SNVA991A October   2022  – October 2025 LM5123-Q1

1.   1
2.   How to Design a Boost Converter Using LM5123
3.   Trademarks
4. 1Design Example
5. 2Calculations and Component Selection
   1. 2.1  Switching Frequency
   2. 2.2  Initial Inductor Calculation
   3. 2.3  Current Sense Resistor Selection
   4. 2.4  Inductor Selection
   5. 2.5  Output Capacitor Selection
   6. 2.6  Input Capacitor Selection
   7. 2.7  Feedback Resistor Selection
   8. 2.8  UVLO Resistor Selection
   9. 2.9  Soft-Start Capacitor Selection
   10. 2.10 Control Loop Compensation
       1. 2.10.1 Crossover Frequency (fcross) Selection
       2. 2.10.2 RCOMP Selection
       3. 2.10.3 CCOMP Selection
       4. 2.10.4 CHF Selection
   11. 2.11 MOSFET selection
6. 3Implementation Results
7. 4Small Signal Frequency Modeling
   1. 4.1 Boost Regulator Modulator Modeling
   2. 4.2 Compensation Modeling
   3. 4.3 Open Loop Modeling
8. 5Resources
9. 6Revision History