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Why does the LTC2485 datasheet say to use a tantalum Vcc bypass capacitor?

Category: Datasheet/Specs
Product Number: LTC2485

Page 10 indicates that the Vcc should be bypassed with a 0.1uF and 1 uF caps.  It says that the 1 uF should be Tantalum. Why is this?

www.analog.com/.../2485fd.pdf

Top Replies

    •  Analog Employees 
    Feb 7, 2024 +1 verified

    Hello  ,

    Tantalums are preferred because the internal LDO needs to have a high-ESR capacitor to ensure stability across operating conditions. Well, this is not strictly tantalum, you can add in place…

  • Hello  ,

    Tantalums are preferred because the internal LDO needs to have a high-ESR capacitor to ensure stability across operating conditions. Well, this is not strictly tantalum, you can add in place a ceramic capacitor with a series resistor of maybe 5-10 ohms. But then, that would be an extra component added to the BOM.

    Regards,

    Yugel