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LP5900 - Having damage or not of the device

Other Parts Discussed in Thread: LP5900

Hello,
I have two questions about LP5900.

I attach a file.

LP5900_questions.pdf

Regards,
Dice-K

  • It is difficult to read the scales on the charts from the TINA simulation.

    I presume that LP5900 Vin= 3.80V and Vout= 3.30V

    1) Continuous cycling of the output load current: 300mA for 35 micro-secs, 0ma for 1.965 milli-sec; with Cout = 2 x 10uF

    Q1a : Does the output current of 300mA destroy LP5900?

    A1a: The 300mA will not destroy LP5900, but the output voltage will be out of specification.

    Q1b : Please teach me whether LP5900 is destroyed or not.

    A1b: Will not destroy but the output voltage will be out of specification.

    2) In TINA simulation reverse current is seen at the LP5900 output

    Q2a : Please teach me the reason of the reverse.

    A2a : I suspect either convergence issues, or general inaccuracy of the behavioral model itself when the simulation is run outside the ensured operating range. This reverse current likely does not exist in real device as long as Vin>Vout..

    Q2b : Please teach me whether LP5900 is destroyed or not.

    A2b: Will not destroy as this reverse current is not likely a real event.