TPS61021A: Design consideration when EN pin is directly connected to Vin

Shinichi Inoue

Guru 21676 points

Part Number: TPS61021A

Dear Specialists,

My customer is considering TPS61021A and has a question.

I would be grateful if you could advise.

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I am thinking to connect EN pin and Vin pin directly.

Is there any problem sequentially.

Is it necessary to insert EN after VCC input?

I think generally this is no problem, but mulfunction may occur if Vin rising is slow.

Could you please advise in case of TPS61021A.

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I appreciate your great help in advance.

Best regards,

Shinichi

over 7 years ago

0 Helen chen over 7 years ago

TI__Mastermind 40080 points

EN pin and Vin pin can be directly connected together, its OK, no problem!

0 Shinichi Inoue over 7 years ago in reply to Helen chen

Guru 21676 points

Hi Helen,

Thank you for your reply.

I'll feedback this information with the customer.

I think generally if input power risig is quite slow, it may be malfunctioned.

Is it the same as TPS61021A?

I appreciate your great help.

Best regards,

Shinichi

0 Helen chen over 7 years ago in reply to Shinichi Inoue

TI__Mastermind 40080 points

For TPS61021A, it is OK if the input voltage rise slowly with EN connect to Vin.

0 Shinichi Inoue over 7 years ago in reply to Helen chen

Guru 21676 points

Hi Helen,

Thank you for your reply.

I understand when the input voltage rising is slow, it's no problem.

I'll share this information with the customer.

It seems to be equipped a good sequential circuit between Vin and EN.

I appreciate your great help and cooperation.

Best regards,

Shinichi

0 Helen chen over 7 years ago in reply to Shinichi Inoue

TI__Mastermind 40080 points

You're welcome :)

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TPS61021A: Design consideration when EN pin is directly connected to Vin