SNVS031M april   2000  – may 2023 LM2676

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: LM2676 – 3.3 V
    6. 6.6  Electrical Characteristics: LM2676 – 5 V
    7. 6.7  Electrical Characteristics: LM2676 – 12 B
    8. 6.8  Electrical Characteristics: LM2676 – Adjustable
    9. 6.9  Electrical Characteristics – All Output Voltage Versions
    10. 6.10 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 Switch Output
      2. 7.3.2 Input
      3. 7.3.3 C Boost
      4. 7.3.4 Ground
      5. 7.3.5 Feedback
      6. 7.3.6 ON/OFF
    4. 7.4 Device Functional Modes
      1. 7.4.1 Shutdown Mode
      2. 7.4.2 Active Mode
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Design Considerations
      2. 8.1.2 Inductor
      3. 8.1.3 Output Capacitor
      4. 8.1.4 Input Capacitor
      5. 8.1.5 Catch Diode
      6. 8.1.6 Boost Capacitor
      7. 8.1.7 Additional Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 Typical Application for All Output Voltage Versions
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1 Capacitor Selection Guides
          2. 8.2.1.2.2 Inductor Selection Guides
      2. 8.2.2 Application Curves
      3. 8.2.3 Fixed Output Voltage Application
        1. 8.2.3.1 Design Requirements
        2. 8.2.3.2 Detailed Design Procedure
          1. 8.2.3.2.1 Capacitor Selection
      4. 8.2.4 Adjustable Output Voltage Application
        1. 8.2.4.1 Design Requirements
        2. 8.2.4.2 Detailed Design Procedure
          1. 8.2.4.2.1 Capacitor Selection
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  9. 9 Device and Documentation Support
    1. 9.1 Documentation Support
      1. 9.1.1 Related Documentation
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  10. 10Mechanical, Packaging, and Orderable Information
    1. 10.1 DAP (VSON Package)

Package Options

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

6.10 Typical Characteristics

GUID-DA1878C0-EBDE-4149-9BD0-85742F6FB1D8-low.pngFigure 6-1 Normalized Output Voltage
GUID-1ED70F45-0F7C-43E5-8ABD-96CE1F2C5408-low.pngFigure 6-3 Efficiency versus Input Voltage
GUID-7C4BAA2C-40AE-4E73-9076-19E63EE76AE4-low.pngFigure 6-5 Switch Current Limit
GUID-E482B4E7-A939-4B12-B367-6818F7D0CA60-low.pngFigure 6-7 Standby Quiescent Current
GUID-23C6D7C9-80D9-41AF-9ACF-4EF6DE93685B-low.pngFigure 6-9 ON/ OFF Pin Current (Sourcing)
GUID-A3D6A518-93DC-437A-A18F-9DCE0A0969C5-low.png
Figure 6-11 Feedback Pin Bias Current
GUID-3D70ED98-E6BE-4B60-83D9-8F462527DC07-low.png
Discontinuous Mode Switching Waveforms VIN = 20 V, VOUT = 5 V, ILOAD = 500 mA L = 10 µH, COUT = 400 µF, COUTESR = 13 mΩ
A: VSW Pin Voltage, 10 V/div.
B: Inductor Current, 1 A/div
C: Output Ripple Voltage, 20 mV/div AC-Coupled
Figure 6-13 Horizontal Time Base: 1 µs/div
GUID-B6AA216E-4BFC-46F5-A8EC-18061921DB9A-low.png
Load Transient Response for Discontinuous Mode VIN = 20 V, VOUT = 5 V, L = 10 µH, COUT = 400 µF, COUTESR = 13 mΩ
A: Output Voltage, 100 mV/div, AC-Coupled
B: Load Current: 200-mA to 3-A Load Pulse
Figure 6-15 Horizontal Time Base: 200 µs/div
GUID-C0C71B75-1119-4C11-88AE-56DF2F39EE67-low.pngFigure 6-2 Line Regulation
GUID-F4FF5762-B696-441B-9B7E-242FE504EECA-low.pngFigure 6-4 Efficiency versus ILOAD
GUID-ACDA1AC0-5E43-43C8-90AC-E8DE4DE3CC73-low.pngFigure 6-6 Operating Quiescent Current
GUID-98E09850-05CF-4125-BF8D-82B136557510-low.pngFigure 6-8 ON/OFF Threshold Voltage
GUID-C7F32CB7-9C91-4155-AF39-50F0536C6288-low.pngFigure 6-10 Switching Frequency
GUID-CF75C78F-7EC6-4E51-BDEF-C38D80B70AA3-low.png
Continuous Mode Switching Waveforms VIN = 20 V, VOUT = 5 V, ILOAD = 3 A L = 33 µH, COUT = 200 µF, COUTESR = 26 mΩ
A: VSW Pin Voltage, 10 V/div.
B: Inductor Current, 1 A/div
C: Output Ripple Voltage, 20 mV/div AC-Coupled
Figure 6-12 Horizontal Time Base: 1 µs/div
GUID-E0B8DDDE-8141-42C3-9AC0-4DD5F7DC65D5-low.png
Load Transient Response for Continuous Mode VIN = 20 V, VOUT = 5 V L = 33 µH, COUT = 200 µF, COUTESR = 26 mΩ
A: Output Voltage, 100 mV//div, AC-Coupled.
B: Load Current: 500-mA to 3-A Load Pulse
Figure 6-14 Horizontal Time Base: 100 µs/div