Texas Instruments

REG1117FA

REG1117FA Description

The REG1117FA is a highly versatile and efficient low-dropout linear regulator (LDO) designed by Texas Instruments, a leading manufacturer in the power management integrated circuit (PMIC) category. This IC regulator offers adjustable output voltage capabilities, making it suitable for a wide range of applications that require precise voltage regulation. With a maximum input voltage of 15V and an output current capacity of 1A, the REG1117FA is ideal for systems that demand high performance and reliability.

REG1117FA Features

• Adjustable Output Voltage: The REG1117FA provides an adjustable output voltage range from 1.25V to 13.5V, allowing for flexibility in various electronic designs.
• Low Dropout Voltage: With a maximum dropout voltage of 1.55V at 1A, the regulator ensures efficient power delivery even when the input voltage is close to the output voltage, minimizing power loss.
• Over Current and Over Temperature Protection: The inclusion of over current and over temperature protection features enhances the reliability and safety of the device, safeguarding it against potential damage.
• High PSRR: The regulator boasts a power supply rejection ratio (PSRR) of 62dB at 120Hz, effectively filtering out noise from the power supply and ensuring a clean output voltage.
• Surface Mount Packaging: The REG1117FA is available in a surface mount package, specifically the DDPAK, which is ideal for compact and high-density PCB designs.
• Moisture Sensitivity Level: With an MSL rating of 2 (1 Year), the device is well-suited for manufacturing environments that require protection against moisture, ensuring long-term reliability.
• Low Quiescent Current: The regulator operates with a low quiescent current of 10 mA, making it suitable for low-power applications where efficiency is critical.

REG1117FA Applications

The REG1117FA is designed to meet the demands of various applications that require precise voltage regulation and high efficiency. Some specific use cases include:

• Power Supply Regulation: Ideal for regulating power supplies in consumer electronics, industrial equipment, and automotive systems.
• Battery-Powered Devices: Suitable for applications where battery life is a critical factor, such as portable electronics and IoT devices.
• Telecommunications: Can be used in base stations, routers, and other telecom equipment where stable power supply is essential.
• Medical Devices: Applicable in medical equipment that requires reliable and precise power regulation, such as diagnostic tools and monitoring devices.

Conclusion of REG1117FA

The REG1117FA from Texas Instruments is a robust and flexible low-dropout linear regulator that offers adjustable output voltage, low dropout voltage, and high PSRR. Its over current and over temperature protection features ensure reliability, while its surface mount packaging and low quiescent current make it suitable for a wide range of applications. Despite being marked as obsolete, the REG1117FA remains a valuable component for engineers and designers seeking a high-performance regulator for their power management needs.