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LP2951-50-Q1 current limit

I would like to confirm the current limit of LP2951-50-Q1.

In the data sheet, there are typical and maximum value for 25degreeC and the maximum value for all temperature range.

I have a question.

How much is the minimum value with 25degreeC and a all temperature range?

If there are not them, could you please teach the reason they don't need to decide the specs?

Best regards,

Atsushi Yamauchi

  • Hi Atsushi-san,

    For the current limit, what people concerned most is the maximum value. For reference, we also provide the typical value under room temperature (25C) in our datasheet.

    The current limit function is used to limit the maximum output current when output is short to GND, people would not like this value to be too large as it will damage device.

    What we do is to limit the maximum current in a reasonable range (220mA, -40C to 125C), then the minimum current would be definitely smaller than ICL,max but larger than the rated load current 100mA. This would help protect the device, PCB board and as well the power supply from damaging.

    If any other question, please let me know.

    Best regards,
    Jason Liu

  • Dear Jason-san,

    I have the question for the current limit.

    How is the drift of the current limit by the temperature?
    (ex. temperature: high --> the limit: high (like the change by linear), the limit: min the temperature 70 degree C the limit: max 125 degree C, and so on)

    Best regards,
    Atsushi Yamauchi
  • Hi Yamauchi san,

    Current limit would not change too much by the temperature. Below is the test data from ATE.
    Temperature=-40C, min= 159.033mA avg=163.292mA max=171.623mA
    Temperature=25C, min=162.864mA avg=166.269mA max=173.589mA
    Temperature=125C, min=159.269mA avg=162.465mA max=168.131mA

    Best regards,
    Jason Liu