Could TPS51100 support DDR3L?

Kai Hsiao

Other Parts Discussed in Thread: TPS51100, TPS51200, TPS51206

We want to design TPS51100 for DDR3L ,but TPS51100 only describe that can support DDR3 in the datasheet ,could TPS51100 support DDR3L

Or if we want to design VTT solution for DDR3l and DDR3 at the same time ,what device can do?

over 10 years ago

0 JohnTucker over 10 years ago

TI__Guru**** 191445 points

What are your power requirements? Can you tell me Vin, Vdd and Vtt?

0 Kai Hsiao over 10 years ago in reply to JohnTucker

Guru 12675 points

Dear John

Thanks for your reply

Currently!! We want to use TPS51100 to replace RT9026 (Richtek) ,It's pin to pin solution ,

RT9026 can support DDR3L of VTTQ (page 5 in the datasheet) ,so we want to confirm TPS51100 can have the same feature and can replace RT9026 directly

0 JohnTucker over 10 years ago in reply to Kai Hsiao

TI__Guru**** 191445 points

My research indicates that DDR3L is low power version of DDR3. For DDR3L, VDDQ = 1.35 V an therefore VTT = 0.65 V. For TPS51100, the minimum VDDQSNS and VLDOIN is 1.2 V, so TPS51100 should work well for DDR3L, but there is no performance data for it, only for DDR (VDDQ = 2.5V) DDR2 (VDDQ = 1.8 V) and DDR3 (VDDQ = 1.5 V)

0 Kai Hsiao over 10 years ago in reply to JohnTucker

Guru 12675 points

Dear John

Thanks for your information !!

0 Nancy Zhang over 10 years ago in reply to Kai Hsiao

TI__Mastermind 45820 points

Hi Kai,

TPS51100 may support DDR3L. But we don't have any test data to support it. TPS51200 and TPS51206 can definitely support DDR3L application. Attached files are test reports. Please review them.

Thanks,

Nancy

3175.TPS51200(HPA322)E2 EVM test report.xls

6330.TPS51206EVM test report.xls

0 Spiros Villis over 9 years ago in reply to JohnTucker

Prodigy 10 points

John / Kai: have you found out if the TPS51100 works well for DDR3L (VTT = 0.65V); i.e., do you have performance data for it by now? IF not, do you still stand by your statement that in theory, based on datasheet understanding, the TPS51100 "should work well for DDR3L" (from John post May 6, 2013 at 1:09PM)

0 JohnTucker over 9 years ago in reply to Spiros Villis

TI__Guru**** 191445 points

I do not have any data for it. I still believe my reading of the datasheet is correct, that it will output VTT down to 0.6 V.

0 Sujay Arasegowda over 7 years ago in reply to JohnTucker

Intellectual 660 points

Hi Even i have the same doubt and designing a VTT regulator for DDR3L RAM,

John / Kai Hsiao can you please let me know, is TPS51100 working fine in your board?

Regards

Sujay A

Power management

Power management forum

Could TPS51100 support DDR3L?