LMG5126: Is there any power-up sequence?

Youhei Miyaoka

Part Number: LMG5126

Hello team,

Since my customer cannot find power-up sequence in datasheet, they want to double check that is there any power-up sequence. Can you also check pre-bias(e.g. Vin=12V/Vout=30V) start-up is problem or not.

Regards,

Youhei MIYAOKA

13 days ago

0 Moritz 13 days ago

TI__Genius 17675 points

Hi Youhei,

The power up sequence is not yet in the dataasheet, but it is the normal softstart sequence.

I dont have a concern for pre-biased startup.

Best regards

Moritz

0 Youhei Miyaoka 6 days ago in reply to Moritz

TI__Expert 4555 points

Hi Moritz,

Can you more clarify you mentioned "normal softstart sequence"?

Regards,

Youhei

0 Moritz 6 days ago in reply to Youhei Miyaoka

TI__Genius 17675 points

Hi Youhei,

During the softstart, the device regulates the error amplifiers reference to the SS-pin voltage or the ATRK voltage, whichever is lower.

This will limit the duty cycle during startup and makes Vout rise gradually.

Best regards

Moritz

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LMG5126: Is there any power-up sequence?