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soft-start in SC charge pump regulator

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schwang1970

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1 Did anyone know that the SC charge pump need a soft start circuit?
2 What is the purpose of soft start circuit?
Thank you!
 

schwang1970 said:
1 Did anyone know that the SC charge pump need a soft start circuit?
2 What is the purpose of soft start circuit?
Thank you!
Click to expand...

1.
I think that we do not need soft start circuit in charge pump circuit.
beacuse the flying cap is so small, in charge phase the inrush is so samll.
Note:Charge phase :the VIn charge flying cap.
Discharge Phase :Flying Cap discharge to Vo.


2.
The Soft Start purpose.
1.reduce vin inrush current.
2.smooth vout waveform.
 

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