TPS650250 Max value of tss

Dear Michael

Could you take a simulation data of Tss?
Our customer has concerned whether TPS650250 can use as VDD of TLK110.
Because TLK110 require VDD rise time is up to a couple milliseconds.

Are there any concern as above?

Best regards.

Hi Alpha,

Why is the TLK110 requiring milliseconds ramp time of VDD? I don't see that specified in the datasheet.

Dear Micheal

Can Customer assume Tss of TPS650250 is not over a couple milliseconds?

Best regards

Hi

Max ramp up time is not guaranteed. It can depend on the Cout and loading specific to only the customers application. The typical number is in reference to the typical use case or application with the recommend Cout and such.

I recommend the customer try their loading and Cout on an evm. Otherwise, if they use the same typical application recommendations then I don't expect a dramatic increase in ramp up time. This however, assumes that they enable the DCDC with a valid VIN already present and able to supply the DCDC demands.

Our customer would like to make sure that TPS650250 startup time is not more than 2,3ms at customer condition.

> It can depend on the Cout and loading specific to only the customers application.

Regarding as above , customer condition is Cout : 95uF and power consumption is 55mA at powerup.

> This however, assumes that they enable the DCDC with a valid VIN already present and able to supply the DCDC demands

Customer has confirmed what you mentioned.

In the condition as above , does customer need to concern about more than 2ms startup time?

Best regards.

Hi,

Thank  you providing specific conditions. We can test this in the lab to get a feeling for it but, there will still not be any guarantee to the spec.

Will this do?

Dear Michael

Our customer said if you can provide test data , it is very useful for them.

Could you please test this in your lab?

Customer operation condition is as follow.

Output : VDCDC1
Voltage : 3.3V fixed
Cout : 95uF
Power consumption(at power up) : 55mA

Our customer also need datas including variation cause of lot and temperature.

Best regards.