Texas Instruments

REG104FA-3

REG104FA-3 Description

The REG104FA-3 is a fixed-output linear low dropout regulator (LDO) designed by Texas Instruments, a leading manufacturer in the power management integrated circuit (PMIC) category. This IC offers a stable 3V output at a maximum current of 1A, making it suitable for a wide range of applications requiring precise voltage regulation. The device features a maximum input voltage of 15V and a dropout voltage of only 0.48V at 1A, ensuring efficient operation even under varying input conditions. With a quiescent current of 0.7 mA and a supply current of 1.8 mA, the REG104FA-3 is optimized for low-power applications. It also includes enable control and protection features such as over-current and over-temperature protection, enhancing its reliability and versatility. The device is packaged in a surface-mount DDPAK-5 format, making it suitable for compact and high-density PCB designs. Although the REG104FA-3 is now obsolete, it remains a reliable choice for legacy systems and specific applications where its unique features are advantageous.

REG104FA-3 Features

• Fixed Output Voltage: The REG104FA-3 provides a stable 3V output, ensuring consistent power supply to connected devices.
• Low Dropout Voltage: With a maximum dropout voltage of 0.48V at 1A, the regulator maintains efficiency even when the input voltage is close to the output voltage.
• Low Quiescent Current: The 0.7 mA quiescent current and 1.8 mA supply current make this regulator ideal for applications where power consumption must be minimized.
• Enable Control: The enable feature allows for dynamic control of the regulator's operation, providing flexibility in power management.
• Protection Features: Over-current and over-temperature protection ensure the device's longevity and reliability, safeguarding against potential damage.
• Surface-Mount Packaging: The DDPAK-5 package format is designed for surface-mount technology, facilitating integration into compact and high-density PCB designs.
• High PSRR: A power supply rejection ratio (PSRR) of 65dB at 120Hz ensures that the regulator can effectively filter out noise from the input power supply, maintaining a clean output voltage.

REG104FA-3 Applications

The REG104FA-3 is well-suited for a variety of applications where precise voltage regulation and low power consumption are critical. Some specific use cases include:

• Consumer Electronics: Ideal for portable devices such as smartphones, tablets, and digital cameras where battery life and power efficiency are paramount.
• Industrial Equipment: Suitable for low-power industrial sensors and control systems that require stable voltage regulation.
• Telecommunications: Can be used in base stations and other telecom equipment where reliable power supply and low noise are essential.
• Medical Devices: Applicable in medical instruments where precise voltage regulation and low power consumption are necessary for accurate operation.
• Automotive Electronics: Useful in automotive systems where compact size and high reliability are required.

Conclusion of REG104FA-3

The REG104FA-3 from Texas Instruments is a robust and efficient linear low dropout regulator designed for applications requiring precise voltage regulation and low power consumption. Its low dropout voltage, low quiescent current, and enable control features make it a versatile choice for a wide range of electronic systems. Despite being obsolete, the REG104FA-3 remains a reliable option for legacy systems and specific applications where its unique features and performance benefits are advantageous.