LMR23630: What is the time unit of delta Iout in equation 6 on page 23?

Kazuya Nakai59

Guru 21645 points

Part Number: LMR23630
Other Parts Discussed in Thread: LMR33630

Hello guys,

One of my customers is going to use LMR33630 for their new products.

They want to calculate Cout capacitance using equation 6 on 23 in the device datasheet(SNVSAN3D).

But they couldn't find the time unit of delta Iout.

Their question is the follow.

Q. What is the time unit of delta Iout in equation 6 on page 23?

For example, is it xxA/us? Or xxA/ms?

Your reply would be much appreciated.

Best regards,

Kazuya.

0 Andy Chen over 6 years ago

Hi Kazuya,

I think you mean equation 16, NOT equation 6.

Unit of Delta Iout is Ampere, it doesn't mean the di/dt here.

0 Kazuya Nakai59 over 6 years ago in reply to Andy Chen

Guru 21645 points

Hello Andy,

Thank you very much for the prompt reply.

I'm sorry I wrote a wrong part number. I wanted to ask about LMR33630.

Q. What is the time unit of delta Iout in equation 6 on page 23 in LMR33630 datasheet(SNVSAN3D).

Doesn't it mean the di/dt here too?

Thank you again and best regards,

Kazuya.

0 Andy Chen over 6 years ago in reply to Kazuya Nakai59

Hi Kazuya,

Equation 6 is derivered from basic equation C=Q/V, the unit of delta Iout is Ampere, it is load current step or change, but not the di/dt.

0 Kazuya Nakai59 over 6 years ago in reply to Andy Chen

Guru 21645 points

Hello Andy,

Thank you very much for your reply!

Best regards,

Kazuya.

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