TPS53317A: VOUT Pin

Hello,

The control is based on D-CAP+ mode adaptive time and the ON-time is function of input and output voltage. The cycle begins when the current feedback reaches an error voltage level which is the amplified difference between the reference voltage and the feedback voltage. The VOUT pin should be clean and the noise should not be amplified. The RC is to decouple the switching noise. 10 Ohms and 0.1 uF introduce a 1us time constant. In frequency domain, it is a low pass filter of 159KHz and this is at least 3 times below the lowest switching frequency 600KHz. The RC filter of 10 Ohms and 0.1 uF is recommended because it is optimized and verified on test. 

Is there any reason you want to change the RC to different values?

Please close this thread as resolved if it answer your question.

Regards

Hello，

I have a problem that the output transient response is a little bad, so I want to minish the RC value.

Can you send a scope picture for the transient response?

Regards

The loading is from 0.6 A to 5.4 A.