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LM3429MHX/NOPB

Specifications

SKU: 11686085

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Parameter Symbol Conditions Min Typ Max Unit
Input Voltage VIN Continuous 4.5 - 60 V
Output Current IOUT Continuous - 1.2 2.5 A
Switching Frequency fSW - 200 700 1800 kHz
Efficiency η VIN = 12V, IOUT = 1A - 92 - %
Shutdown Current ISD VIN = 12V - 1 - μA
Thermal Shutdown Temperature TSD - - 160 - °C
Operating Junction Temperature TJ - -40 - 125 °C
Storage Temperature TSTG - -65 - 150 °C

Instructions for Use:

  1. Input Voltage (VIN):

    • Ensure the input voltage is within the range of 4.5V to 60V.
    • Use appropriate input capacitors to stabilize the input voltage.
  2. Output Current (IOUT):

    • The maximum continuous output current is 2.5A. Design the circuit to handle this current with adequate heat dissipation.
    • Use an appropriate inductor and output capacitor to maintain stable output.
  3. Switching Frequency (fSW):

    • The switching frequency can be set between 200kHz and 1800kHz using an external resistor.
    • Higher frequencies reduce the size of the inductor but increase switching losses.
  4. Efficiency (η):

    • The typical efficiency at 12V input and 1A output is 92%. Optimize the design for high efficiency by selecting low-loss components.
  5. Shutdown Current (ISD):

    • The shutdown current is typically 1μA at 12V input. Use the shutdown pin to control the operation of the device.
  6. Thermal Shutdown Temperature (TSD):

    • The device will automatically shut down if the junction temperature exceeds 160°C. Ensure proper thermal management to prevent overheating.
  7. Operating Junction Temperature (TJ):

    • The operating junction temperature range is from -40°C to 125°C. Design the PCB and heatsink to keep the temperature within this range.
  8. Storage Temperature (TSTG):

    • Store the device in an environment where the temperature ranges from -65°C to 150°C.

Additional Notes:

  • Always refer to the datasheet for detailed specifications and application notes.
  • Ensure all connections are secure and free from short circuits.
  • Use appropriate PCB layout techniques to minimize noise and parasitic effects.
(For reference only)

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