PCB Voltage Drop Calculator
Calculate voltage drop across PCB traces
Input Parameters
For percentage calculation
Results
Voltage Drop
97.56mV(2.96%)
Trace Resistance
97.563 mΩ
Power Loss
97.56 mW
Guidelines
- Keep voltage drop below 5% of supply
- Use wider traces for power rails
- Consider copper pours for high current
Understanding PCB Voltage Drop
Why Voltage Drop Matters
Voltage drop across PCB traces reduces the voltage available to components. For sensitive circuits, excessive voltage drop can cause malfunction. Power supply rails are particularly critical - a 5% drop on a 3.3V rail means 165mV less voltage reaching the component.
Minimizing Voltage Drop
Use wider traces, thicker copper, or shorter routing paths. For power distribution, consider copper pours or power planes. Place decoupling capacitors close to ICs to compensate for trace impedance.