Jaycar 2200µF 25VDC Low ESR Electrolytic Capacitor – 2743mA Ripple, Radial Lead

You need more bulk capacitance in the filter stage and you need it to hold up at temperature. This Jaycar 2200µF at 25VDC pushes 2743 mA rms of ripple at 105°C, 100 kHz. Impedance drops to 0.022Ω max (20°C, 100 kHz), so your supply sags less under transient loads. DC leakage is low, and the part is rated for 2,000 to 4,000 hours at 105°C. Solder it in, power up, and that brownout flicker on your board is gone

• 2200µF capacitance rated at 25VDC
• Ripple current: 2743 mA rms at 105°C, 100 kHz
• Impedance: 0.022Ω max at 20°C, 100 kHz
• Low DC leakage current for stable operation and reduced self-heating
• Rated life: 2,000–4,000 hours at 105°C under load
• Radial leads on standard pitch for through-hole mounting