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LM5060-Q1: OUT pin Sink Current

hideyuki sakai
Mastermind 6250 points
Part Number: LM5060-Q1
Other Parts Discussed in Thread: TINA-TI,

Dear, Sir.

My customer is facing a RMA issue.

I tried to simulate using TINA-TI simuation model to clarify the cause.

I am having a several questions through the simuation.

Please give your advice.

1. OUT pin Sink Current.

   I could see the sink current on OUT pin, 2.2mA@EN=Low, 80mA@OVP Fault.

   It seems the internal current source is pulling the current from OUT pin.

   Is it a normal behavior?

2. Maximun Sink/Source Current on each pins.

  The voltage robustness are defined on the datasheet for each pins.

  Is it possible to define the maximun sink/source current on each pins?

Best Regards,

H. Sakai

  • 0
    TI__Guru** 105561 points
    Hi Sakai,

    1. Discharge through OUT pin during OVP fault is the normal device behavior

    2. We have only the typical values for the sinking current.

    Please let me know how much capacitance you have on the OUTPUT. What is your end application use case?

    Best Regards,
    Rakesh
  • 0 in reply to Rakesh
    Mastermind 6250 points

    Dear, Rakesh-san. 

    Thank you so much for your reply. 

    The application is DCDC conveter. LM5060-Q1 is used as the bypass switch 

    from alternator to battery. 

    I am not sure how much capacitor is located on output in my customer side. 

    100nF is located on the reference simulation model. 

    1. Do you mean 100nF like large capacitor must be needed for LM5060-Q1? 

    2. Typical is OK. Is it possible let me know the values on each pins? 

    Best Regards, 

    H. Sakai

  • 0 in reply to hideyuki sakai
    TI__Guru** 105561 points
    Hi Sakai-san,

    1. There is no restriction on the amount of the capacitance at the output of LM5060-Q1 . The device operates even if there is no capacitor at the output.

    2. Typical value of sink current at OUT pin are 2.2mA for normal OFF condition and 80mA during fault event.

    Best Regards,
    Rakesh
  • 0 in reply to Rakesh
    Mastermind 6250 points

    Dear, Rakesh-san. 

    Thank you so much for your information. 

    Regarding sink current, under OVP fault & EN = Low, 2.2mA + 80mA = 82.2mA

    will be total sink current at OUT pin. 

    Correct?

    Best Regards, 

    H.Sakai

  • 0 in reply to hideyuki sakai
    TI__Guru** 105561 points
    Hi Sakai-san,

    Correct. When both the events occur (OVP fault & EN = Low), sink current at OUT pin will be 82.2mA.

    Best Regards,
    Rakesh