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Original question:

TPS40090: Design for a synchronous buck

LMZ14202H: design of a multiple output power supply

user5137167
Prodigy 70 points
Part Number: LMZ14202H
Other Parts Discussed in Thread: LMZM23601

Hi,

I am designing a multiple output dc-dc converter. The following is the spec.

Vin: 20 V-36 V, Vo1: 15 V/ 1 A, Vo2: 5 V/1 A, Vo3: -15 V/ 0.3 A.

Do you have any power module realizing multiple outputs? If not, do you have any suggestion for the design?

Thanks!

  • 0
    TI__Guru 50120 points

    Hi user5137167,

    TI's portfolio doesn't have any multiple output power module. However for your application, I'd recommended using the LMZM23601 for the positive voltages( Vo1 and Vo2). For Vo3, you can use the LMZM23601 in an inverting application following the application note(SNVA807). The only caveat to this is that the maximum allowable input voltage is Vin_max + Vo3 = 36V-15 = 21V. This means that for the negative voltage rail, you need to make sure that it will not be more than 20V which is your Vin min. 

    Regards,

    Jimmy

  • 0 in reply to Jimmy Hua
    TI__Guru 50120 points

    Alternatively, for the Vo3 you can use the negative output power module LMZ34002.

  • 0 in reply to Jimmy Hua
    TI__Guru 50120 points
    Hi,

    I'll be closing this thread now. If you reply to this thread, it will reopen and we can continue if you have any more questions that need answering.

    Regards,
    Jimmy