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TPS543620: Regarding output inductor

prema R
Intellectual 700 points
Part Number: TPS543620
Other Parts Discussed in Thread: TPS543320

Tool/software:

Hi

We are using TPS543620 along with PMIC TPS6508641. We are using 7440680056 for output inductor(5.6uh) as per test bench simulation. However the form factor is high. Our board size is small and hence we need smaller footprints.

Our load current is 0.071A and vout = 0.72V. Kindly suggest suitable inductors with small form factor

  • 0
    TI__Mastermind 23715 points

    The low setting for current limit is 4.5A for TPS543620. The Isat of the inductor must be greater than 4.5A.     Using a 6A rated device for <100mA is not optimal.   

    The TPS543320 is the 3A pin to pin version of TPS543620, it has current of 3.3A, lower but still probably not that much size savings.   7440680056 has an Isat of 1.4A, which is too low for TPS543320.   See IHLP2020CZER4R7M01 inductor,  I found it on digikey parameter search by putting an inductance range and Isat current greater than 3.5A.    The x and y dimension and z dimension are selectable too.