Design request using LM25118

Grant Wang84

Other Parts Discussed in Thread: LM25118

My customer need to use LM25118 to convert from Vin=9V-12.6V to Vout=5V/12V/20V/3A (output selectable). I can't get the correct simulation results using Webench. But I do know this design request is really make sense, right?

I have hoped to get design parameters through Webench. But it failed. Is there any suggestions on this design request? Is it the only way to design it by equations in datasheet?

over 9 years ago

0 Vijay86929 over 9 years ago

TI__Genius 11490 points

HI Grant,
I have directed your question to the right person.
There is also an excel sheet on the LM25118 webpage to help with the design.

0 Garrett Roecker over 9 years ago

TI__Mastermind 21720 points

Hi Grant,

I was able to get the simulation to work in Webench using the following inputs. These should be you're worst case condition given the design spec.
VINmin = 9V
VINmax = 12V
VOUT = 20V
IOUT = 3A
Ambient Temp = 30C

What error are you having? Sometimes lowering the ambient temperature can help make the simulation converge.

-Garrett

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Design request using LM25118