I have a battery pack at ~9VDC wired to a buck converter which steps down the voltage to 5VDC to power an electronic device.
The problem is that it sometimes supplies enough current on the device start-up to prevent the voltage from dropping too low and at other times it does not. Usually it does not, but the fact that it's fine sometimes makes me think I'm borderline on having enough power.
Is it possible to add a capacitor or other component somewhere into the layout in order to supply some additional current momentarily to get past the start-up peak draw at which point the current from the battery pack may be sufficient?
====EDIT Oct 15 2020====
For more details as requested:
- Here is the buck converter www.amazon.com/gp/product/B00Q48BRFO/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
- The battery pack is www.amazon.com/gp/product/B01N2INSBR/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 and I've tried with both freshly charged Eneloop batteries as well as brand new Energizer alkaline batteries.
- I'm powering a Raspberry Pi 4 (I understand it draws decent amperage, but I intend to use it mostly idle if I can just overcome boot up)