MPQ4272GVE-0000-AEC1 - pins capacitance

DC-DC Power Converters
1

Hi MPS team,

We are planning to use MPQ4272GVE-0000-AEC1 in our design with a quantity of 7 no’s.
We are planning to connect MPQ4272GVE-0000-AEC1 qty 7 no’s in same I2C bus to control the out put voltage.

We are planning to use I2C communication with frequency of 400Khz

Can you clarify following our queries

  1. We could not find the the I2C pins capacitance in the datasheet of MPQ4272GVE-0000-AEC1.
    Can you provide I2c Pins capacitance

  2. We could see only capacitance for each bus line i.e 400pF from datasheet, is this value we have to consider for calculating bus capacitance?

  3. Since we are connecting qty 7 no’s of MPQ4272GVE-0000-AEC1 in one I2C bus do we need any I2C Buffer to limit the bus capacitance

Thanks & Regards,
Murali Penta.

2

Hi @mpenta,
Unfortunately, we do not have pin capacitance in the DS. However, typically I have it being in the range from 8pF to 15pF for the I2C lines. So 7*15pF = 105pF which should be okay with this device. 400pF is defined as the max capacitance for the I2C standard.

Thank you
Saurabh