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TPS712: LDO EVM Doc missing BOM + measurement findings

Hua Chen
Prodigy 100 points
Part Number: TPS712

Hi, TI STAFF,

1). Looking for the missing information of those NOT POPULATED parts in BOM docs. 

TPS712xxEVM User's Guide: (https://www.ti.com/lit/ug/sbvu010/sbvu010.pdf?ts=1707263307112&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FTPS712)

Could you provide those BOM values?

2). I tried to implement 4 LDO outputs according to this same EVM docs. Attached pictures, and I found the actual measurements (light load) show different output voltage saturation levels:

NAMES                VIN                 VOUT(Saturation)

DVDD_LDO         >=2.7V            1.7V

VDDPST_LDO     >=5V               4.7V   (This one seems to work well at light load)

VBVCO_LDO       >=2.6V            1.8V

AVDD_LDO          >=3.1V            3.0V

Could you comment on BOM value selection? And, let me know if you find any issue of my implementation? 

thanks!

  • 0
    TI__Mastermind 18466 points

    Hey Hua Chen, 

    Hua Chen said:
    Could you provide those BOM values?

    I tried looking through the old Altium files and, unfortunately, whatever is on the User's Guide is all I have available to me. 

    Hua Chen said:
    I found the actual measurements (light load) show different output voltage saturation levels

    What are you considering as a light load?

    Hua Chen said:
    And, let me know if you find any issue of my implementation?

    is your R1 value actually 200k? or what are your resistor values?

    Best,

    Juliette