Fremont Micro Devices

FT531CA

FT531CA Description

The FT531CA is a linear voltage regulator designed by Fremont Micro Devices Ltd, offering a fixed output voltage of 1.5V and a maximum output current of 250mA. This regulator is housed in a compact SOT23-5 package, making it suitable for surface mount applications. Despite its small size, the FT531CA delivers robust performance with a maximum input voltage of 6V and a dropout voltage of only 0.3V at 100mA. It features low quiescent current (36 µA) and excellent power supply rejection ratio (PSRR) ranging from 72dB to 60dB across frequencies from 1kHz to 10kHz. The regulator also includes an enable control feature and over-current protection, ensuring reliable operation in various electronic systems.

FT531CA Features

• Fixed Output Voltage: The FT531CA provides a stable 1.5V output, ideal for applications requiring precise voltage regulation.
• High Efficiency: With a dropout voltage of 0.3V at 100mA, the regulator maintains high efficiency even under varying load conditions.
• Low Quiescent Current: The 36 µA quiescent current ensures minimal power consumption, making it suitable for battery-operated devices.
• Enable Control: The enable feature allows for dynamic control of the regulator, enabling power-saving modes and efficient power management.
• Over-Current Protection: Built-in over-current protection safeguards the regulator and connected circuits from damage due to excessive current.
• Excellent PSRR: The regulator offers a PSRR of 72dB to 60dB across a frequency range of 1kHz to 10kHz, ensuring clean power delivery and reduced noise.
• Compact Packaging: The SOT23-5 package is ideal for space-constrained designs, allowing for integration into small form factor devices.
• Surface Mount Compatibility: The surface mount design facilitates automated assembly processes, enhancing manufacturing efficiency.

FT531CA Applications

The FT531CA is well-suited for a variety of applications where a stable and efficient power supply is required. Its low dropout voltage and high PSRR make it ideal for:

• Battery-Powered Devices: The low quiescent current and efficient power delivery ensure extended battery life.
• Consumer Electronics: The compact size and surface mount compatibility make it suitable for devices such as smartphones, tablets, and portable audio equipment.
• Medical Devices: The stable output voltage and over-current protection ensure reliable operation in critical medical equipment.
• Industrial Control Systems: The robust performance and enable control feature make it suitable for industrial applications requiring precise power management.

Conclusion of FT531CA

The FT531CA is a versatile linear voltage regulator that offers a combination of high efficiency, low quiescent current, and excellent PSRR. Its compact SOT23-5 package and surface mount compatibility make it suitable for a wide range of applications, from battery-operated devices to industrial control systems. The enable control feature and over-current protection further enhance its reliability and flexibility. Although the product is marked as obsolete, its unique features and performance benefits make it a valuable component for engineers and designers seeking a reliable and efficient power solution.