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-15V using LM25005

Other Parts Discussed in Thread: LM25005

I used TI's webench design tool to generate -15V fixed output from 18-21V input.

The IC suggested was LM25005. Please see the attached file for design.

On my first test, i was getting -3.55V output. 

on datasheet its mentioned, that pin 1:Vcc = 7V and Vfb = 1.225V

But on testing i did not get the values to be that. Can someone tell me what could be the problem

I have tested this on two seperate prototype and both gave the same result.

7635.TI_Solution1_5V_-15V.pdf