ZHCS048A June 2011 – July 2022 TPS54325-Q1
PRODUCTION DATA
The inductance value is selected to provide approximately 30% peak-to-peak ripple current at maximum load. Larger ripple current increases output ripple voltage, improves S/N ratio, and contributes to stable operation. Smaller ripple currents result in lower output voltage ripple. When using low-ESR output capacitors, output ripple voltage is usually low, so larger ripple currents are acceptable. The coefficient Kind represents the percentage of ripple current. The value of Kind must not be greater than 0.4. Use 0.3 when using low-ESR output capacitors. Equation 2 can be used to calculate L1. Use 700 kHz for fSW. Make sure the chosen inductor is rated for the peak current of Equation 4 and the RMS current of Equation 5.