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Buck regulator suggestion for Vin=15V, Vout=0.72V, Iout=9.0A

KLP KLP
Prodigy 60 points
Other Parts Discussed in Thread: TPS543B22

Hi all,

Good morning. We wish to revisit into our power design with this requirement –

Vin = 7V to 15V

Vout = 0.72V

Iout = 9.0A

Ripple < 10mVpp

Power efficiency >85%

Do you have any recommendations that I could further check on? I have shortlisted quite a number of these a year back, but a lot of them has the Vin(max)=16V. We have concern on this as our adapter input is 15V ±3%. (max 15.45V). Do you think this would be a valid concern with the consideration of Vin p-p?

Many thanks.

KLP

  • 0
    TI__Genius 17070 points

    I would recommend the TPS543B22.   It will release in December, the product folder is located here https://www.ti.com/product/TPS543B22

    The input ripple requirement can be meet with additional capacitors or a ferrite bead on input.

    The efficiency is greater than 85% at 9A with 12V input at 1000kHz switching frequency.   

    Using the 750kHz or 500kHz switching frequency, the efficiency will greater than graph below.