TPSM82902: OCT FPGA in DDR2

Najib Maalouf

Prodigy 20 points

Part Number: TPSM82902

Tool/software:

Hello,

Can TPSM82902SISR be used as a power supply for termination resistors VTT (OCT) of an FPGA in DDR2 application?

Best regards,

6 months ago

0 Rupayan Saha 6 months ago

TI__Intellectual 2230 points

Hi Najib,

I will check and get back to you.

Regards

Rupayan

0 Rupayan Saha 6 months ago in reply to Rupayan Saha

TI__Intellectual 2230 points

Hi Najib,

Can you please tell that what is VTT(OCT) of a FPGA?

Regards

Rupayan

0 Najib Maalouf 6 months ago in reply to Rupayan Saha

Prodigy 20 points

Hello Rupayan,

In fact this is the power rail that supplies the On Chip Termination Resistors of the Data lines of a DDR2 bus inside the FPGA

in this scenario, TPSM82902SISR will be sourcing and sinking current based on high or low state of data line

Is TPSM82902SISR able to sink and source current?

Regards,

Najib

0 Rupayan Saha 6 months ago in reply to Najib Maalouf

TI__Intellectual 2230 points

Hi Najib,

TPSM82902SISR is only able to source current.

Regards

Rupayan

0 Najib Maalouf 6 months ago in reply to Rupayan Saha

Prodigy 20 points

Rupayan,

What happens if current is being sinked into TPSM82902SISR ?

Regards,

Najib

+1 Rupayan Saha 6 months ago in reply to Najib Maalouf

TI__Intellectual 2230 points

Hi Najib,

If you sink the current then due to reverse current protection the buck will not work.

Regards

Rupayan

Power management

Power management forum

TPSM82902: OCT FPGA in DDR2