REF3030: Need more information as references

Noriyuki Takahashi

Part Number: REF3030
Other Parts Discussed in Thread: REF3330, REF3033, REF3025

Hi team,

Could you share below information? We are considering whether REF3030 can be used in the system. One big concern is the dropout voltage. In order to estimate the dropout voltage, we need these information. REF3033 has enough information, so we hope REF3030 has similar information with REF3330.

1. REF3330's Dropout Voltage vs Load Current for each temperature(I mean the figure in the datasheet P.1)

2. REF3030's more detailed Functional Block Diagram(I hope you can share it like REF3330).

3. REF3030's Dropout Voltage(max) at the temperature range from 0 to 70 degree C at I_load = 2mA.

Regards,

Noriyuki Takahashi

over 5 years ago

0 Marcoo Z over 5 years ago

TI__Mastermind 19370 points

Hi Takahashi-san,

I see your request for REF3025 data. I can look at what we have available, if we do not have it I have to look into doing a bench test. I have a question about your request.

1. Do you need REF3330 or REF3030? If this is REF3030 is it sufficient to have -40C, 125C curves like the REF3330?

2. I can look into this for you.

3. I understand.

-Marcoo

0 Noriyuki Takahashi over 5 years ago in reply to Marcoo Z

TI__Genius 9245 points

Marcoo

Thanks.
1. I need REF3030.

Regards,
Noriyuki Takahashi

0 Marcoo Z over 5 years ago in reply to Noriyuki Takahashi

TI__Mastermind 19370 points

Hi Takahashi-san,

I could not find data on this device so I will try to bench test this.

-Marcoo

0 Noriyuki Takahashi over 5 years ago in reply to Marcoo Z

TI__Genius 9245 points

Marcoo,

Thank you for measuring data for 1 &3!
Then could you provide 2, at first?

Regards,
Noriyuki Takahashi

0 Marcoo Z over 5 years ago in reply to Noriyuki Takahashi

TI__Mastermind 19370 points

Hi Noriyuki-san,

I am working on the bench test for this device. I am trying to finish by this week.

I have reached out to my internal team regarding #2 to see what we can and cant show.

-Marcoo

0 Marcoo Z over 5 years ago in reply to Marcoo Z

TI__Mastermind 19370 points

Hi Noriyuki-san,

1. Here is the dropout voltage graph over temperature.

2. Here is a better block diagram. The overall system architecture is similar to the REF33xx and all other REF devices.

3. I tested 2mA on the bench from -40C to 125C. I could not get a dropout lower than 50mV. Due to the datasheet I cannot recommend a dropout voltage lower than 50mV. The 50mV also apply to 0C and 70C.

-Marcoo

0 Noriyuki Takahashi over 5 years ago in reply to Marcoo Z

TI__Genius 9245 points

Marcoo,

Regarding 3), our request is the maximum dropout voltage of REF3030 from 0 to 70 degree C & I_load = 2mA.
It seems that you are mentioning the min value.
Could you measure the max value as reference?

Regards,
Noriyuki Takahashi

0 Marcoo Z over 5 years ago in reply to Noriyuki Takahashi

TI__Mastermind 19370 points

Hi Noriyuki,

Sorry, I might of caused some confusion.
The maximum voltage dropout is 50mV for 2mA from 0C to 70C.
For 2mA load, from -40C to 125C I did not need more than 50mV on the devices I tested so that is the reason I choose 50mV as max.

-Marcoo

Power management

Power management forum

REF3030: Need more information as references