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LMQ66430-Q1: [Compal]Schematic review

Far Hung
Expert 5505 points
Part Number: LMQ66430-Q1
Other Parts Discussed in Thread: LMQ66430, LMQ66420

Hi Expert,

Could you help to review the schematic for LMQ66430-Q1?

1.LMQ66430

輸入電壓Vin 12V

輸出電壓Vout 3.6V

Choke 2.2uH (Isat 5A)

power budget  2A

 2.LMQ66430

輸入電壓Vin 12V

輸出電壓 Vout 3.3V

Choke 2.2uH(Isat 5A)

power budget  2.5A

3.LMQ66430

輸入電壓12V

輸出電壓1.1V

Choke 2.2uH(Isat 5A)

power budget  2.3A

TI_LMQ66430_LMQ66420_1.8V_1.2V_1.1V_FAE_0131.pdfTI_LMQ66430_3.6V_3.3V_FAE_0131.pdf

Far

  • 0
    TI__Guru 65515 points

    Hello

    I will review and provide feedback by EOB on Thur. 2/1/2024 PST.

    Thanks

  • 0 in reply to Frank De Stasi
    TI__Guru 65515 points

    Hello

    Here are my comments:

    1. The equations given in the data sheet for the FB resistors provide bounds for those

    resistors and are not design equations.  The design equation for the FB divider is: Vout=Vref*(1+(Rfbt/Rfbb))

    The customer must adjust the FB divider to conform with all of these requirements.

    2. The MODE/SYNC pin can be connected to the VCC pin is desired.  Be aware that the maximum rating

    of the MODE/YNC pin is 5.5V.

    3. Where is the resistor on the PG pin terminated ?

    4. With very low output voltages, additional output capacitance may be needed.

    Please use Webench to provide design guidance to the customer.

    Thanks

  • 0 in reply to Frank De Stasi
    TI__Guru 65515 points

    Hello

    I will close this post due to inactivity.

    Thanks