LM5145: BST-GND stress

Given Ding

Part Number: LM5145

Hi,

just want to check if it's OK that BST-GND is -1.6V/5.986uS when do Vout short test since datasheet mentioned -0.3V spec.

0 Katelyn Wiggenhorn over 6 years ago

Hello,

Let me confirm with the product expert on your question.

Best Regards,
Katelyn

0 Timothy Hegarty over 6 years ago

Hi Given,

If SW also going negative and BST is following it? If so, then BW-SW is not going substantially negative.

Regards,
Tim

0 Given Ding over 6 years ago in reply to Timothy Hegarty

So, BW-SW is the main concern that it cannot go to negative, right?

0 Timothy Hegarty over 6 years ago in reply to Given Ding

Hi Given,

As mentioned by email, BST-SW is the key voltage here. The transients in the above plot are very short duration (<10ns), should not pose an issue.

Tim

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