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LM26480-Q1: request schematic review of LM26480-Q1

Part Number: LM26480-Q1
Other Parts Discussed in Thread: LM26480

Dear Sir,

Could you please review attached file of LM26480-Q1.



  • Hi,

    I have forwarded your request to applications engineer supporting this device. Schematic review usually takes time and please allow us some time and my colleague will get back to you.



  • I think the wiring of C106/C107 and C104/R98 is incorrect. As you can see in the EVM layout, the Feedback pin for BUCK1/2 connects to the center tap of the resistor divider and the center tap of the capacitors. 

    In your schematic, the net connecting C106 and C107 should connect to the feedback node FB1, while the net connecting C104 and R98 should connect to the feedback node FB2.

    Also, why is C98=10uF and C95=47uF? The LM26480-Q1 datasheet indicates both input caps can be 10uF.

    Finally, you will need to put the orderable part number on the BOM: please refer to page 3 of the LM26480 datasheet to see the differences between QSQ-AA, QSQ-CF, and QSQ-8D variants of the device.