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TPS61175-Q1: Layout OK for TPS61175-Q1?

David Sandler
Intellectual 1910 points
Part Number: TPS61175-Q1
Other Parts Discussed in Thread: TPS61175

Hi,

We are laying out a board now using the TPS61175QPWPRQ1. We have followed the layout notes per the datasheet and have come up with the attached layout. We are wondering about the following in the attached layout:

1)      The path for Cin is quite narrow due to limits on the schottky diode pad location. Should this be changed to allow for a wider path? Or can/should components be moved around?

2)      Is the Cin further away from the Vin pin OK?

3)      This is a 14 layer board are we correct to just do the major routing for these components on the top layer were the parts are attached?

4)      Are there any other updates or recommendations for layout for this part?

Thanks,

David'

  • 0
    TI__Mastermind 40080 points

    Power current flow through the inductor, IC, output diode. The current flow through the Vin pin is  very small. Please check the attached picture. only the 0.1uF small cap need to put close to the Vin pin, the big cap filter the power just need to put before the inductor, it can have some distance to the Vin pin. you can refer to the TPS61175 UG for referecne.  You can put serveral GND under the top layer.