LMR43620-Q1: VIN UVLO

Shinji Tsuji

Genius 14099 points

Part Number: LMR43620-Q1

Hi team,

I would like to know the output behavior of LMR43620-Q1 for VEN-VOUT < VIN < VINMIN.

Since there is no description about input UVLO except precision EN and boot UVLO, I believe the device will

start switching in between VEN-VOUT < VIN < VINMIN, is my understanding correct?

regards,

0 Marshall_Beck over 1 year ago

If Vin is greater than Vinmin and EN exceeds, Vinenvout, the device will try and regulate the output.

Vin being greater than Venvout, alone, has no significance.

0 Shinji Tsuji over 1 year ago in reply to Marshall_Beck

Hi Marshall-san,

I would like to double check that in the case of Ven-Vout < VIN < VINMIN,

then the output might start switching, correct?

Or is there Vin UVLO to prevent switching below VINMIN?

regards,

+1 Marshall_Beck over 1 year ago in reply to Shinji Tsuji

they are two, separate UVLOs.

Shinji Tsuji said:
then the output might start switching, correct?

Shinji Tsuji said:
Or is there Vin UVLO to prevent switching below VINMIN?

VINMIN does describe the VIN UVLO

0 Shinji Tsuji over 1 year ago in reply to Marshall_Beck

Hi Marshall-san,

Thank you. I understand output is protected(doesn't switch) below VINMIN.

regards,

0 Marshall_Beck over 1 year ago in reply to Shinji Tsuji

You are welcome.

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