Ground Bounce Calculator
Analyze SSO/SSN induced ground bounce
Input Parameters
IC Package
O
O
O
O
O
O
O
O
GND
GND
Llead = 5 nH/pin
Analysis Results
safe
400 mV
Ground bounce is within safe limits. No issues expected.
Bounce vs Vcc
12.1%
di/dt
160.0 MA/s
Effective Inductance
2.50 nH
Noise Margin (Low)
990 mV
Total Switch Current
160 mA
Recommended GND Pins
3
Vbounce = Leff × (N × Iout) / tr. Lower inductance or slower edges reduce bounce.
Package Inductance
QFP/TQFP5-8 nH
BGA1-3 nH
QFN0.5-2 nH
Flip-Chip0.1-0.5 nH
Mitigation Strategies
- • Use more ground pins
- • Slow down edge rates
- • Stagger switching times
- • Use low-inductance packages
- • Add decoupling capacitors
- • Separate quiet/noisy grounds