TLV755P: Drop Voltage characteristic

Hi Tamio,

Thank you for reaching out on E2E. Please allow me some time to look into providing this data.

Thanks,
Gerard

Hi, Gerard,

I understand.

Since my customer is assessing TLV75512P in one of some power rails for next year model, we don't have a enough time.

I hope that I will receive the Vdrop characteristic data from you at the early next week.

Thanks

Tamio

Hi Tamio,

I apologize for the delay. The only data available for a similar output voltage is the dropout voltage drift over temperature shown below. This is for 1.5 V output voltage and 500 mA load current:

If this data is not sufficient, some Dropout Voltage vs. Load Current curves can be estimated with information from the datasheet. When the load is between between 100 mA and 500 mA, the curve is linear with a slope of:

Rds,on = Vdo(typ)@(Vout = 1.2 V)/Iout = 500 mV / 500 mA = 1 ohm. 

When the load current is less than 100 mA, the dropout characteristic is non-linear, but can be approximated by two linear segments using the 3.3 V and 5 V plots from the datasheet. The dropout voltage first rises from 0 to 30 mV when the load current changes from 0 to 10 mA, regardless of temperature or output voltage. The line segment from 10 mA to 100 mA just connects the two that have been previously derived. This same process was repeated for the maximum dropout specs given in the datasheet for 85C and 125C. The final graph below was plotted in Excel:

 

Keep in mind that these curves were calculated based on information in the datasheet. If you still require more dropout data at other temperatures or load currents, it will take more time to collect. 

Thanks,

Gerard

Hi, Gerard

I provided my customer with only V_drop vs Iout characteristic you attached.
I think that it is enough data for him to evaluate TLV755P.
I will close this request after I received his feedback.

Thanks
Tamio

Hi, Gerard
I received the feedback from customer.
He asks me to provide the other Vdrop data when Vin=1.7V, to reduce power dissipation.
Basically, I think that the data at Vin=1.7V is similar to the previous data you attached.
Actually, how about that?

By the way, he said that he want to evaluate DQN package. But I can't see the EVM with TLV75512PDQN in website.
He and I can't assemble DQN package. Can you provide me with 1pcs of EVM which assemble TLV75512PDQN?

Thanks
Tamio

Hi Tamio,

The data used to approximate these dropout curves can be found in the electrical characteristics table of the datasheet. For 1.7 V output I used the values highlighted below with the steps described in my previous response:

This data is meant to provide an estimate of the TLV755P dropout voltage. Your customer can get more accurate dropout data by evaluating the LDO with their application's specific conditions. The TLV75512PDQN and other pin-to-pin DQN packages can be evaluated with the Universal Low-Dropout Linear Voltage Regulator EVM. You can find it on the TI store here:

Here is the user's guide:

Thanks,

Gerard

Hi, Gerard

Your data is when Vout=1.7V. The data I want to know is when Vin=1.7V and Vout=1.2V. Basically, I think that the data at Vin=1.7V is the same data as Vin=3.3V.

BTW, I simulated Vdrop based on your information. The below is my data. The slop of my data is different from yours. My data at 85C is almost same with yours at 125C. Can you share your excel file for simulation with me?

Thanks

Tamio