LT1945 +5V -20V

Discussion in 'General Electronics Chat' started by uXe, Jun 29, 2015.

  1. uXe

    Thread Starter New Member

    Feb 4, 2015
    4
    0
    Was hoping for some help adapting this circuit from +12V / -20V to +5V / -20V.

    Are the two resistors on the +12V side the only components that will need to change?

    [​IMG]
     
  2. Bordodynov

    Active Member

    May 20, 2015
    637
    188
    Replace 1 MOhm resistor to a smaller resistor. Approximately 330 - 360 kohms. Use the LTspice.
     
    uXe likes this.
  3. uXe

    Thread Starter New Member

    Feb 4, 2015
    4
    0
    Tried that, and instead of a steady output voltage I end up with this sawtooth wave:

    [​IMG]
     
  4. dl324

    Distinguished Member

    Mar 30, 2015
    3,235
    619
    Try larger filtering caps and/or larger inductor.
     
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