TIOL111: TIOL111-3 internal LDO PSRR

Iwata Etsuji

Expert 6400 points

Part Number: TIOL111

Hi team,

Could you please share the graph of PSRR vs. Frequency for TIOL111-3?

Best regards,
Iwata Etsuji

over 6 years ago

0 Nozomi Yamasaki over 6 years ago

TI__Prodigy 30 points

Hi team

I'm Nozomi Yamasaki ,TSR working with Iwata-san.

Same customer also requested the graph of PSRR vs. Frequency for TIOL111-5.

So could you please share it as well ?

Best regards

Nozomi Yamasaki

0 Miguel Robertson over 6 years ago in reply to Nozomi Yamasaki

TI__Guru 62920 points

Hello Iwata-san, Yamasaki-san,

Unfortunately we do not have measurements recorded across different noise frequencies for PSRR. I'm checking to see if there are any design simulation results we can share instead. I will get back to you later this week with an update. Sorry for the delay.

Max

0 Miguel Robertson over 6 years ago in reply to Miguel Robertson

TI__Guru 62920 points

Team,

I am still awaiting some feedback from the development team to see if any data may be available. Unfortunately it will likely be next week before I hear back. Thank you for your patience while I research this.

Max

0 Miguel Robertson over 6 years ago in reply to Miguel Robertson

TI__Guru 62920 points

Team,

I now have some feedback to share. We have measured the PSRR for both LDOs across frequency across a few units. It is very similar from unit to unit and is relatively flat in frequency. Here is a summary of the average data recorded:

Frequency (Hz)	5-V PSRR (dB)	3.3-V PSRR (dB)
50	44.0	47.2
100	44.4	47.7
1000	43.8	47.5
10000	39.3	42.7
100000	38.4	42.1
1000000	44.4	49.8

Please let me know if you have any additional questions about this.

Best regards,
Max

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TIOL111: TIOL111-3 internal LDO PSRR