SNVSC77 December   2024 LM5125-Q1

ADVANCE INFORMATION  

1.   1
2. 1 Features
3. 2 Applications
4. 3 Description
5. 4 Pin Configuration and Functions
6. 5 Specifications
   1. 5.1 Absolute Maximum Ratings
   2. 5.2 ESD Ratings
   3. 5.3 Recommended Operating Conditions
   4. 5.4 Thermal Information
   5. 5.5 Electrical Characteristics
   6. 5.6 Timing Requirements
7. 6 Detailed Description
   1. 6.1 Overview
   2. 6.2 Functional Block Diagram
   3. 6.3 Feature Description
      1. 6.3.1  Device Configuration (CFG0-pin, CFG1-pin, CFG2-pin)
      2. 6.3.2  Switching Frequency and Synchronization (SYNCIN)
      3. 6.3.3  Dual Random Spread Spectrum (DRSS)
      4. 6.3.4  Operation Modes (BYPASS, DEM, FPWM)
      5. 6.3.5  Dual- and Multi-phase Operation
      6. 6.3.6  BIAS (BIAS-pin)
      7. 6.3.7  Soft Start (SS-pin)
      8. 6.3.8  VOUT Programming (VOUT, ATRK, DTRK)
      9. 6.3.9  Protections
      10. 6.3.10 VOUT Overvoltage Protection (OVP)
      11. 6.3.11 Thermal Shutdown (TSD)
      12. 6.3.12 Power-Good Indicator (PGOOD-pin)
      13. 6.3.13 Current Sensing, Peak Current Limit, and Slope Compensation (CSP1, CSP2, CSN1, CSN2)
      14. 6.3.14 Current Sense Programming (CSP1, CSP2, CSN1, CSN2)
      15. 6.3.15 Input Current Limit and Monitoring (ILIM, IMON, DLY)
      16. 6.3.16 Signal Deglitch Overview
      17. 6.3.17 MOSFET Drivers, Integrated Boot Diode, and Hiccup Mode Fault Protection (LOx, HOx, HBx-pin)
   4. 6.4 Device Functional Modes
      1. 6.4.1 Shutdown State
8. 7 Application and Implementation
   1. 7.1 Application Information
      1. 7.1.1 Feedback Compensation
   2. 7.2 Typical Application
      1. 7.2.1 Application
      2. 7.2.2 Design Requirements
      3. 7.2.3 Detailed Design Procedure
         1. 7.2.3.1  Determine the Total Phase Number
         2. 7.2.3.2  Determining the Duty Cycle
         3. 7.2.3.3  Timing Resistor RT
         4. 7.2.3.4  Inductor Selection Lm
         5. 7.2.3.5  Current Sense Resistor Rcs
         6. 7.2.3.6  Current Sense Filter RCSFP, RCSFN, CCS
         7. 7.2.3.7  Low-Side Power Switch QL
         8. 7.2.3.8  High-Side Power Switch QH and Additional Parallel Schottky Diode
         9. 7.2.3.9  Snubber Components
         10. 7.2.3.10 Vout Programming
         11. 7.2.3.11 Input Current Limit (ILIM/IMON)
         12. 7.2.3.12 UVLO Divider
         13. 7.2.3.13 Soft Start
         14. 7.2.3.14 CFG Settings
         15. 7.2.3.15 Output Capacitor Cout
         16. 7.2.3.16 Input Capacitor Cin
         17. 7.2.3.17 Bootstrap Capacitor
         18. 7.2.3.18 VCC Capacitor CVCC
         19. 7.2.3.19 BIAS Capacitor
         20. 7.2.3.20 VOUT Capacitor
         21. 7.2.3.21 Loop Compensation
      4. 7.2.4 Application Curves
         1. 7.2.4.1 Efficiency
         2. 7.2.4.2 Steady State Waveforms
         3. 7.2.4.3 Step Load Response
         4. 7.2.4.4 Sync Operation
         5. 7.2.4.5 Thermal Performance
   3. 7.3 Power Supply Recommendations
   4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
9. 8 Device and Documentation Support
   1. 8.1 Documentation Support
      1. 8.1.1 Related Documentation
   2. 8.2 Receiving Notification of Documentation Updates
   3. 8.3 Support Resources
   4. 8.4 Trademarks
   5. 8.5 Electrostatic Discharge Caution
   6. 8.6 Glossary
10. 9 Revision History
11. 10Mechanical, Packaging, and Orderable Information
    1. 10.1 Tape and Reel Information
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