LM61460: SW waveform negative voltage expliantion

Yishan Chen

Part Number: LM61460

Tool/software:

Hi Team,

When customer tests LM61460, they found such waveform in SW point, Could you please give us some insight about why it have a second negative voltage platform and is the negative voltage is ok for LM61460?

The negative voltage is about -1V,0.3nS

Thank you,

Yishan Chen

8 months ago

0 Frank De Stasi 8 months ago

TI__Guru 73585 points

Hello

The negative excursion indicates that the body diode of the LS FET is turning on during the

momentary Hi-Z state of both the HS and LS FETs; it is normal operation.

However, please provide your schematic and images of your PCB layout so we can

review your design in more detail to ensure you have a robust design.

Also, provide your input and output parameters.

Thanks

0 Frank De Stasi 8 months ago in reply to Frank De Stasi

TI__Guru 73585 points

Hello

I will close this post due to inactivity.

Thanks

Power management

Power management forum

LM61460: SW waveform negative voltage expliantion