LP5520: Question matters

user5762398

Part Number: LP5520

Hi all.

Could you answer some questions?

①Can I use the separate power supply without using SW / FB pin?

If it is okay to use a separate power supply, can the SW / FB pin be left unconnected?

②I use manual mode.When using the manual mode, is it not necessary to use the VLDO / S1-IN / S2-IN pin?

If it is not necessary to use it, is the connection of VLDO / S1-IN / S2-IN pin as shown in the figure and correct?

I look forward to hearing from you.

Syunpei Koshima

0 Kenneth Du over 5 years ago

1. Please refer to:
e2e.ti.com/.../233964

2. VLDO should have 1uF to GND.

0 user5762398 over 5 years ago in reply to Kenneth Du

Hi Kenneth.

Thanks for your answer.

When using the manual mode, are there any problems with the S1-IN / S2-IN pins connected to GND?

I look forward to hearing from you.

Syunpei Koshima

0 user5762398 over 5 years ago in reply to user5762398

Hi Kenneth.

The answer to the question I sent last time has not yet arrived, how is the situation?

>When using the manual mode, are there any problems with the S1-IN / S2-IN pins connected to GND?

I look forward to hearing from you.

Syunpei Koshima

0 Kenneth Du over 5 years ago in reply to user5762398

Yes, you can.

Power management forum