SNVS961F April   2013  – October 2026 LM5023

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 Detailed Pin Description
        1. 6.3.1.1 QR Pin
        2. 6.3.1.2 VSD Pin
        3. 6.3.1.3 SS Pin
        4. 6.3.1.4 COMP Pin
        5. 6.3.1.5 CS Pin
        6. 6.3.1.6 GND Pin
        7. 6.3.1.7 OUT Pin
        8. 6.3.1.8 VCC Pin
      2. 6.3.2 Start-Up
      3. 6.3.3 Quasi-Resonant Operation
      4. 6.3.4 Quasi-Resonant Operating Frequency
      5. 6.3.5 PWM Comparator
      6. 6.3.6 Soft-Start
      7. 6.3.7 Gate Driver
        1. 6.3.7.1 Skip-Cycle Operation
      8. 6.3.8 Current Limit and Current Sense
    4. 6.4 Device Functional Modes
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
        1. 7.2.2.1 Custom Design With WEBENCH® Tools
        2. 7.2.2.2 Line Current-Limit Feedforward
          1. 7.2.2.2.1 Overvoltage Protection
        3. 7.2.2.3 Valley Switching
        4. 7.2.2.4 Hiccup Mode
      3. 7.2.3 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 Device Support
      1. 8.1.1 Development Support
        1. 8.1.1.1 Custom Design With WEBENCH® Tools
    2. 8.2 Documentation Support
      1. 8.2.1 Related Documentation
    3. 8.3 Receiving Notification of Documentation Updates
    4. 8.4 Community Resources
    5. 8.5 Trademarks
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

Package Options

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

6.3.1.4 COMP Pin

The COMP pin is the input to the pulse width modulator, and skip cycle comparators. There is an internal pull up resistance of 42kΩ on the COMP pin. Traces from the optocoupler to the COMP pin must have minimal loop area. It is recommended to shield the COMP trace with ground planes to minimize noise pick up. If a capacitor connects to COMP and GND, use short traces.