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LM61435-Q1: SW to GND note explanation and understanding

Part Number: LM61435-Q1

Tool/software:

Hi team,

How to understand with a duty cycle of ≤ 0.01%.?

How to understand the description of negative voltage on SW pin in LM61435 datasheet, which defines Td as 200ns*0.01%= 0.02ns?

  • Hi,

    The 200ns is for transients. Basically if the voltage spike is Vin+2 for less than 200ns, the part will not be damaged.

    The 0.01% is supposed to mean that you should not stay at this voltage for more than .01% of the lifetime of the part. So for a lifetime of 100 thousand hours this is would be 10 hours over the lifetime of the part.

    Regards,

    Rahil