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LMR23625: Support for zeta buck-boost implementation

Matt Calvo
Genius 13885 points
Part Number: LMR23625
Other Parts Discussed in Thread: TPS552872

Hey Buck Regulator Team,

I have a customer considering using the LMR23625 for a new project and we were hoping you could provide some feedback and design guidance.

The key requirements are outlined below:

1. Cost target: $1
2. Foot print: ~210 mm^2
3. 3.5V minimum, 12V nominal. 30V max
4. Current rating of 2A.
5. Adjustable output Voltage. The nominal voltage is 5.15V
6. Output Sink current capable

The device would need to be used in a topology that allows for a positive output voltage that can be greater than, equal to or less than VIN. They are currently considering LMR23625 due to this post about using this regulator in a Zeta topology: LMR23625 or LMR23630: Zeta Converter Buck/Boost implementation

Do you recommend this solution or should we be considering a different option? 

-Matt Calvo

  • 0
    TI__Guru 50120 points

    Hello Matt,

    Are there any issues using one of TI's buck boost devices?

    I am not too familiar with this zeta topology, but if the goal is to have regulation the allows Vout greater than, equal to, or less than Vin, then a buck boost should be sufficient here.

    Looking at the ti.com parametric search, the closest device that would meet your application needs is the: https://www.ti.com/product/TPS552872

    Will reassign this to BCC org to have appropriate engineer looking to support the TPS552872 request.

    Regards,

    Jimmy

  • 0
    TI__Mastermind 19510 points

    Hi Matt,

    Thanks for reaching out.

    I also found your email regarding this topic, let's keep on the discussion on email, I will close this thread. Thanks.

    BRs,

    Bryce