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Part Number: TPS51200
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In reply to Qian Chen:
Thank you for your reply.
Load current: DDR: 0.6 A
The current of VO was measured. There is inrush current as 2A. (Attachment)
For the capacitor of waveform 3, it is OK.
I have an additional question.
For details, please see the attached document.
In reply to Masazumi Ishii:
The VLDOIN current is equal to "Cout charging current" + "output current". The Cout charging current is the current charging Cout when Vout rises up.
In your measurement, the VLDOIN current is 2A, output current is 0.5A, and Cout Charging current is 1.5A.
Thank you for your answer.
The current of VTT is measured near VO pin of TPS51200. It is between electrolytic capacitor and Vo pin. I think that the charging current of capacitor + load current = 0.5 A (peak). (I think this state)
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