LM5118-Q1: is there any typo for voltage divider calculation

Dongbao Zhou

Part Number: LM5118-Q1

Hi team,

Could you help confirm the R3 calculation? If Vinmin is 5V and R1 is 75kohm, R3 should be around 22kohm, not 29kohm.

Regards,

Dongbao

0 Brigitte over 4 years ago

Hello Dongbao,

I cannot find a typo in this formula. Where do you see one?

Best regards,
Brigitte

0 Dongbao Zhou over 4 years ago

If Vinmin is 5V and R1 is 75kohm, R3 should be around 22kohm, not 29kohm.

+1 Brigitte over 4 years ago in reply to Dongbao Zhou

Hello Dongbao,

The Vinmin used in this case was 4V as VIN(UVLO) to have some margin for component tolerances and input ripple.

Best regards,
Brigitte

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