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Soft-Start

Category: Datasheet/Specs
Product Number: LTM4623
Hello,
Sheet 13 of the datasheets (Rev D) for LTM4623 show Soft-Start Time as Tss = 0.6 * (Css / 2uA). However, LTSpice simulation of this LTM4623 seems to show that the Internal Current Source is 2.5uA instead of 2uA.
1. Can you tell me if the Internal Current Source for LTM4623 is 2uA or 2.5uA? Is the datasheets correct or the LTSpice simulation model correct? Please note that the LTM4624 has a 2.5uA internal Current Source.
2. For the Soft-Start Equation Tss = 0.6 * (Css / 2uA), is Css in unit of Farad and Tss in unit of Second?
Thank you.

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