MP2166 Synchronization Questions

DC-DC Power Converters
1

Hi MPS Support,

We are evaluating the MP2166 for a dual-output design with 5 V nominal / 5.5 V maximum input, with outputs of 0.75 V at 1.1 A and 1.2 V at 0.4 A.

Could you please clarify:

  1. What is the maximum guaranteed minimum on-time over process and temperature?

  2. For the 5.5 V to 0.75 V rail, what is the maximum switching/synchronization frequency you would recommend?

  3. Can the SYNC input follow a spread-spectrum clock whose frequency is continuously modulated? If so, are there any important limits on the frequency range or modulation?

We are considering approximately 1–2 MHz operation.

Thanks,

2

Hi Dan,

Thank you for posting on the MPS Technical Forum.

  1. Min on-time is 55ns
  2. For 5V5 down to 0.75V, I would suggest not going above 2.4MHz. 1-2MHz is perfect.
  3. You will have to manually implement this on the SYNC pin. I would suggest choosing a switching frequency and going +/-50kHz for stability reasons.

Thanks,

Allison