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TPS62700: questions about Inductor selection

Kazuhiko Hirano
Genius 15118 points
Part Number: TPS62700

Hello,

Q1
My customer is considering to use TPS62700 for the following three cases at Vin=3.3V.
Case#1: Vout=2.7V, Iout<50mA
Case#2: Vout=1.6V, Iout<300mA
Case#3: Vout=1.5 to 2.2V, Iout<200mA
What L values does TI recommend for the above three cases respectively?

Q2
My customer would like to use inductors having less than or equal to 1mm height. Datasheet Table 1 shows Ls having > 1mm height.
Can customer use either of the following Ls?

https://www.murata.com/en-us/products/productdetail?partno=DFE201610E-4R7M%23
https://www.murata.com/ja-jp/products/productdetail?partno=DFE201210U-R24M%23

Best regards,

K.Hirano

  • +1
    TI__Mastermind 18590 points

    Hello Hirano,

    Thank you for reaching out. 

    Q1

    I would recommend to go with 3.3 uH inductor. if you further increases or decreases the inductance it effects the inductor ripple current which influences the output voltage ripple

    Q2

    The dimensions showed in the table 1 are some set of recommended inductors at that time. There will be no concern if you use the inductor with 1mm height. please make sure about the inductance and current rating.

    Thank you,

    Regards,

    Moheddin