LM5117: external VCC tie to VIN

Ann_Lien

Part Number: LM5117

Hi expert,

Customer is using our LM5117 in their infotainment application. Condition is 11V/9.5V/6.5V to 5V/12A. They want to tie VCC to Vin with a low pass filter to increase efficiency. Would you kindly help to verify if we can connect external VCC source to VIN? Thanks!

Best regards,

Ann Lien

over 6 years ago

0 David Baba over 6 years ago

TI__Mastermind 40040 points

Hello Ann,

As long as the As Max voltage of VCC (14V) is not violated, then yes can be Tied to Vin. If Vin>VCC(max), can tie Vout to VCCDIS which will disable the internal VCC regulator.

hope this helps?

0 Ann_Lien over 6 years ago in reply to David Baba

TI__Genius 14430 points

Thanks a lot for your prompt help, David!!

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LM5117: external VCC tie to VIN