LM317T ORIGINAL GOODS IN STOCK TO-220

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Instructions for Using the LM317T:

1. Circuit Configuration:

   • Connect the input voltage (VIN) to the "IN" pin.
   • Connect the output voltage (VOUT) to the "OUT" pin.
   • Connect the adjustment pin (ADJ) to a voltage divider formed by two resistors (R1 and R2).

2. Output Voltage Calculation:

   • The output voltage can be adjusted using the formula: [ V_ = 1.25 left(1 + fracright) + I_ cdot R2 ]
   • For most applications, ( I_ ) is very small (approximately 50 渭A) and can often be neglected.

3. Capacitors:

   • Place a 0.1 渭F ceramic capacitor between the input and ground to filter out noise.
   • Optionally, place a 1 渭F tantalum capacitor between the output and ground to improve transient response and stability.

4. Heat Dissipation:

   • Ensure proper heat sinking if the device will be operating at high power levels. The thermal resistance (胃JA) should be considered to maintain the junction temperature within safe limits.

5. Protection:

   • Consider adding a fuse in series with the input to protect against overcurrent conditions.
   • Use a diode (e.g., 1N4007) in parallel with the output to prevent reverse voltage from damaging the regulator during input short circuits.

6. Mounting:

   • Mount the LM317T on a heatsink if necessary, ensuring good thermal contact.
   • Use thermal grease or a thermal pad to enhance heat transfer.

7. Testing:

   • Before finalizing the design, test the circuit under various load and input voltage conditions to ensure stable operation and correct output voltage.

8. Storage:

   • Store the LM317T in a dry environment and handle with care to avoid static damage.