TPS74801 output LC filter

K. Sasaki14

Guru 10200 points

Other Parts Discussed in Thread: TPS74801

Is there possibility that LDO output becomes unstable when output LC filter is put in circuit?

If it is so, what condition cause LDO unstable?

Does LDO become unstable condition when frequency of LC filter is in bandwidth of LDO?

ThenI want know bandwidth of TPS74801.

Please tell me this value.

over 11 years ago

0 Hisen Zhang over 11 years ago

TI__Prodigy 615 points

Hi Kohei

One of LDO's functions is that it can filter the input ripples. I would like to know why you need a output LC filter?

Would you please share your schematic of your application ? So that we could figure out whether we need to add the LC filter.

If you need a LC filter for your application, I suggest that you can put the LC filter in front of the LDO.

Best Regards

Hisen

0 K. Sasaki14 over 11 years ago in reply to Hisen Zhang

Guru 10200 points

Hisen-san,

Thank you for your reply.
The schematic information is my customer information.
So I'd like to send to you directly.
Could you tell me your e-mail address?

Best Regards
Kohei Sasaki

0 Hisen Zhang over 11 years ago in reply to K. Sasaki14

TI__Prodigy 615 points

Hi Kohei Sasaki

My email address is Hisen-Zhang@ti.com

Best Regards

Hisen Zhang

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TPS74801 output LC filter