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TMUX1511: Regarding the Rated Current of TMUX1511

user5236685
Prodigy 20 points
Part Number: TMUX1511

Tool/software:

Dear Forum Members,

I hope this message finds you well.

Question 1: We conducted a test where we allowed a larger current to flow from source to drain when the TMUX1511 switch was ON, anticipating an abnormal current flow. As a result, even when a current of approximately 500mA was applied for a few seconds, no damage to the device was observed. The datasheet specifies a rated current of 30mA, but does the device have more headroom in practice?

Question 2: Subsequently, when an even larger current was applied, device failure was confirmed, and the ON resistance increased from about 5Ω to around 2kΩ. When destruction occurs between the source and drain, does the resistance always increase? Or is there also a possibility of failure occurring in a short mode?

Thank you in advance for your assistance and insights.

Best regards,

Leo

  • 0
    Guru 316690 points

    1. 30 mA is guaranteed. Even if higher currents do not immediately break the device, they might degrade it.

    2. The effects are not predictable. If the overheating also affects other parts of the die, you might get shorts to other pins.