LM1117T-3.3

LM1117T-3.3

Category: IC Chips

Specifications
SKU
12536037
Details

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Parameter Symbol Conditions Min Typ Max Unit
Input Voltage VIN 3.9 15 V
Output Voltage VOUT Fixed 3.3 V
Output Current IOUT Continuous 800 mA
Dropout Voltage VD IOUT = 100 mA, VIN = 3.9 V 1.2 V
Quiescent Current IQ VIN = 3.9 V, IOUT = 0 mA 5 mA
Load Regulation ΔVOUT IOUT: 0 mA to 800 mA 4 mV
Line Regulation ΔVOUT VIN: 3.9 V to 15 V 15 mV
Power Dissipation PD Tj = 125°C, θJA = 63°C/W 1.2 W
Operating Temperature TOPR -40 125 °C
Storage Temperature TSTG -65 150 °C

Instructions for Using the LM1117T-3.3:

  1. Input Voltage (VIN):

    • Ensure the input voltage is within the range of 3.9 V to 15 V.
    • The input voltage must be at least 1.2 V higher than the output voltage to maintain regulation.
  2. Output Voltage (VOUT):

    • The LM1117T-3.3 provides a fixed output voltage of 3.3 V.
    • No external resistors are required for setting the output voltage.
  3. Output Current (IOUT):

    • The maximum continuous output current is 800 mA.
    • Ensure that the load does not exceed this limit to avoid overheating or damage.
  4. Dropout Voltage (VD):

    • The dropout voltage is the minimum difference between the input and output voltages required to maintain regulation.
    • For IOUT = 100 mA, the typical dropout voltage is 1.2 V.
  5. Quiescent Current (IQ):

    • The quiescent current is the current drawn by the regulator when no load is connected.
    • At VIN = 3.9 V and IOUT = 0 mA, the typical quiescent current is 5 mA.
  6. Load Regulation (ΔVOUT):

    • The change in output voltage due to changes in load current.
    • For IOUT ranging from 0 mA to 800 mA, the typical load regulation is 4 mV.
  7. Line Regulation (ΔVOUT):

    • The change in output voltage due to changes in input voltage.
    • For VIN ranging from 3.9 V to 15 V, the typical line regulation is 15 mV.
  8. Power Dissipation (PD):

    • The power dissipation is the product of the voltage drop across the regulator and the output current.
    • Ensure that the power dissipation does not exceed 1.2 W to avoid overheating.
  9. Operating Temperature (TOPR):

    • The operating temperature range is from -40°C to 125°C.
    • Ensure that the ambient temperature and thermal design allow the device to operate within this range.
  10. Storage Temperature (TSTG):

    • The storage temperature range is from -65°C to 150°C.
    • Store the device in a dry environment to prevent moisture damage.

Additional Notes:

  • Use appropriate heat sinking if the power dissipation is high or the ambient temperature is elevated.
  • Place input and output capacitors close to the regulator to ensure stability and reduce noise.
  • For best performance, use a 1 μF ceramic capacitor on the input and a 10 μF tantalum capacitor on the output.
(For reference only)

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