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LM34936-Q1: Schematic check

Part Number: LM34936-Q1
Other Parts Discussed in Thread: LM34936


I'd like to seek your help to check the schematic for LM34936-Q1

My requirements:

  • Vin: 9V to 18V
  • Vout: 12V
  • Iout: 3.5A maximum

Could you advise?



  • Hi Eng Lih Khaw,

    Thanks you for reaching out with your question and for using the LM34936  in your design.

    Here are my comments regarding the schematic.

    1. SLOPE capacitor (C12)

    I suggest decreasing this resistor to 180pF. This will increase the slope compensation helping to improve the loop stability.

    2. If ISNS(-) and ISNS(+) are not being used please connect these to ground.

    3. Add 0 Ohm gate resistors on the all of the power MOSFETs (Q1, Q2, Q3 and Q4) This will help change the slew rate of the switch node. This can help when it comes time to perform EMI testing.

    Please let me know if you have any questions