SNVS129G May   2004  – June 2025 LM2675

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
      1. 5.4.1 Electrical Characteristics – 3.3 V
    5. 5.5  Electrical Characteristics – 5 V
    6. 5.6  Electrical Characteristics – 12 V
    7. 5.7  Electrical Characteristics – Adjustable
    8. 5.8  Electrical Characteristics – All Output Voltage Versions
    9. 5.9  Typical Characteristics
    10. 5.10 Typical Characteristics – Fixed Output Voltage Versions
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Adjustable Output Voltage
    4. 6.4 Device Functional Modes
      1. 6.4.1 Shutdown Mode
      2. 6.4.2 Active Mode
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Fixed Output Voltage Application
        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 Inductor Selection (L1)
          3. 7.2.1.2.3 Output Capacitor Selection (COUT)
          4. 7.2.1.2.4 Catch Diode Selection (D1)
          5. 7.2.1.2.5 Input Capacitor (CIN)
          6. 7.2.1.2.6 Boost Capacitor (CB)
        3. 7.2.1.3 Application Curves
      2. 7.2.2 Adjustable Output Voltage Application
        1. 7.2.2.1 Design Requirements
        2. 7.2.2.2 Detailed Design Procedure
          1. 7.2.2.2.1 Programming Output Voltage
          2. 7.2.2.2.2 Inductor Selection (L1)
          3. 7.2.2.2.3 Output Capacitor SeIection (COUT)
          4. 7.2.2.2.4 Catch Diode Selection (D1)
          5. 7.2.2.2.5 Input Capacitor (CIN)
          6. 7.2.2.2.6 Boost Capacitor (CB)
        3. 7.2.2.3 Application Curve
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
        1. 7.4.1.1 WSON Package Devices
      2. 7.4.2 Layout Examples
  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 Support Resources
    5. 8.5 Trademarks
    6. 8.6 Electrostatic Discharge Caution
    7. 8.7 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

7.4.2 Layout Examples

LM2675 Typical Surface Mount PC Board Layout, Fixed Output
CIN = 15-μF, 50-V, Solid Tantalum Sprague 594D series
COUT = 68-μF, 16-V, Solid Tantalum Sprague 594D series
D1 = 1-A, 40-V Schottky Rectifier, surface mount
L1 = 33-μH, L23, Coilcraft DO3316
CB = 0.01-μF, 50-V ceramic
Figure 7-8 Typical Surface Mount PC Board Layout, Fixed Output
LM2675 Typical Surface Mount PC Board Layout, Adjustable Output
CIN = 15-μF, 50-V, Solid Tantalum Sprague 594D series
COUT = 33-μF, 25-V, Solid Tantalum Sprague 594D series
D1 = 1-A, 40-V Schottky Rectifier, surface mount
L1 = 68-μH, L30, Coilcraft DO3316
CB = 0.01-μF, 50-V ceramic
R1 = 1k, 1%
R2 = Use formula in Section 7.2.2.2
Figure 7-9 Typical Surface Mount PC Board Layout, Adjustable Output