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Selection of Inductor for channel 3 of ADP5054

priya_mp
on Feb 1, 2021

Hi,

We are using ADP5054 in our design.We need to derive 5.5V with 1A load current from Channel 3 of ADP5054.

I gave this inputs in ADP505x_Buck designer tool and tool suggests to use 12uH SD43-123MLB. Is it fine to go ahead with this inductor MPN?

Thanks

Priya

 
  • +1
    •  Analog Employees 
    on Feb 2, 2021 1:41 AM 2 months ago

    Hi, 

    The ADISimPower tool for the ADP5054 is reliable and the inductor that it gave you should be fine. Make sure that your settings are correct and fit your needs. It may give you a different inductor depending on your design criteria, i.e, lowest cost, most efficient, etc..

    Regards,

    Fritz

  • 0 on Feb 4, 2021 7:10 AM 2 months ago in reply to FCGonzales

    Hi Fritz,

    Thanks for the reply.

    We are actually deriving 5.5V with 1.5A current requirement.

    I have attached the schematic of that portion below.Please give feedback with reference to schematic.

    Query with ref to Compensation network values:

    Please suggest the values for compensation network R3022 and C1864.I got those values from ADP505x Buck designer tool but there is only 1 output capacitor in tool schematic where as in our case we have 4 output capacitors which may change the values of compensation network as per datasheet.So little confused in choosing the values.

    Thanks

    Priya

  • 0
    •  Analog Employees 
    on Feb 17, 2021 2:35 AM 2 months ago in reply to priya_mp

    Hi Priya,

    The excel tool usually supports change of output cap but only to a limited value. If you need higher values, one way is to test in bench by checking start-up response, output step load and bode plot at different conditions then tweak compensation values as you move along with datasheet equations.