TPS75003: When not using buck controller 2 and minimum load current

Shuji Ishiwata

Part Number: TPS75003

Hi All,

I have a question about TPS75003.

(1) Is there a minimum load current value for back controllers 1 and 2?
If so, please tell me the value.

(2)If not use buck controller 2,How should I connect each pin?
　I think that it is as follows.
VIN2:GND
SW2:Open
EN2:GND
FB2:GND
SS2:GND
IS2:GND

Is this correct?

Best Regards,
Ishiwata

over 3 years ago

0 Alex Saenz over 3 years ago

TI__Expert 6700 points

Hello Ishiwata,

Our engineer assigned to this device is out of office this week. Please expect a response by Thursday Jun 30th.

Regards,

Alex

0 Shuji Ishiwata over 3 years ago in reply to Alex Saenz

Mastermind 8610 points

Hi Alex,

Thank you very much for contacting me.
We look forward to your reply.

Best Regards,
Ishiwata

0 Alex Saenz over 3 years ago in reply to Shuji Ishiwata

TI__Expert 6700 points

Shuji,

You're welcome. We should be able to get something to you by the end of the week.

Regards,

Alex

0 Shuji Ishiwata over 3 years ago in reply to Alex Saenz

Mastermind 8610 points

Hi Alex,

I have been waiting for your reply, but have not heard from you.
Could you give us a response?

Best Regards,
Ishiwata

0 Samuli Piispanen over 3 years ago in reply to Shuji Ishiwata

TI__Expert 4985 points

Hi Ishiwata,

Apologize for the delays but due to the independence day in the US the reply will be delayed again. Expect a reply later this week.

BR,

Samuli

0 James Steenbock over 3 years ago

TI__Mastermind 23885 points

Hi Shuji,

1) There is no minimum load current for the buck controllers. When the load current is low enough, the controllers will switch to discontinuous mode in order to maintain efficiency.

2) If buck 2 is not used, the pin connections you have specified should be fine.

Regards,

James

0 Shuji Ishiwata over 3 years ago in reply to James Steenbock

Mastermind 8610 points

Hi James,

I understand.
Thank you for your answer.

Best Regards,
Ishiwata

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TPS75003: When not using buck controller 2 and minimum load current