LP8868Y-Q1: Schematic review

Hi,

I will check it and give you a feedback late.

Hi, Joey

Pls see my feedback in below:

• For high frequency input cap, it is better to put it close to L27 in the the layout.
• Pls add a 50 Ohm resistor in series CSN and RSENSE to protect internal CSP-CSN loop.

• May I confirm, what is the purpose of D2?

Other is fine from my side.

Hi Zhiqian,

Please review update schematic and recommend removable device on the schematic and value as well.

LP8868Y_Schematic_Aug_2.pptx

Best regards

Joey Kim

Hi Joey,

Our expert is currently out of office. He will reply to you next Monday. Thanks for your understanding. 

Best Regards,

Steven

HI, Joey

I find the OVP resistor is 30k/20k, it is doesn't match with the design, for buck-boost topology, the OVP threshold needs to consider as VIN+VF. Other is fine.

Hi Zhiaian,

What value of Resistor are you recommend for OVP resistor?

If you have LP8868Y-Q1 calculator sheet, please share it with me.

Best regards

Joey Kim

Hi, Joey

Sure, I will send it to you tomorrow.