❗ The Problem: Ripple, Noise & Load Response

An unstable SMPS output may show up as voltage ripple, sudden dips, or spikes when load changes. This instability can reset your microcontroller or cause faulty sensor readings.

🛠️ The Solution : Use Output Capacitors and Proper Filtering

To stabilize your SMPS output:

• Add low ESR electrolytic capacitors at the output

• Use ceramic capacitors for high-frequency noise

• Consider a ferrite bead or small inductor to filter spikes

🔌 Practical Example + Sample Calculation

Let’s say your SMPS outputs 5V and supplies 1A to a load.

If you see voltage ripple of 200mV (0.2V), that’s 4% deviation—not good for digital logic.

Using a 470µF cap and a ceramic 0.1µF cap together often reduces ripple to <50mV.

🛒 Product Suggestion: For Cleaner Power

💡 Low ESR Capacitors for output smoothing:

🔌 Ferrite Beads for noise suppression:

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