LM431AIM3X

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LM431AIM3X Voltage Reference Power Management IC 2.495 V ~ 37 V SOT-23 marking N1E Adjustable ADJUSTABLE PRECISION ZENER SHUNT REGULATOR

Instructions for Use:

1. Circuit Configuration:

   • The LM431 is typically used as a precision adjustable shunt regulator.
   • Connect the cathode (K) to the reference voltage, the anode (A) to ground, and the reference (R) to the control point.

2. Setting the Output Voltage:

   • The output voltage can be adjusted using two external resistors, R1 and R2, connected between the reference (R) and cathode (K) pins.
   • The formula to calculate the output voltage (Vout) is: [ V_{text} = V_{text} left(1 + fracright) ]
   • Ensure that the cathode current (Ik) is within the specified range to maintain regulation.

3. Thermal Considerations:

   • Ensure adequate heat dissipation if operating at high currents or in high-temperature environments.
   • The maximum junction temperature (Tj) should not exceed 150°C.

4. Stability:

   • To ensure stability, a bypass capacitor (typically 1 μF) should be placed between the cathode (K) and anode (A) pins.
   • For high-frequency applications, a smaller capacitor (e.g., 0.1 μF) may be used.

5. Storage and Handling:

   • Store the device in a dry, cool place.
   • Handle with care to avoid damage to the pins and the device itself.

6. Electrostatic Discharge (ESD) Protection:

   • The device is sensitive to ESD. Use proper grounding and handling techniques to prevent damage.

7. Mounting:

   • Ensure proper mounting on the PCB to avoid mechanical stress on the leads.
   • Follow the recommended soldering profile to prevent thermal damage during assembly.