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LM2591HVT-ADJ

Specifications

SKU: 9934953

BUY LM2591HVT-ADJ https://www.utsource.net/itm/p/9934953.html
IC REG BUCK ADJ 1A TO220-5
Parameter Symbol Conditions Min Typ Max Unit
Input Voltage Range VIN 4.5 60 V
Output Voltage Range VOUT 1.23 60 V
Output Current IOUT 3 A
Efficiency η 90 %
Switching Frequency fSW 150 kHz
Quiescent Current IQ 5 mA
Shutdown Current ISD 50 μA
Thermal Shutdown Temperature TSD 160 °C
Operating Temperature Range TOPR -40 125 °C
Storage Temperature Range TSTG -65 150 °C

Instructions for Using the LM2591HVT-ADJ

  1. Input Voltage (VIN):

    • Ensure the input voltage is within the range of 4.5V to 60V.
    • Use appropriate input capacitors (typically 10μF to 100μF) to stabilize the input voltage.
  2. Output Voltage (VOUT):

    • The output voltage can be adjusted using external resistors R1 and R2.
    • The formula to calculate the output voltage is: ( V_ = 1.23 left(1 + fracright) ).
    • Choose R1 and R2 values to achieve the desired output voltage.
  3. Output Capacitor (COUT):

    • Use a low ESR (Equivalent Series Resistance) capacitor for COUT, typically 10μF to 100μF.
    • This helps to filter out any ripple and noise from the output.
  4. Inductor Selection:

    • Select an inductor with a value between 10μH and 100μH.
    • The inductor should have a saturation current rating higher than the maximum output current.
  5. Feedback Resistor Network:

    • Connect R1 between the ADJ pin and GND.
    • Connect R2 between the ADJ pin and the output (VOUT).
  6. Shutdown Pin (SHDN):

    • To enable the regulator, connect the SHDN pin to VIN or leave it floating.
    • To disable the regulator, connect the SHDN pin to GND.
  7. Thermal Considerations:

    • Ensure proper heat dissipation by mounting the device on a heatsink if operating at high currents or in high ambient temperatures.
    • Monitor the temperature to avoid exceeding the thermal shutdown temperature of 160°C.
  8. Layout Guidelines:

    • Keep the input and output capacitors close to the IC to minimize parasitic inductance.
    • Use wide traces for power paths to reduce resistance and heating.
    • Place the inductor and feedback resistors close to the IC for optimal performance.
  9. Storage and Handling:

    • Store the device in a dry, cool environment within the temperature range of -65°C to 150°C.
    • Handle the device with care to avoid damage from electrostatic discharge (ESD).
(For reference only)

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