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LT8364 frequency compensation and soft start

Question asked by EVC on Aug 10, 2018
Latest reply on Aug 13, 2018 by dulcevida

I want to design a power supply with the following specs:

Vin: 11-13V (12V nominal)

Vout: -7.5V

Iout: 1A

 

I have followed the data sheet and calculated the key components and I am doing some simulations with LTSpice to get acquainted with it and to have an idea of the expected behavior of the power supply. Please see attachment below.

 

One difficulty I am having is the data sheet does not provide much infomation about how to calculate the compensation network. I noticed some instability when there is a current step on the output. Is there a way to improve this?

 

Regarding the soft-start, how is it calculated?

 

Thanks in advance.

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