Part Number: TPS54231
One of my customers is evaluating TPS54231 on their own PCB for their new products. They want to increase Css (softstart capacitor) to over 27nF to avoid TPS54231 input voltage dropping. But the device datasheet says "The slow-start time should be set between 1 ms to 10 ms to ensure good startup behavior. The value of the slow-start capacitor should not exceed 27 nF." on page 11.
Can a capacitor over 27nF be used for Css placed between SS and GND terminal? For example, can 33nF, 47nF or 100nF(0.1uF) be used as Css? If over 27nF capacitor is not good to use, what kind of problem will be happened?
Your reply would be appreciated.
There is no issue for larger Css.
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In reply to Shawn Nie:
In reply to Kazuya Nakai54:
This is an old device, I don't know the history, but we have tried larger Css, there is no issue.
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