TPS63030 and TPS63031 reference circuit

Prescott Siao

Intellectual 2220 points

Other Parts Discussed in Thread: TPS63031, TPS63030

Hi team,

We have a question about VINA pin.

2 reference designs in datasheet are different that the one for TPS63031’s VINA should pull high.

On the other hand, TPS63030 VINA and EN series capacitor to GND.

Could you let me know which one is correct?

Could you let me know whether that capacitor is with arrowed resistor as filter and what value for that resistor?

In my acknowledgement, if VIN pull high, that resistor becomes useless. Am I right?

Is the resistance inside IC for R-C filter?

What resistance for that?

Thanks.

Prescott

over 10 years ago

0 Florian Feckl over 10 years ago

TI__Expert 7110 points

Both Application circuits are correct.
This device features an internal resistor between VIN and VINA to create an RC-Filter. This is to filter noise from the sensitive VINA Node of the device.
In typical cases, where the input voltage is not noisy, this is not needed. In cases where there is noise present, this can be applied.
Let me check the value of the internal resistor and come back to you,