Hi,
In my application I am using a 20mF supercapacitor to supply unregulated power to the TPS610995. The latter supplies ~3.6V to some integrated circuits but the real load is an IoT module which has a 470uF capacitor at the input of its power rail. A reset circuitry keeps the boost converter disabled until about 1.46V. Most of the time the system powers up fine but sometimes it goes into this weird state. I have some scope waveforms to share regarding the problem. I feel the design could be made more reliable by limiting the inrush current that the TPS610995 is drawing from the 20mF supercapacitor.
Can you help? Load switches tend to have a non-negligible quiescent current which can undermine this energy harvesting application. Can I use a ferrite bead at the input of the converter? Would you be able to suggest an alternative part number? This is a very low power application with an input voltage range of 0.5V to 5V. I selected the TPS610995 because of its very low Iq.
Thank you,
Chundra
