TPS65218D0: TPS65218D0 - can DDR3L supply also be used for VTT termination

Shinu.V.Mathew

Part Number: TPS65218D0
Other Parts Discussed in Thread: TPS51206

Hi Team,

Can 1.35V generated form the TPS65218D0, DC-DC3 for the DDR3L also used for the VTT termination using a potential divider option. Customer is using only one DDR3L chip.

Regards, Shinu Mathew.

over 4 years ago

0 Brian Berner over 4 years ago

TI__Mastermind 30310 points

Shinu,

Yes, typically you would have a resistor divider, R1 = R2 = 1kOhm such that 1.35V*1k/(1k + 1k) = 0.675V = VTT

You can tweak the total resistance as needed to supply enough current to the VTT supply of the DDR terminator.

You can also wire this voltage divider in parallel to a DDR Terminator IC (like the TPS51206, for example) in case you need that stronger supply at a later time.

0 Shinu.V.Mathew over 4 years ago in reply to Brian Berner

TI__Genius 10620 points

Thanks Brian

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TPS65218D0: TPS65218D0 - can DDR3L supply also be used for VTT termination