TPS54519: PowerGood waveform

Yen Ting Chu

Part Number: TPS54519

Dear Team,

My customer is concerning on the testing waveform for TPS54519.The powergood waveform will have a sudden drop when the enable pin pulls low. Would you please comment on the issue and advice how to solve this concern? Thanks.

Best regards,

Andy Chu

over 8 years ago

0 Vental Mao over 8 years ago

TI__Expert 5745 points

I will double check it and give you reply as soon as possible.

0 Vental Mao over 8 years ago

TI__Expert 5745 points

You can slow the EN falling rate more than 6us to fix this issue.

0 Andy Chen over 8 years ago in reply to Vental Mao

TI__Mastermind 34625 points

Hi,

This glitch is caused by internal disable logic, it can be resolved by slow disable signal as mentioned by Vental, or use R/C filter to remove thw PWRGD glitch.

Power management

Power management forum

TPS54519: PowerGood waveform