SNVSA67B December   2016  – June 2017 LM5166

PRODUCTION DATA.  

1. 1 Features
2. 2 Applications
3. 3 Description
4. 4 Revision History
5. 5 Pin Configuration and Functions
6. 6 Specifications
   1. 6.1 Absolute Maximum Ratings
   2. 6.2 ESD Ratings
   3. 6.3 Recommended Operating Conditions
   4. 6.4 Thermal Information
   5. 6.5 Electrical Characteristics
   6. 6.6 Switching Characteristics
   7. 6.7 Typical Characteristics
7. 7 Detailed Description
   1. 7.1 Overview
   2. 7.2 Functional Block Diagram
   3. 7.3 Feature Description
      1. 7.3.1  Integrated Power MOSFETs
      2. 7.3.2  Selectable PFM or COT Mode Converter Operation
         1. 7.3.2.1 PFM Mode Operation
         2. 7.3.2.2 COT Mode Operation
            1. 7.3.2.2.1 Ripple Generation Methods
            2. 7.3.2.2.2 COT Mode Light-Load Operation
      3. 7.3.3  Low Dropout Operation and 100% Duty Cycle Mode
      4. 7.3.4  Adjustable Output Voltage (FB)
      5. 7.3.5  Adjustable Current Limit
      6. 7.3.6  Precision Enable (EN) and Hysteresis (HYS)
      7. 7.3.7  Power Good (PGOOD)
      8. 7.3.8  Configurable Soft Start (SS)
      9. 7.3.9  Short-Circuit Operation
      10. 7.3.10 Thermal Shutdown
   4. 7.4 Device Functional Modes
      1. 7.4.1 Shutdown Mode
      2. 7.4.2 Standby Mode
      3. 7.4.3 Active Mode - COT
      4. 7.4.4 Sleep Mode - COT
      5. 7.4.5 Active Mode - PFM
      6. 7.4.6 Sleep Mode - PFM
8. 8 Applications and Implementation
   1. 8.1 Application Information
   2. 8.2 Typical Applications
      1. 8.2.1 Design 1: Wide VIN, Low IQ, High-Efficiency COT Converter Rated at 5 V, 500 mA
         1. 8.2.1.1 Design Requirements
         2. 8.2.1.2 Detailed Design Procedure
            1. 8.2.1.2.1 Custom Design With WEBENCH® Tools
            2. 8.2.1.2.2 Feedback Resistors - RFB1, RFB2
            3. 8.2.1.2.3 Switching Frequency - RT
            4. 8.2.1.2.4 Filter Inductance - LF
            5. 8.2.1.2.5 Output Capacitors - COUT
            6. 8.2.1.2.6 Ripple Generation Network - RESR, CFF
            7. 8.2.1.2.7 Input Capacitor - CIN
            8. 8.2.1.2.8 Soft-Start Capacitor - CSS
            9. 8.2.1.2.9 Application Curves
      2. 8.2.2 Design 2: Wide VIN, Low IQ COT Converter Rated at 3.3 V, 500 mA
         1. 8.2.2.1 Design Requirements
         2. 8.2.2.2 Detailed Design Procedure
            1. 8.2.2.2.1 Feedback Resistors - RFB1, RFB2
            2. 8.2.2.2.2 Switching Frequency - RT
            3. 8.2.2.2.3 Filter Inductance - LF
            4. 8.2.2.2.4 Output Capacitors - COUT
            5. 8.2.2.2.5 Ripple Generation Network - RESR
            6. 8.2.2.2.6 Input Capacitor - CIN
            7. 8.2.2.2.7 Soft-Start Capacitor - CSS
            8. 8.2.2.2.8 Application Curves
      3. 8.2.3 Design 3: High-Density PFM Converter Rated at 3.3 V, 0.3 A
         1. 8.2.3.1 Design Requirements
         2. 8.2.3.2 Detailed Design Procedure
            1. 8.2.3.2.1 Peak Current Limit Setting - RILIM
            2. 8.2.3.2.2 Switching Frequency - LF
            3. 8.2.3.2.3 Output Capacitors - COUT
            4. 8.2.3.2.4 Input Capacitor - CIN
            5. 8.2.3.2.5 Application Curves
      4. 8.2.4 Design 4: Wide VIN, Low IQ PFM Converter Rated at 5 V, 500 mA
         1. 8.2.4.1 Design Requirements
         2. 8.2.4.2 Detailed Design Procedure
            1. 8.2.4.2.1 Feedback Resistors - RFB1, RFB2
            2. 8.2.4.2.2 Peak Current Limit Setting - RILIM
            3. 8.2.4.2.3 Switching Frequency - LF
            4. 8.2.4.2.4 Output Capacitors - COUT
            5. 8.2.4.2.5 Input Capacitor - CIN
         3. 8.2.4.3 Application Curves
      5. 8.2.5 Design 5: 12-V, 300-mA COT Converter Operating From 24-V or 48-V Input
         1. 8.2.5.1 Design Requirements
         2. 8.2.5.2 Detailed Design Procedure
            1. 8.2.5.2.1 Peak Current Limit Setting - RILIM
            2. 8.2.5.2.2 Switching Frequency - RRT
            3. 8.2.5.2.3 Inductor - LF
            4. 8.2.5.2.4 Input and Output Capacitors - CIN, COUT
            5. 8.2.5.2.5 Feedback Resistors - RFB1, RFB2
            6. 8.2.5.2.6 Ripple Generation Network - RA, CA, CB
            7. 8.2.5.2.7 Undervoltage Lockout Setpoint - RUV1, RUV2, RHYS
            8. 8.2.5.2.8 Soft Start - CSS
         3. 8.2.5.3 Application Curves
9. 9 Power Supply Recommendations
10. 10Layout
    1. 10.1 Layout Guidelines
       1. 10.1.1 Compact PCB Layout for EMI Reduction
       2. 10.1.2 Feedback Resistors
    2. 10.2 Layout Example
11. 11Device and Documentation Support
    1. 11.1 Device Support
       1. 11.1.1 Third-Party Products Disclaimer
       2. 11.1.2 Development Support
       3. 11.1.3 Custom Design With WEBENCH® Tools
    2. 11.2 Documentation Support
       1. 11.2.1 Related Documentation
    3. 11.3 Receiving Notification of Documentation Updates
    4. 11.4 Community Resources
    5. 11.5 Trademarks
    6. 11.6 Electrostatic Discharge Caution
    7. 11.7 Glossary
12. 12Mechanical, Packaging, and Orderable Information