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

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

4 Revision History

Changes from A Revision (December 2016) to B Revision

  • Updated data sheet text to the latest TI documentation and translations standards Go
  • Changed the language of WEBENCH list item; added additional content and links for WEBENCH in data sheet Go
  • Added LM5166X and LM5166Y output versions to the data sheetGo
  • Replaced the body size (NOM) column with output versions in the Device Information tableGo
  • Changed the Typical COT Mode Application circuit to a fixed 5-V outputGo
  • Changed the EN absolute maximum voltage from (VVIN + 0.3 V) to 68 V Go
  • Deleted note 5 under the Absolute Maximum Ratings table Go
  • Changed the EN max operating voltage from VVIN to 65 V Go
  • Removed note 2 under the Recommended Operating ConditionsGo
  • Changed the IFB maximum from: 100 nA to: 25 nA Go
  • Added Figure 13 and Figure 14Go
  • Modified the Functional Block Diagram graphicGo
  • Changed RDSON1 to RDSON2 in Equation 3 Go
  • Updated Equation 12 Go
  • Added a link to TI Design TIDA-01395 to the Typical Applications sectionGo
  • Changed Design 3 to a 3.3-V fixed output, LM5166YGo
  • Added a new part number to CIN ref descriptionGo
  • Added a new part number to LF ref descriptionGo
  • Added the Design 5: 12-V, 300-mA COT Converter Operating from 24-V or 48-V Input section to Typical ApplicationsGo
  • Changed the PCB Layout and PCB Layout Guidelines section names to Layout and Layout GuidelinesGo
  • Added content to the Documentation Support sectionGo

Changes from * Revision (December 2016) to A Revision

  • Changed data sheet status from product preview to production dataGo