LM317T-DG

The LM317T-DG is a versatile adjustable voltage regulator manufactured by STMicroelectronics. It is designed to provide a stable output voltage that can be adjusted from 1.25V to 37V, making it suitable for a wide range of applications, including power supplies, battery chargers, and other electronic circuits requiring a regulated voltage.

Key Features:

1. Adjustable Output Voltage: The LM317T-DG allows users to set the output voltage to their desired level using two external resistors. The output voltage can be fine-tuned within the range of 1.25V to 37V, providing flexibility for various applications.

2. Output Current: The device can deliver a maximum output current of 1.5A, making it capable of powering moderate loads without overheating, provided that adequate heat sinking is used.

3. Thermal Protection: The LM317T-DG includes built-in thermal overload protection, which prevents the device from overheating and ensures reliable operation under varying load conditions.

4. Short-Circuit Protection: This regulator features short-circuit protection, which safeguards the device and the connected load in the event of a fault condition.

5. Low Dropout Voltage: The LM317T-DG has a low dropout voltage, typically around 3V at full load, which allows it to maintain regulation even when the input voltage is only slightly above the output voltage.

6. Wide Input Voltage Range: The device can accept input voltages ranging from 3V to 40V, providing versatility in power supply design.

7. Package Type: The LM317T-DG is available in a TO-220 package, which is a common choice for power devices due to its ability to dissipate heat effectively. The package features three pins: input, output, and adjustment.

8. Applications: Common applications for the LM317T-DG include adjustable power supplies, battery management systems, LED drivers, and other circuits requiring a stable and adjustable voltage source.

Electrical Characteristics:

• Input Voltage Range: 3V to 40V
• Output Voltage Range: 1.25V to 37V
• Maximum Output Current: 1.5A
• Dropout Voltage: Typically 3V at full load
• Temperature Range: The device operates effectively over a wide temperature range, typically from -40°C to +125°C.

Conclusion:

The LM317T-DG from STMicroelectronics is a reliable and flexible adjustable voltage regulator that is widely used in various electronic applications. Its combination of adjustable output, thermal and short-circuit protection, and low dropout voltage makes it an excellent choice for designers looking to implement a stable power supply solution.