SNVS085Y July   2000  – January 2026 LM3478

PRODUCTION DATA  

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 Typical Characteristics
7. 6 Detailed Description
   1. 6.1 Overview
   2. 6.2 Functional Block Diagram
   3. 6.3 Feature Description
      1. 6.3.1 Overvoltage Protection
      2. 6.3.2 Slope Compensation Ramp
      3. 6.3.3 Frequency Adjust/Shutdown
      4. 6.3.4 Short-Circuit Protection
   4. 6.4 Device Functional Modes
8. 7 Application and Implementation
   1. 7.1 Application Information
   2. 7.2 Typical Applications
      1. 7.2.1 Typical High Efficiency Step-Up (Boost) Converter
         1. 7.2.1.1 Design Requirements
         2. 7.2.1.2 Detailed Design Procedure
            1. 7.2.1.2.1  Custom Design with WEBENCH Tools
            2. 7.2.1.2.2  Power Inductor Selection
            3. 7.2.1.2.3  Programming the Output Voltage
            4. 7.2.1.2.4  Setting the Current Limit
            5. 7.2.1.2.5  Current Limit with External Slope Compensation
            6. 7.2.1.2.6  Power Diode Selection
            7. 7.2.1.2.7  Power MOSFET Selection
            8. 7.2.1.2.8  Input Capacitor Selection
            9. 7.2.1.2.9  Output Capacitor Selection
            10. 7.2.1.2.10 Compensation
         3. 7.2.1.3 Application Curves
      2. 7.2.2 Typical SEPIC Converter
         1. 7.2.2.1 Design Requirements
         2. 7.2.2.2 Detailed Design Procedure
            1. 7.2.2.2.1 Power MOSFET Selection
            2. 7.2.2.2.2 Power Diode Selection
            3. 7.2.2.2.3 Selection of Inductors L1 and L2
            4. 7.2.2.2.4 Sense Resistor Selection
            5. 7.2.2.2.5 Sepic Capacitor Selection
            6. 7.2.2.2.6 Input Capacitor Selection
            7. 7.2.2.2.7 Output Capacitor Selection
         3. 7.2.2.3 Application Curves
   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 Third-Party Products Disclaimer
   2. 8.2 Custom Design with WEBENCH Tools
   3. 8.3 Receiving Notification of Documentation Updates
   4. 8.4 Documentation Support
      1. 8.4.1 Related Documentation
   5. 8.5 Support Resources
   6. 8.6 Trademarks
   7. 8.7 Electrostatic Discharge Caution
   8. 8.8 Glossary
10. 9 Revision History
11. 10Mechanical, Packaging, and Orderable Information