TPS61322: Components Selection for Snubber circuit

Hi Kazuki:

What's the Vin, Vout and load condition?

Hi Minqiu-san,

The condition is Vin:3.3V/Vout:5.0V/Iout:60mA.

I understand that there's no need to add Schottky with snubber since the current is quite low.

However even if in this case, the customer is thinking to make the free land pattern for snubber on the PCB to place components if they face the EMI issue.

Best Regards,

Kazuki Kitajima

Hi Kazuki:

Yes, for such load, there is no need to add schottky or snubber. But it's ok to reserve a place. Back to your questions:

1: The datasheet recommended 5ohm + 120pF, is it okay for 5.1ohm instead of 5ohm?(E24)

yes, it's ok

2: Also is there any other thing we need to take care of such as current rating/DC bias spec.

The layout is importance. Please make sure the Cout put as close as possible to the IC with shortest route

3: In case of just adding snubber to reduce EMI noise, is it okay to use the same recommended value?

Yes. And  if customer so care about EMI, it's recommend to reserve a place for ferrite bead

Hi Minqiu-san,

Thank you for your support!

Relating to #2, the customer is mentioning the current which will go through snubber so they can select the right value.

Is the current value important for selecting components?(I don't think it's not so much since the current would be quite low)

As your comment, the layout is very important. Aside from this, please tell me what else RC spec we can refer to.

Best Regards,

Kazuki Kitajima