Tool/software:
1. According to the component values calculated by TI design tools, the output capacitor only requires one low ESR MLCC capacitor (with a capacity of 4.7uF), but the ripple voltage of the actual circuit is very high, and the inductance has obvious high-frequency noise (the ripple is close to 0.3A when the electronic load is 0.3A)
800mV， Our company has verified that connecting two low ESR capacitors in parallel at the original output capacitor can suppress ripple within 200mV, but there is still significant high-frequency noise in the inductor when loaded.
2. The electronic load increases from 0 to 500mA in increments of every 10mA, and the ripple will suddenly increase exponentially near the load of 190mA or 270mA (A. Adding a 1000PF or 470PF feedback resistor can solve the high-frequency noise of the inductor); B、 Output terminal
Increasing the capacitance of the capacitor connected in series to the feedback end can also solve the high-frequency noise of the inductor, but the sudden exponential increase in ripple near the load of 190mA or 270mA can alleviate it but cannot completely solve it.
