LTC3863

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Berzin

Joined Dec 17, 2020
59
Hi guys actually I am trying something new
I required your help in this systematic of this ic LTC3863 which produce the output of -5 volts so what to change in this systematic in order to get -12 volts
The positive current is coming from IC 555 to transistor to a 12 volt relay which act as a input for the LTC3863 the output is going to get connected to a machine and I can't change the terminal of power or directly attach the positive and ground as I want get it out of the box way and not by any common way
The machine uses 12 volts dc power
 

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crutschow

Joined Mar 14, 2008
27,188
From the data sheet (they are so informative) below:
From that you can calculate the value of RFB1, RFB2, and CFB2 to get -12V.

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