TPS629210: Schematics Review & Power Sequencing of Rails

Lukasz Kawinski

Part Number: TPS629210
Other Parts Discussed in Thread: TPS62901

Hello,

I've been working on the power supply unit with multiple rails.

The design should have the following output rails: 5V @ 1A, 3.3V @ 1A, 1.8V @ 200mA. I've been using 3x TPS629210 for this task.

Could someone please comment on the schematics, which I am attaching below? I'm mostly curious about sequencing the rails: I would like the 5V Rail to come up first, then 3.3V and 1.8V in the end. Thank you in advance.

Best Regards,

Lukasz Kawinski

11 months ago

0 Colin Chen 11 months ago

TI__Genius 17561 points

Hello Sir,

We are on vocation from 4/04 to 4/06 and will reply you next Monday.

Sorry for late.

Colin

0 Colin Chen 11 months ago in reply to Colin Chen

TI__Genius 17561 points

Hello Sir,

The schematic looks good to me.

For sequencing the rails, it is suggested to use TPS62901 as it has SS/TR pin.

Below is app note for your reference:
https://www.ti.com/lit/an/slva470a/slva470a.pdf?ts=1712547176356&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FTPS62135%253FkeyMatch%253Dtps62135

Thanks

Colin

0 Lukasz Kawinski 11 months ago in reply to Colin Chen

TI__Prodigy 445 points

Hello Colin,

TPS62901 is a boost, not a buck, so it would not be a good solution in this application. Could you please recommend something that would be more suitable?

Thank you,

Lukasz Kawinski

+1 Colin Chen 11 months ago in reply to Lukasz Kawinski

TI__Genius 17561 points

Hi Sir,

TPS62901 is a buck converter...

Thanks

Colin

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TPS629210: Schematics Review & Power Sequencing of Rails