LM5116: Power up sequence

Kotaro Yamashita

Intellectual 2530 points

Part Number: LM5116

Hi Team,

Is there any spec of sequence about VCCX and VIN?

For reducing power consumption, I'd like to use external supply for VCCX but this maybe applied faster than VIN.

In this case, Is there any concern?

Regards,

Kotaro Yamashita

over 6 years ago

0 Samuel Jaffe over 6 years ago

TI__Mastermind 25590 points

Yamashita-san,

Most applications use VOUT for VCCX so this is not an issue. We typically recommend that the part be powered on before applying any external voltage but I will need to double check for this case. I'll reply with a confirmation in a day or two.

-Sam

0 Samuel Jaffe over 6 years ago in reply to Samuel Jaffe

TI__Mastermind 25590 points

Yamashita-san,

Confirmed. VIN should always be above VCCX at all times to prevent reverse conduction.

-Sam

Power management

Power management forum

LM5116: Power up sequence