LM2596-3.3
LM2596-3.3

 

LM2596-3.3

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BUY LM2596-3.3 https://www.utsource.net/itm/p/35198.html
LM2596 SIMPLE SWITCHER Power Converter 150 kHz3A Step-Down Voltage Regulator; Package: TO-263; No of Pins: 5; Qty per Container: 45/Rail

Parameter Symbol Min Typical Max Unit
Input Voltage VIN 4.5 - 40 V
Output Voltage VOUT - 3.3 - V
Output Current IOUT - 3 - A
Quiescent Current IQ - 5 - mA
Dropout Voltage VDROPOUT - 1.2 - V
Efficiency (Typical) η - 90 - %
Operating Temperature TOPR -40 - 85 °C
Storage Temperature TSTG -40 - 125 °C
Load Regulation ΔVOUT/ΔIOUT - 0.1 - mV/A
Line Regulation ΔVOUT/ΔVIN - 0.01 - mV/V
Ripple Rejection RR - 70 - dB
Start-Up Time tSTART - 10 - ms

Instructions for Using LM2596-3.3

  1. Input Voltage:

    • Ensure the input voltage is within the range of 4.5V to 40V. The device will not function properly outside this range.

  2. Output Voltage:

    • The LM2596-3.3 is pre-set to provide a fixed output voltage of 3.3V. No external components are required to set this voltage.

  3. Output Current:

    • The maximum continuous output current is 3A. Ensure that the load does not exceed this limit to avoid overheating or damage.

  4. Quiescent Current:

    • The quiescent current is typically 5mA. This is the current consumed by the regulator when no load is applied.

  5. Dropout Voltage:

    • The dropout voltage is typically 1.2V. This means the input voltage must be at least 1.2V higher than the output voltage for the regulator to maintain regulation.

  6. Efficiency:

    • The typical efficiency is 90%. This indicates that 90% of the input power is converted to output power, with the remaining 10% lost as heat.

  7. Operating Temperature:

    • The operating temperature range is from -40°C to 85°C. Ensure the device operates within this range to avoid performance degradation or failure.

  8. Storage Temperature:

    • The storage temperature range is from -40°C to 125°C. Store the device in this range to prevent damage.

  9. Load Regulation:

    • The load regulation is typically 0.1mV/A. This means the output voltage will change by 0.1mV for every 1A change in load current.

  10. Line Regulation:

    • The line regulation is typically 0.01mV/V. This means the output voltage will change by 0.01mV for every 1V change in input voltage.

  11. Ripple Rejection:

    • The ripple rejection is typically 70dB. This indicates the ability of the regulator to suppress input voltage ripple from appearing at the output.

  12. Start-Up Time:

    • The start-up time is typically 10ms. This is the time it takes for the output voltage to stabilize after the input voltage is applied.

  13. PCB Layout Considerations:

    • Use short, wide traces for the input and output connections to minimize inductance.
    • Place the input and output capacitors close to the regulator to reduce noise and improve stability.
    • Ensure proper heatsinking if the device is expected to dissipate significant power.

  14. Capacitor Selection:

    • Use a 10μF tantalum capacitor on the input side and a 100μF electrolytic capacitor on the output side for stable operation.
    • For better transient response, you can add a 0.1μF ceramic capacitor in parallel with the output capacitor.

  15. Thermal Management:

    • If the device is expected to operate near its maximum output current, ensure adequate heatsinking to keep the junction temperature within safe limits.

By following these instructions, you can ensure reliable and efficient operation of the LM2596-3.3 voltage regulator.

(For reference only)

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