Texas Instruments

REG103GA-3.3G4

REG103GA-3.3G4 Description

The REG103GA-3.3G4 is a fixed output linear voltage regulator designed by Texas Instruments. This regulator is engineered to deliver a stable 3.3V output voltage with a maximum output current of 500mA. It features a low dropout voltage of 0.28V at 500mA, ensuring efficient operation even when the input voltage is close to the output voltage. The regulator is housed in a compact SOT22-36 package, making it suitable for surface mount applications. With a maximum input voltage of 15V, the REG103GA-3.3G4 can accommodate a wide range of input sources while maintaining a low quiescent current of 0.7mA. This device also includes an enable control feature and robust protection mechanisms such as over-current and over-temperature protection, enhancing its reliability and versatility.

REG103GA-3.3G4 Features

• Fixed Output Voltage: Provides a stable 3.3V output, ideal for applications requiring a consistent power supply.
• Low Dropout Voltage: With a maximum dropout voltage of 0.28V at 500mA, the regulator maintains high efficiency even under low input-to-output voltage differentials.
• High PSRR: A power supply rejection ratio (PSRR) of 65dB at 120Hz ensures minimal noise and ripple in the output voltage, contributing to superior performance in sensitive applications.
• Enable Control Feature: Allows for dynamic control of the regulator's operation, enabling power savings and flexibility in system design.
• Protection Features: Over-current and over-temperature protection mechanisms safeguard the device and connected circuits from damage under adverse conditions.
• Low Quiescent Current: A quiescent current of 0.7mA minimizes power consumption, making the regulator suitable for battery-powered and energy-efficient applications.
• Compliance and Reliability: The REG103GA-3.3G4 is REACH unaffected and RoHS3 compliant, ensuring environmental sustainability and regulatory adherence. It also has a moisture sensitivity level (MSL) of 1, indicating unlimited exposure to moisture without degradation.

REG103GA-3.3G4 Applications

The REG103GA-3.3G4 is well-suited for a variety of applications where a stable and efficient power supply is crucial. Its low dropout voltage and high PSRR make it ideal for use in portable devices, consumer electronics, and industrial control systems. Specific use cases include:

• Portable Devices: Ideal for powering smartphones, tablets, and other handheld devices where battery life and efficiency are paramount.
• Consumer Electronics: Suitable for powering home appliances, gaming consoles, and audio/video equipment where stable voltage and low noise are essential.
• Industrial Control Systems: Can be used in PLCs, sensors, and actuators where reliable power supply and protection features are required.
• Medical Devices: Applicable in medical equipment where precise voltage regulation and low noise are critical for accurate performance.

Conclusion of REG103GA-3.3G4

The REG103GA-3.3G4 from Texas Instruments stands out as a reliable and efficient linear voltage regulator. Its combination of a fixed 3.3V output, low dropout voltage, high PSRR, and low quiescent current makes it an excellent choice for a wide range of applications. The inclusion of enable control and robust protection features further enhances its versatility and reliability. Whether used in portable devices, consumer electronics, or industrial systems, the REG103GA-3.3G4 delivers consistent performance and energy efficiency, making it a preferred solution for modern electronic designs.