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TPS65911: What is the meaning of the "MEMORY SUPPORT" in section 3.1 of the datasheet?

Dan Klepper
Prodigy 250 points
Part Number: TPS65911

there is no further explanation to the MEMORY SUPPORT sentence , does is mean that the chip can power the mentioned memory ? if so , for how many  WATTs ??

  • 0
    TI__Genius 9655 points
    Hi Dan,
    yes, selected variants for specific processor can supply the external DDR. How much drive-current is available depends on the current need of the SOC of the DDR-supply and the assigned rail. Please refer to the user-guide, e.g. www.ti.com/.../swcu176.pdf : Here VDD2 is driving the DDR-rail of the SOC and the external DDR. VDD2 has a capability of 1.5A (allow for margin, e.g. for inrush-currents and load-steps!), hence it can drive 1.5A minus margin minus the SOC-DDR-power-need.
    Which processor do you intend to supply, hence which device variant are you eying at?
    Best regards,
    Frank
  • 0 in reply to Frank Dehmelt
    Prodigy 250 points

    Frank Hi , 

    I intend to supply the Zynq7015 - however i prefer to use the TPS659119-Q1 (automotive).

    I also intend to use an interface of the SoC with 2 chips of  2Gb DDR3L (a total of 4Gb).

  • 0 in reply to Dan Klepper
    TI__Genius 16410 points
    Hi Dan,

    Frank's comments apply also for TPS659119-Q1. In the integrated bucks, it can support up to 1.5A DC load, and is capable of powering an external DDR supply. And it's recommended to take some margin for load steps and inrush.

    Note that each memory type has a different supply voltage. So you'll need to make sure the EEPROM has the correct voltage on the rail for your DDR type, or else used the test boot mode where all rails are OFF by default and you can sequence each rail by I2C.

    Regards,
    Karl