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LM5155EVM-SEPIC: Can LM5155 on LM5155EVM-SEPIC be replaced with LM5156?

Part Number: LM5155EVM-SEPIC
Other Parts Discussed in Thread: LM5155, , LM5156

Hello guys,

One of my customers is evaluating LM5155 using LM5155EVM-SEPIC.

But they knew recently that it is difficult to get LM5155 by their mass-production start dead line and it is easy to get LM5156 by the dead line.

So they want to start LM5156 evaluation using LM5155EVM-SEPIC instead of LM5155.

At this moment, they have the following question. Could you please give me your reply for them?

Q.   Can LM5155 on LM5155EVM-SEPIC be replaced with LM5156? Does LM5156 operate correctly on LM5155EVM-SEPIC?

Your reply would be much appreciated.

Best regards,


  • Hello Kazuya-san, 

    Thanks for reaching out. Yes, the LM5156 can replace the LM5155 on the SEPIC EVM. The difference between the two devices is pin 7: this is AGND in the LM5155 and DITHOFF in the LM5156 and if connected to gnd it enables the spread spectrum. Let me know if further help is needed. 

    Kind regards, 


  • Hello EM,

    Thank you very much for your reply.
    It is very helpful for the customer and me.

    Thank you again and best regards,