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ADP2387: Variability of Current Limit inside IC

Hello,

I have received the inquiry from customer.

Customer needs the variability of current limit inside ADP2387.

I checked the datasheet.

According to the datasheet, the variability of current limit is changed by Rilim.

For example,

Resistor(Ilim) Min(Ilim) Typ(Ilim) Max(Ilim) Min Rate(Ilim) Max Rate(Ilim)
44.2k ohm 7.7A 9.2A 10.7A -19.48% 14.02%
66.5k ohm 5.1A 6.1A 7.1A -19.61% 14.08%
133k ohm 2.3A 2.9A 3.5A -26.09% 17.14%

If Rilim is 44.2k or 66.5k ohm, variability rate is about same.

But if Rilim is 133k ohm, variability rate is changed from above values.

If you have the graph or data of the variability of current limit inside ADP2387, please share me it.

The limit date of answer to customer is tomorrow(Apr-19 in Japan).

Please advise me.

Thank you,

Tomo

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  • Hi Tomo-san,

    There is no other testing data available except the data shown in the datasheet. I just put them together in the excel sheet. See attached. The Max, Min and Typ lines would help you to visualize the range of the Iocp over Rilim.

    Note that the ILIM current range is 4-15uA, and the ILIM voltage is 0.6V in the Specification Table, therefore the working Rilim range would fall in 40-150kΩ.

    Best regards,

    hyao

    ADP2387IocpvsRilim.xlsx
Reply
  • Hi Tomo-san,

    There is no other testing data available except the data shown in the datasheet. I just put them together in the excel sheet. See attached. The Max, Min and Typ lines would help you to visualize the range of the Iocp over Rilim.

    Note that the ILIM current range is 4-15uA, and the ILIM voltage is 0.6V in the Specification Table, therefore the working Rilim range would fall in 40-150kΩ.

    Best regards,

    hyao

    ADP2387IocpvsRilim.xlsx
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