TPS65133: power solution for opa810 & ths4551 & ads127L11

Hi Liping,

May I know your current spec requirements of +/-5V rails? And do you need digital interface like I2C of the +/-5V power IC?

BR

Patrick

<150mA. and no need I2C.

You need to take care OP and ADC to achieve best formance.

Hi Liping,

Ok, allow me some time fo find the better solutions.

BR

Patrick

Hi Patrick,

Here is my overall updated power architecture.

Please help to check if it's best solution or any other recommendation.

The number in the picture is the current consumption.

Hi Liping,

Due to some conflicts, I will reply to you tomorrow.

BR

Patrick

Hi Liping,

You could consider TPS65132S.

BR

Patrick

Hi Patrick,

Thanks a lot for your recommendation.

Since I am not sure the noise level and PSRR of TPS65132S.

I add LDO TPS7A20 and TPS7A30 for analog circuit to achieve best performance.

Do you think it will be good for opa and analog circuit?

Do you think it's necessary to add them?

Hi Liping,

There are some figures listed in our datasheet related to voltage ripple, like Figure 24, Figure 25 and Figure 26 for your reference.

BR

Patrick

Yes, I see. It's in mV level. But LDO TPS7A20 and TPS7A30 is at uV level.

So I prefer to use it. Do you see any problem?