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REG103FA-3

REG103FA-3 Description

The REG103FA-3 is a linear voltage regulator designed by Burr-Brown, a division of Texas Instruments, and falls under the category of Power Management Integrated Circuits (PMIC). This regulator is specifically engineered to provide a stable and reliable 3V output voltage with a maximum output current of 500mA. The device is housed in a surface-mount DDPAK/TO263 package, making it suitable for compact and high-density PCB designs.

Key technical specifications of the REG103FA-3 include a maximum input voltage of 15V, a quiescent current of 0.7 mA, and a dropout voltage of 0.28V at 500mA. These attributes make it highly efficient, particularly in applications where input voltage may vary significantly. The regulator also features a Power Supply Rejection Ratio (PSRR) of 65dB at 120Hz, ensuring minimal noise and ripple on the output voltage.

REG103FA-3 Features

The REG103FA-3 offers several unique features that set it apart from similar models in the market. One of its standout attributes is the low dropout voltage of 0.28V at 500mA, which allows it to maintain regulation even when the input voltage is close to the output voltage. This is particularly beneficial in battery-powered applications where the input voltage may drop as the battery discharges.

The regulator also includes an enable control feature, providing users with the flexibility to turn the regulator on and off as needed. This feature can be used to conserve power during periods of inactivity, further enhancing the efficiency of the system.

In addition to its efficiency and flexibility, the REG103FA-3 is equipped with robust protection features. It includes over-current and over-temperature protection, ensuring safe operation and preventing damage to the regulator and connected components under adverse conditions.

REG103FA-3 Applications

The REG103FA-3 is ideal for a wide range of applications where a stable 3V supply is required. Its low dropout voltage and high efficiency make it particularly suitable for portable and battery-powered devices, such as smartphones, tablets, and other handheld electronics. The regulator's ability to handle a maximum input voltage of 15V also makes it a good fit for automotive applications, where the input voltage can vary significantly due to the use of lead-acid batteries and alternators.

The surface-mount package of the REG103FA-3 allows for easy integration into modern PCB designs, making it a versatile choice for both consumer electronics and industrial applications. Its fixed output voltage configuration simplifies design and ensures consistent performance across different devices.

Conclusion of REG103FA-3

In summary, the REG103FA-3 is a high-performance linear voltage regulator that offers a combination of efficiency, flexibility, and robust protection features. Its low dropout voltage and enable control feature make it an excellent choice for battery-powered and portable applications, while its surface-mount package ensures ease of integration into modern PCB designs.

Despite being marked as obsolete, the REG103FA-3 remains a reliable and efficient solution for applications requiring a stable 3V supply. Its unique features and performance benefits make it a valuable component in the power management portfolio of Burr-Brown and Texas Instruments.