TPS7A45: TPS7A4501 Question About Overshoot at power up

Bob Lee62837

Mastermind 7230 points

Part Number: TPS7A45

Dear support member,

My customer made board of TPS7A4501.

Overshoot at power up was became.

I have a question.

Q1
My customer measured overshoot of about 0.4 V.
Is it reasonable?

Q2
Is there measurement result of power supply rise using the shutdown pin?
Because there was no measurement result in the data sheet.

Q3
Is there anything overshoot remedy?

＜Specification condition＞
Vin:5V
Vout:3.3V
Iout:0.1A

Best regard.
Bob Lee.

over 5 years ago

0 Gerard Copeland over 5 years ago

TI__Genius 10200 points

Hi Bob,

Could you provide some scope shots of the issues you mention in Q1 and Q2?
If possible, providing a schematic of your customer's board would also help me a lot in answering your questions.

Thanks,
Gerard

0 Bob Lee62837 over 5 years ago in reply to Gerard Copeland

Mastermind 7230 points

Dear Gerard,

Thank you very much for reply.

Since I want to send a circuit diagram and waveform,
Could you teach me the private address?

Best regard.
Bob Lee.

0 Gerard Copeland over 5 years ago in reply to Bob Lee62837

TI__Genius 10200 points

Hi Bob,

I have just sent you a friend request over E2E. Once you accept you can send me the files in a private message. There is more info on how to do that here:

Thanks,
Gerard

0 Bob Lee62837 over 5 years ago in reply to Gerard Copeland

Mastermind 7230 points

Dear Gerard,

Thank you very much for reply.

But I confirmed,
Your "connect" button ＞there was not "send a private message" button.

Could you teach me the private address?

Best regard.
Bob Lee.

0 Gerard Copeland over 5 years ago in reply to Bob Lee62837

TI__Genius 10200 points

Hi Bob,

You will have to accept my friend request first to send me a private message. You can find my request in the "Friends" tab of your profile under "Requests to Review".

Thanks,

Gerard

0 Gerard Copeland over 5 years ago in reply to Gerard Copeland

TI__Genius 10200 points

Hi Bob,

Since it has been a couple of weeks since the last response, I am closing this thread. If you have additional questions or feedback, you can post here or send a private message at any time.

Thanks,
Gerard

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TPS7A45: TPS7A4501 Question About Overshoot at power up