SNVS699H February   2011  – January 2015 LM5045

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 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  High-Voltage Start-Up Regulator
      2. 7.3.2  Line Undervoltage Detector
      3. 7.3.3  Overvoltage Protection
      4. 7.3.4  Reference
      5. 7.3.5  Oscillator, Sync Input
      6. 7.3.6  Cycle-by-Cycle Current Limit
      7. 7.3.7  Hiccup Mode
      8. 7.3.8  PWM Comparator
      9. 7.3.9  Ramp Pin
      10. 7.3.10 Slope Pin
      11. 7.3.11 Soft-Start
      12. 7.3.12 Gate Driver Outputs
      13. 7.3.13 Synchronous Rectifier Control Outputs (SR1 and SR2)
      14. 7.3.14 Soft-Start of the Synchronous Rectifiers
      15. 7.3.15 Prebias Startup
      16. 7.3.16 Soft-Stop
      17. 7.3.17 Soft-Stop Off
      18. 7.3.18 Thermal Protection
    4. 7.4 Device Functional Modes
      1. 7.4.1 Control Method Selection
      2. 7.4.2 Voltage Mode Control Using the LM5045
      3. 7.4.3 Current Mode Control Using the LM5045
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 VIN and VCC
        2. 8.2.2.2 For Applications With > 100 VIN
        3. 8.2.2.3 UVLO and OVP Voltage Divider Selection
        4. 8.2.2.4 Current Sense
        5. 8.2.2.5 Hiccup Mode Current Limit Restart
        6. 8.2.2.6 Augmenting the Gate Drive Strength
      3. 8.2.3 Application Curve
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Trademarks
    2. 11.2 Electrostatic Discharge Caution
    3. 11.3 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

11 Device and Documentation Support

11.1 Trademarks

PowerPAD is a trademark of Texas Instruments.

All other trademarks are the property of their respective owners.

11.2 Electrostatic Discharge Caution

esds-image

These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.

11.3 Glossary

SLYZ022 — TI Glossary.

This glossary lists and explains terms, acronyms, and definitions.