TPS7A8300: Do we have the PSRR data for 1Mhz~20Mhz

Frank Xiao

Genius 12055 points

Part Number: TPS7A8300

Hi team,

My customer wants to use the TPS7A8300 as the filter for the 10k~20Mhz voltage. Do we have the PSRR data for 1Mhz~20Mhz? Thanks.

over 4 years ago

0 JCHK over 4 years ago

TI__Mastermind 43580 points

Hi Frank,

Unfortunately, we do not. The reason is that beyond 1MHz, what you are seeing is the effect of the output capacitor. For additional filtering above 2Mhz, you may want to look at using Ferrites to help filter any high-frequency ripple.

I hope this helps.

0 Frank Xiao over 4 years ago in reply to JCHK

TI__Genius 12055 points

Hi John,

Do you mean the device cannot handle 20Mhz noise? So we can only use the RC filter or π filter to achieve the performance, correct? Thanks.

0 JCHK over 4 years ago in reply to Frank Xiao

TI__Mastermind 43580 points

Hi Frank,

Yes for frequencies beyond 1MHz, all LDO's are dependent on external filtering to filter input ripple. an RC or LC before or after the LDO can help in this range.

Regards,

Power management

Power management forum

TPS7A8300: Do we have the PSRR data for 1Mhz~20Mhz