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FAN2512S25X

FAN2512S25X Description

The FAN2512S25X is a linear voltage regulator designed by Fairchild Semiconductor (now part of ON Semiconductor) for applications requiring a fixed output voltage of 2.5V and a maximum output current of 150mA. This regulator is housed in a compact SOT23-5 package, making it suitable for surface mount applications. It features a low quiescent current of 50 µA and a high power supply rejection ratio (PSRR) of 43dB at 120Hz, ensuring minimal noise and excellent stability in the output voltage. The regulator is designed to operate with an input voltage range up to 6.5V and offers a low dropout voltage of 0.18V at 150mA, making it efficient even under low input-to-output voltage differentials.

FAN2512S25X Features

• Low Quiescent Current: The FAN2512S25X boasts a low quiescent current of 50 µA, which is crucial for applications where power consumption must be minimized, such as in battery-powered devices.
• High PSRR: With a PSRR of 43dB at 120Hz, this regulator effectively filters out noise from the power supply, ensuring a clean and stable output voltage.
• Fixed Output Voltage: The regulator provides a fixed output voltage of 2.5V, eliminating the need for external resistors to set the output voltage, simplifying the design process.
• Low Dropout Voltage: The maximum dropout voltage of 0.18V at 150mA ensures high efficiency, especially when the input voltage is close to the output voltage.
• Enable Control Feature: The regulator includes an enable control feature, allowing the user to turn the regulator on and off, which can be useful for power management in complex systems.
• Over-Temperature Protection: The built-in over-temperature protection ensures the device's reliability and longevity by preventing damage due to excessive heat.
• Surface Mount Packaging: The SOT23-5 package is ideal for surface mount applications, providing a compact and reliable solution for space-constrained designs.

FAN2512S25X Applications

The FAN2512S25X is well-suited for a variety of applications where a stable and efficient power supply is required. Some specific use cases include:

• Battery-Powered Devices: The low quiescent current and high PSRR make this regulator ideal for portable electronics, such as smartphones, tablets, and other battery-operated devices, where power efficiency and noise reduction are critical.
• Embedded Systems: In embedded systems where space is limited, the compact SOT23-5 package and fixed output voltage simplify the design and reduce the footprint on the PCB.
• Consumer Electronics: The regulator's performance benefits make it suitable for consumer electronics that require a stable power supply with minimal noise, such as audio equipment and smart home devices.
• Industrial Applications: The over-temperature protection and enable control feature make the FAN2512S25X a reliable choice for industrial applications where robustness and power management are essential.

Conclusion of FAN2512S25X

The FAN2512S25X is a versatile and efficient linear voltage regulator that offers several unique features and advantages over similar models. Its low quiescent current, high PSRR, and low dropout voltage make it an excellent choice for applications where power efficiency and noise reduction are critical. The enable control feature and over-temperature protection further enhance its reliability and flexibility. While the product is now obsolete, it remains a valuable component for existing designs and can still be found in bulk packaging for those who require its specific performance characteristics.