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LM431AIM3X

Specifications

SKU: 11291544

BUY LM431AIM3X https://www.utsource.net/itm/p/11291544.html
LM431AIM3X Voltage Reference Power Management IC 2.495 V ~ 37 V SOT-23 marking N1E Adjustable ADJUSTABLE PRECISION ZENER SHUNT REGULATOR
Parameter Symbol Min Typ Max Unit
Operating Voltage Vref 2.50 2.50 2.50 V
Operating Current Iop 0.4 1.0 1.5 mA
Cathode Current Ik 0.1 1.0 15.0 mA
Reference Voltage Vref 2.495 2.500 2.505 V
Temperature Coefficient Tc -10 -3 0 ppm/°C
Output Impedance Zout 0.2 0.25 0.3 Ω
Storage Temperature Tstg -65 - 150 °C
Operating Junction Temp Tj -40 - 150 °C

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.
(For reference only)

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