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TPS51916
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  • Forum Post: Re: TPS51916 / MINIMUM VIN CAPABILITY

    JohnTucker
    There is no "VIN" pin to the IC. Vin is connected to the drain of the high side switching FET. It can range from 3 to 28 V. So you can use 3.3 V at Vin to convert 3.3 to 1.5 V VDDQ. The "V5IN" pin must be 4.5 to 5.5 V. You have to supply a separate 5 V rail for the converter to function...
    on Jan 8, 2012

  • Forum Post: TPS51916 / MINIMUM VIN CAPABILITY

    Ran Feldman
    Hello, I want to do a design for DDR3 using the TPS51916. The data sheet specifies "Conversion Voltage Range: 3 V to 28 V", I am not sure if this means for all output voltages (VDDQ, VTT, VTTREF) or this means only for VDDQ. In my design I have a 3.3V rail and I understand that I have...
    on Jan 8, 2012

  • Forum Post: Re: TPS51916 V5IN current and maximum DDR3 LDO support

    JohnTucker
    It looks like those V5VIN specs are all for no load. The internal circuits should not demand much current variation over load, but I'm not sure about the MOSFET drivers. I bet they will draw more current under load. The specs are based on how the device is tested at AT, which is probably no load...
    on Feb 28, 2012

  • Forum Post: Re: TPS51916 V5IN current and maximum DDR3 LDO support

    Dan Andersen
    We've calculated +/-1.5A on the DDR - which this appears able to handle. I was afraid of that on the V5VIN. Any way we can get some current numbers on this over load? We've got to figure out what we'll need to supply this....
    on Feb 28, 2012

  • Forum Post: TPS51916 V5IN current and maximum DDR3 LDO support

    Dan Andersen
    We are looking to use the TPS51916 in a 3.3V-1.5V (plus VTT) DDR3 application. It will be supporting 2 banks of 72 bit DDR3 (9 devices). First: It appears the V5VIN current is always <1mA regardless of load or temp. Since we do not have a 5V rail available (and want to minimize cost/size), can...
    on Feb 28, 2012

  • Forum Post: TPS51916 for DDR3L

    Michael Hershkovich
    Hi, I need a reference design for DDR3L power solution using the following components: TPS51916 FET driver csd87331q3d Inductor XAL6030-102MEC 1uH Vin= 5v Vout=1.35v @ 5A max Iout limit for 8A D-CAP 2 @ 500KHz Thanks, Michael
    on Apr 29, 2013

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