Other Parts Discussed in Thread: TPS61230
Hi,
I am creating an attached circuit and checking the operation.
The output capacitor C459(2.2uF) is a ceramic capacitor and C460(47uF) is a tantalum capacitor.
The operation is good, but since the tantalum capacitor is expensive, I would like to use a different capacitor.
Previously I was told that another thread, output capacitor can use a combination of ceramic capacitor and low resistance.
Therefore, I connected the 47μF ceramic capacitor and 100mΩ resistor in series and confirmed the operation.
Measured waveforms are shown below. Measurement was performed when the output current was changed from 20mA to 350mA.
The green waveform is the output voltage.
The output voltage seems to oscillate immediately after changing the output current.
Is this oscillation normal?
Is there a way to improve if it is not normal?
(Change part of output capacitor)
Low resistance : SR732ATTDR100F / KOA
Ceramic capacitor : GRM21BR61A476ME15L / MURATA
Best Regards,
