TPSM5601R5H: Minimum Output capacitance

Hirotsugu Kobayashi

Part Number: TPSM5601R5H

Hi team,

The minimum effective capacitance when used at 5Vout is about 60uF, but the capacitor used in EVM is only about 33uF.
Is it necessary to have a effective capacity of 60uF or more?

Best Regards,

over 2 years ago

0 Frank De Stasi over 2 years ago

TI__Guru 72035 points

Hello

I will speak with the application engineer that is responsible with this device and get back to you as soon as possible.

Thanks

0 Denislav Petkov over 2 years ago

TI__Mastermind 19891 points

Hello,

It looks like the 2x47uF capacitors on the evaluation board de-rate a bit more than the recommended minimum value. The user's guide for the evaluation board shows the load transient response with those capacitors and the response looks stable. See figure 3-4 here: https://www.ti.com/lit/ug/slvuby4a/slvuby4a.pdf

It looks like the evaluation board offers additional capacitor footprints to optimize the transient response if the application needs it. Perhaps the EVM design optimized solution size over very fast load transients and C7 and C8 were left unpopulated.

I would recommend following the datasheet curve, since it is more conservative design with more margin.

Regards,

Denislav

+1 Frank De Stasi over 2 years ago in reply to Denislav Petkov

TI__Guru 72035 points

Hello

Thank you, Denislav.

I will close this post. If you have further questions please start a new post.

Thanks

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TPSM5601R5H: Minimum Output capacitance