LM5176: ripple issue in light load

GARETH OU

Guru 11375 points

Part Number: LM5176

Customer test has a problem
Waveform. Light load (0A) at 12.5V~12.7V to 12V
Why does the entire voltage float?

over 4 years ago

0 Brigitte over 4 years ago

TI__Guru 65280 points

Hello Gareth,

To me this looks like normal regulation behavior as the device is in the middle of buck-boost operation, noise on the board can easily get it from buck into boost mode or vice versa. The ripple is still within a range that I think is ok.

0 GARETH OU over 4 years ago in reply to Brigitte

Guru 11375 points

Hi Brigitte

Thank you

Can you provide EVM Gerber files?

0 Brigitte over 4 years ago in reply to GARETH OU

TI__Guru 65280 points

Hello Gareth,

The Altium files are in the tool folder of LM5176EVM-HP. Are these ok as well?

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LM5176: ripple issue in light load