The LM317G-TN3-R is an adjustable 3-terminal positive voltage regulator manufactured by Unisonic Technologies Co., Ltd (UTC). It's designed to supply a stable and adjustable output voltage ranging from 1.2V to 37V. This versatile regulator is widely used in power supplies, battery chargers, and other voltage regulation applications.

Applications

• Adjustable Power Supplies: Used to create adjustable voltage power supplies for laboratory equipment, prototyping, and general electronics projects.
• Battery Chargers: Employed in battery charging circuits to provide constant-current or constant-voltage charging.
• Voltage Regulators: Used as a general-purpose voltage regulator in various electronic systems.
• Current Limiters: Configured as a current limiter to protect circuits from overcurrent conditions.
• Linear Regulators: Serves as a linear regulator in applications requiring a stable and adjustable output voltage.

Features

• Adjustable Output Voltage: Provides an adjustable output voltage ranging from 1.2V to 37V, offering flexibility in various applications.
• Output Current of 1.5A: Capable of delivering up to 1.5A of output current, suitable for a wide range of loads.
• Internal Thermal Overload Protection: Includes built-in thermal overload protection to prevent damage from excessive heat.
• Short-Circuit Protection: Features short-circuit protection to protect the regulator and the connected load from damage.
• Output Transistor Safe-Area Compensation: Provides output transistor safe-area compensation to ensure stable and reliable operation.

Benefits

• Versatility: Adjustable output voltage provides flexibility to meet various application requirements.
• Reliability: Internal protection features enhance the reliability of the regulator and the connected circuits.
• Easy to Use: Simple design and easy integration into various electronic systems.
• Wide Input Voltage Range: Operates over a wide range of input voltages, providing stable output even with fluctuating input.
• Cost-Effective: Provides a cost-effective solution for voltage regulation and power supply applications.

Additional Details

The LM317G-TN3-R requires external resistors to set the output voltage. The output voltage can be calculated using the formula Vout = 1.25V * (1 + R2/R1), where R1 and R2 are the external resistors. Proper heat sinking is necessary to dissipate heat when operating at high output currents. The device is available in a TO-220 package and complies with RoHS standards, ensuring environmental compliance. Its robust design and protection features make it a reliable choice for various voltage regulation needs.