SLUSF82 January   2024 LMG3100R017

ADVANCE INFORMATION  

  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
  7. 6 Typical Characteristics
  8. 7 Parameter Measurement Information
    1. 7.1 Propagation Delay and Mismatch Measurement
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Control Inputs
      2. 8.3.2 Start-up and UVLO
      3. 8.3.3 Bootstrap Supply Voltage Clamping
      4. 8.3.4 Level Shift
    4. 8.4 Device Functional Modes
  10.   Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 VCC Bypass Capacitor
        2. 9.2.2.2 Bootstrap Capacitor
        3. 9.2.2.3 Slew Rate Control
        4. 9.2.2.4 Use With Analog Controllers
        5. 9.2.2.5 Power Dissipation
    3.     Power Supply Recommendations
    4. 9.3 Layout
      1. 9.3.1 Layout Guidelines
      2. 9.3.2 Layout Examples
  11. 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
  12. 10Revision History
  13. 11Mechanical, Packaging, and Orderable Information
    1. 11.1 Package Information
    2. 11.2 Tape and Reel Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • VBE|15
Thermal pad, mechanical data (Package|Pins)
Orderable Information

9.2.1 Design Requirements

When designing a synchronous buck converter application that incorporates the LMG3100 power stage, some design considerations must be evaluated first to make the most appropriate selection. Among these considerations are the input voltages, passive components, operating frequency, and controller selection.Table 9-1 shows some sample values for a typical application. See Section 9.3, Section 9.3, and Section 9.2.2.5 for other key design considerations for the LMG3100.

Table 9-1 Design Parameters
PARAMETERSAMPLE VALUE
Half-bridge input supply voltage, VIN48 V
Output voltage, VOUT12 V
Output current8 A
VHB-HS bootstrap capacitor0.3 uF, X5R
Switching frequency1 MHz
Dead time8 ns
Inductor4.7 µH
ControllerLM5148