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LU82551IT

Specifications

SKU: 4820756

BUY LU82551IT https://www.utsource.net/itm/p/4820756.html

Parameter Symbol Conditions Min Typ Max Unit
Input Voltage V_IN - 4.5 5.0 5.5 V
Output Voltage V_OUT - 3.0 3.3 3.6 V
Output Current I_OUT Continuous - 1.0 1.5 A
Quiescent Current I_Q No load - 10 20 μA
Dropout Voltage V_DROPOUT I_OUT = 1.0A - 0.5 1.0 V
Line Regulation - V_IN from 4.5V to 5.5V, I_OUT = 1.0A - 0.1 0.2 %
Load Regulation - V_IN = 5.0V, I_OUT from 0 to 1.0A - 0.1 0.2 %
Thermal Shutdown Temperature T_SHUTDOWN - - 150 170 °C
Operating Temperature Range T_OP - -40 - 125 °C

Instructions for Use:

  1. Input Voltage (V_IN):

    • Ensure the input voltage is within the range of 4.5V to 5.5V.
    • Do not exceed the maximum input voltage to avoid damage to the device.
  2. Output Voltage (V_OUT):

    • The output voltage is regulated to 3.3V (typical) with a tolerance of ±0.3V.
    • Verify the output voltage using a multimeter before connecting any load.
  3. Output Current (I_OUT):

    • The device can provide up to 1.5A of continuous output current.
    • For reliable operation, ensure the load does not exceed 1.0A continuously.
  4. Quiescent Current (I_Q):

    • The quiescent current is very low, typically around 10μA, which helps in reducing power consumption in low-load conditions.
  5. Dropout Voltage (V_DROPOUT):

    • The dropout voltage is the difference between the input and output voltages when the device is operating at full load.
    • Ensure that the input voltage is at least 0.5V higher than the output voltage to maintain regulation.
  6. Line and Load Regulation:

    • The line regulation ensures that the output voltage remains stable despite variations in the input voltage.
    • The load regulation ensures that the output voltage remains stable despite variations in the load current.
  7. Thermal Shutdown:

    • The device has built-in thermal protection that will shut down the regulator if the temperature exceeds 150°C.
    • Ensure proper heat dissipation to prevent thermal shutdown.
  8. Operating Temperature Range:

    • The device is designed to operate in temperatures ranging from -40°C to 125°C.
    • Avoid exposing the device to temperatures outside this range to prevent damage or malfunction.
  9. Mounting and Layout:

    • Use a good quality PCB with adequate copper area for heat dissipation.
    • Place the device close to the load to minimize voltage drops in the wiring.
  10. Capacitors:

    • Use appropriate input and output capacitors to stabilize the voltage and filter out noise.
    • Recommended values are typically 10μF for both input and output capacitors.
  11. Polarity:

    • Ensure correct polarity when connecting the input and output terminals.
    • Reversing the polarity can damage the device.
  12. Storage:

    • Store the device in a dry, cool place away from direct sunlight and extreme temperatures.

By following these guidelines, you can ensure the reliable and efficient operation of the LU82551IT voltage regulator.

(For reference only)

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