Texas Instruments

REG1117A

REG1117A Description

The REG1117A is a linear regulator designed for a wide range of power management applications. Manufactured by Texas Instruments, this IC offers an adjustable output voltage ranging from 1.25V to 13.5V, making it highly versatile for various electronic systems. The regulator supports a maximum input voltage of 15V and is capable of delivering up to 1A of output current. With a dropout voltage of 1.55V at 1A, the REG1117A ensures efficient power conversion even at high load conditions. The regulator is housed in a surface-mount SOT223 package, which is ideal for compact designs. Despite being marked as obsolete, the REG1117A remains a reliable choice for applications requiring a positive output configuration and adjustable voltage settings.

REG1117A Features

• Adjustable Output Voltage: The REG1117A provides an adjustable output voltage range from 1.25V to 13.5V, allowing it to meet the specific needs of various electronic circuits.
• High Efficiency: With a maximum dropout voltage of 1.55V at 1A, the regulator ensures minimal power loss and high efficiency, making it suitable for applications where power conservation is critical.
• Protection Features: Over-current and over-temperature protection features safeguard the regulator and connected components from potential damage, enhancing system reliability.
• Low Quiescent Current: The regulator operates with a quiescent current of only 10 mA, minimizing power consumption during standby or low-load conditions.
• High PSRR: A power supply rejection ratio (PSRR) of 62dB at 120Hz ensures that the output voltage remains stable even with varying input conditions, providing clean power to sensitive circuits.
• Compliance and Packaging: The REG1117A is REACH unaffected and RoHS3 compliant, ensuring environmental safety. It is available in a tube package, facilitating easy handling and integration into surface-mount designs.

REG1117A Applications

The REG1117A is ideal for a variety of applications due to its adjustable output voltage, high efficiency, and robust protection features. Some specific use cases include:

• Consumer Electronics: Ideal for powering sensitive circuits in devices such as smartphones, tablets, and portable gaming consoles, where stable and adjustable voltage is crucial.
• Industrial Equipment: Suitable for industrial control systems, sensors, and actuators that require reliable power supply with adjustable voltage settings.
• Telecommunications: Used in base stations and network equipment to provide stable power to critical components, ensuring uninterrupted operation.
• Medical Devices: Applicable in medical equipment such as diagnostic tools and monitoring devices, where precise voltage regulation is essential for accurate performance.

Conclusion of REG1117A

The REG1117A from Texas Instruments is a versatile linear regulator that offers adjustable output voltage, high efficiency, and robust protection features. Despite being marked as obsolete, its technical specifications and performance benefits make it a reliable choice for a wide range of power management applications. The low quiescent current and high PSRR further enhance its suitability for applications requiring stable and efficient power supply. Whether used in consumer electronics, industrial equipment, telecommunications, or medical devices, the REG1117A ensures reliable and precise power regulation.