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LM5050-1: Difference between LM5050-1, LM5050-2

Part Number: LM5050-1
Other Parts Discussed in Thread: LM5050-2

Hi expert,

I see LM5050-1 and LM5050-2 are almost the same just different in the minimum input voltage. The minimum Vin for LM5050-2 is 6V, while the minimum Vin for LM5050-1 is 5V. Are there any other difference between these two devices?

  • Hi Lenna Yan,

    LM5050-1 has a separate Vs pin for internal bias supply, but LM5050-2 does not have it (instead internal bias is taken from OUT pin itself).

    This allows LM5050-1 to be operated for Power Rails (VIN) down to 1V, by supply external bias supply on VS pin >5V.

    Technically LM5050-1 can be operated down to 1V with external bias but LM5050-2 minimum operating is 6V.

    Additionally LM5050-2 has FET fault status on nFGD pin (used in conjunction with OFF pin) to detect MOSFET status.