TLV62130: Output voltage at light load

Dice,

The output voltage should be slightly higher at light load due to the Power Save Mode operation.  3.6 V seems excessive though.  Can you provide waveforms showing Vout and SW for both conditions?

Hi John,
Thank you for your reply.

I attach the waveforms.

TLV62130RGTT_waveform.pdf

“01.” is the state that 3.3V is supplied to IC such as logic IC and ADC.
It is not completely unloaded.

Do you know the cause of 3.6V output?

Best regards,
Dice-K

Hi John,

Does large Cout Cause Problems?

Do you think the following method is effective?

  Reduce Cout.
  Change to TLV62130A and use output discharge function.

Best regards,
Dice-K

Hi John,

Removing 100uF of Cout and adding 0.1uF of Cin had no effect.

I saw the waveforms of 3.3V and SW when the power was turned on.
It seems that the voltage has risen since switching stopped halfway.

TLV62130RGTT_waveform2.pdf

Do you know what the cause is?

Best regards,
Dice-K

Dice,

In the case where the output goes to 3.6 V, does it always recover after some time?

Hi John,

The cause of 3.6V was found.
The voltage of the IC on the load side was sneaking into Vout.

I apologize for the inconvenience.

Best regards,
Dice-K