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linear reg

Bnovus
Intellectual 490 points
Other Parts Discussed in Thread: LM317, UC2834

I need a linear regulator that I can adjust the voltage and the current limit.  less than 1 amp, about 15  volts out 40 vdc in

  • 0
    TI__Expert 5640 points

    The LM317 is a good choice but the current limit is fixed.  To get both an adjustable voltage and current limit you will need to use a LDO controller to control an external transistor.  The UC2834 LDO Controller has an adjustable voltage and current limit.

  • 0
    Prodigy 30 points

    could you provide some more info?

    what's the maximum ambient operating temperature going to be?

    Why 40V, will you be operating at this continually? 40V is quite high. 40V -15V = 25V x 1A = 25W = a lot of heat. A typical TO-220 part can only handle a couple of watts, so you may need a switcher.

    I thinking of your heat dissipation here....