipation under heavy loads.

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

This part belongs to the FAN2504/05 family of micropower low-dropout regulators. While the base FAN2504 allows adjustable output voltages, the FAN2504S25X variant fixes the output at 2.5V and provides a bypass function on Pin 4. This distinguishes it from the FAN2505 series, which utilizes Pin 4 for error flagging.

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

The datasheet notes the device is pin-compatible with many popular older BiCMOS designs. Verify compatibility with legacy parts using similar pinouts and voltage ratings.