TPS51206 S3 and S5 pins

David Merrill

Other Parts Discussed in Thread: TPS51206

I am designing a power circuit for a DDR3 module using the TPS51206

If I do not plan to use the S3 and S5 pins for power savings, can I just pull them up to VDD? The TPS51206 User Guide has a procedure where those signals start out low and are brought high later, and I wonder if that is a requirement or just the procedure for that test with the development board.

over 13 years ago

0 Nancy Zhang over 13 years ago

TI__Mastermind 49450 points

Hi David,

Usually DDR memory needs S3/S5 to control the three states. If you don't plan to use S3/S5, you could pull them up to VDD. It is no problem. The EVM user's guide just demonstrates the S3/S5 function.

Thanks,

Nancy

Power management

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TPS51206 S3 and S5 pins