BF518 VDDINT

Hey,

The BF51X manual says that the max voltage for VDDINT is 1.47V, however int the VDDINT vs IDD and VDDINT vs fCCLK tables it goes up to 1.5V. For a new revision of a custom board, I would ideally like to run VDDINT at 1.5V as it is easier to sourve a fixed LDO regulator than say 1.4V or 1.45V etc and would therefore cut down on BOM. I guess the question then is 1.5V really outside the safe operating range?

And a related question, is anyone aware of a single chip powering solution or multiple output regulator suitable for powering the BF51X (i.e. supplying 1.4V, 1.8V, 2.5V and possible 3.3V). I have had a browse of Digikey and the 1.4V doesn't seem to be a common voltage for fixed regulators.

Thanks..

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    •  Analog Employees 
    on Mar 9, 2012 1:09 AM over 9 years ago

    Hello,

    We do have highly integrated power management devices suited to power the Blackfin family. Two devices that you can consider are:

    ADP5037: http://www.analog.com/static/imported-files/data_sheets/ADP5037.pdf

    ADP5034: http://www.analog.com/static/imported-files/data_sheets/ADP5034.pdf

    Both parts have the same architecure and number of regulators (two BUCKs and two LDOs), the difference is the current driving capability for the BUCKs which is 800mA for the ADP5037 and 1.2A for the ADP5034, the LDOs in both versions can deliver up to 300mA.

    These devices are offered in adjustable and fixed output voltage versions, we do not have devices released with the output voltage configuration you have requested but are all available as special options. In order to release a special option we need a minimum quantity to be ordered. If your design can afford external resistor dividers I suggest to consider the adjustable versions. These devices requires very few external components and small inductors since operating at 3MHz.

    Please let me know if you need additional information.

    Regards,

    Maurizio

Reply
  • 0
    •  Analog Employees 
    on Mar 9, 2012 1:09 AM over 9 years ago

    Hello,

    We do have highly integrated power management devices suited to power the Blackfin family. Two devices that you can consider are:

    ADP5037: http://www.analog.com/static/imported-files/data_sheets/ADP5037.pdf

    ADP5034: http://www.analog.com/static/imported-files/data_sheets/ADP5034.pdf

    Both parts have the same architecure and number of regulators (two BUCKs and two LDOs), the difference is the current driving capability for the BUCKs which is 800mA for the ADP5037 and 1.2A for the ADP5034, the LDOs in both versions can deliver up to 300mA.

    These devices are offered in adjustable and fixed output voltage versions, we do not have devices released with the output voltage configuration you have requested but are all available as special options. In order to release a special option we need a minimum quantity to be ordered. If your design can afford external resistor dividers I suggest to consider the adjustable versions. These devices requires very few external components and small inductors since operating at 3MHz.

    Please let me know if you need additional information.

    Regards,

    Maurizio

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