SLUSFL8 May   2024 LMR51406 , LMR51410

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison Table
  6. 5 Pin Configuration and Functions
  7. 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 System Characteristics
    7. 6.7 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Fixed Frequency Peak Current Mode Control
      2. 7.3.2 Adjustable Output Voltage
      3. 7.3.3 Enable
      4. 7.3.4 Minimum ON Time, Minimum OFF Time, and Frequency Foldback
      5. 7.3.5 Bootstrap Voltage
      6. 7.3.6 Overcurrent and Short-Circuit Protection
      7. 7.3.7 Soft Start
      8. 7.3.8 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 Shutdown Mode
      2. 7.4.2 Active Mode
      3. 7.4.3 CCM Mode
      4. 7.4.4 Light Load Operation (PFM Version)
      5. 7.4.5 Light-Load Operation (FPWM Version)
  9. 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 Custom Design With WEBENCH® Tools
        2. 8.2.2.2 Output Voltage Setpoint
        3. 8.2.2.3 Switching Frequency
        4. 8.2.2.4 Inductor Selection
        5. 8.2.2.5 Output Capacitor Selection
        6. 8.2.2.6 Input Capacitor Selection
        7. 8.2.2.7 Bootstrap Capacitor
        8. 8.2.2.8 Undervoltage Lockout Setpoint
        9. 8.2.2.9 Replacing Non Sync Buck Converter
      3. 8.2.3 Application Curves
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
        1. 8.4.1.1 Compact Layout for EMI Reduction
        2. 8.4.1.2 Feedback Resistors
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Device Support
      1. 9.1.1 Third-Party Products Disclaimer
      2. 9.1.2 Development Support
        1. 9.1.2.1 Custom Design With WEBENCH® Tools
    2. 9.2 Documentation Support
      1. 9.2.1 Related Documentation
    3. 9.3 Receiving Notification of Documentation Updates
    4. 9.4 Support Resources
    5. 9.5 Trademarks
    6. 9.6 Electrostatic Discharge Caution
    7. 9.7 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

Package Options

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

6.7 Typical Characteristics

VIN = 24V, fSW= 400kHz, TA = 25°C, unless otherwise specified

LMR51406 LMR51410 3.3V Efficiency Versus Load Current
fSW = 400kHzVOUT = 3.3VLMR51410X
Figure 6-1 3.3V Efficiency Versus Load Current
LMR51406 LMR51410 12V Efficiency Versus Load Current
fSW = 400kHzVOUT = 12VLMR51410X
Figure 6-3 12V Efficiency Versus Load Current
LMR51406 LMR51410 5V Efficiency Versus Load Current
fSW = 1MHzVOUT = 5VLMR51410Y
Figure 6-5 5V Efficiency Versus Load Current
LMR51406 LMR51410 5V load Regulation
fsw = 400kHzVOUT = 5VLMR51410X
Figure 6-7 5V load Regulation
LMR51406 LMR51410 VIN Quiescent Current Versus TemperatureFigure 6-9 VIN Quiescent Current Versus Temperature
LMR51406 LMR51410 Reference Voltage Versus TemperatureFigure 6-11 Reference Voltage Versus Temperature
LMR51406 LMR51410 5V Efficiency Versus Load Current
fSW = 400kHzVOUT = 5VLMR51410X
Figure 6-2 5V Efficiency Versus Load Current
LMR51406 LMR51410 3.3V Efficiency Versus Load Current
fSW = 1.1MHzVOUT = 3.3VLMR51410Y
Figure 6-4 3.3V Efficiency Versus Load Current
LMR51406 LMR51410 12V Efficiency Versus Load Current
fSW = 1MHzVOUT = 12VLMR51410Y
Figure 6-6 12V Efficiency Versus Load Current
LMR51406 LMR51410 3.3V Load Regulation
fSW = 400kHzVOUT = 3.3VLMR51410X
Figure 6-8 3.3V Load Regulation
LMR51406 LMR51410 VIN UVLO Versus TemperatureFigure 6-10 VIN UVLO Versus Temperature
LMR51406 LMR51410 HS and LS Current Limit Versus TemperatureFigure 6-12 HS and LS Current Limit Versus Temperature