SNVSAA5B February   2015  – December 2024 LMR14020

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 Switching Characteristics
    7. 5.7 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  Fixed Frequency Peak Current Mode Control
      2. 6.3.2  Slope Compensation
      3. 6.3.3  Sleep Mode
      4. 6.3.4  Low Dropout Operation and Bootstrap Voltage (BOOT)
      5. 6.3.5  Adjustable Output Voltage
      6. 6.3.6  Enable and Adjustable Undervoltage Lockout
      7. 6.3.7  External Soft Start
      8. 6.3.8  Switching Frequency and Synchronization (RT/SYNC)
      9. 6.3.9  Overcurrent and Short-Circuit Protection
      10. 6.3.10 Overvoltage Protection
      11. 6.3.11 Thermal Shutdown
    4. 6.4 Device Functional Modes
      1. 6.4.1 Shutdown Mode
      2. 6.4.2 Active Mode
      3. 6.4.3 CCM Mode
      4. 6.4.4 Light Load Operation
  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 Output Voltage Set-Point
        2. 7.2.2.2 Switching Frequency
        3. 7.2.2.3 Output Inductor Selection
        4. 7.2.2.4 Output Capacitor Selection
        5. 7.2.2.5 Schottky Diode Selection
        6. 7.2.2.6 Input Capacitor Selection
        7. 7.2.2.7 Bootstrap Capacitor Selection
        8. 7.2.2.8 Soft-start Capacitor Selection
      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 Receiving Notification of Documentation Updates
    2. 8.2 Support Resources
    3. 8.3 Trademarks
    4. 8.4 Electrostatic Discharge Caution
    5. 8.5 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

Package Options

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

5.7 Typical Characteristics

Unless otherwise specified the following conditions apply: VIN = 12 V, fSW = 1 MHz, L = 5.5 µH, COUT = 47 µF, TA = 25°C.

LMR14020 Efficiency vs. Load Current
VOUT = 5 V fSW = 1 MHz
Figure 5-1 Efficiency vs. Load Current
LMR14020 Efficiency vs. Load Current
VOUT = 3.3 V fSW = 1 MHz
Figure 5-3 Efficiency vs. Load Current
LMR14020 Load Regulation
VOUT = 5 V fSW = 1 MHz
Figure 5-5 Load Regulation
LMR14020 Dropout Curve
VOUT = 5 V fSW = 1 MHz
Figure 5-7 Dropout Curve
LMR14020 Dropout Curve
VOUT = 3.3 V fSW = 1 MHz
Figure 5-9 Dropout Curve
LMR14020 Shut-down Current and Quiescent CurrentFigure 5-11 Shut-down Current and Quiescent Current
LMR14020 Efficiency vs. Load Current
VOUT = 5 V fSW = 2.2 MHz
Figure 5-2 Efficiency vs. Load Current
LMR14020 Efficiency vs. Load Current
VOUT = 3.3 V fSW = 2.2 MHz
Figure 5-4 Efficiency vs. Load Current
LMR14020 Frequency vs VFBFigure 5-6 Frequency vs VFB
LMR14020 Dropout Curve
VOUT = 5V fSW = 2.2 MHz
Figure 5-8 Dropout Curve
LMR14020 Dropout Curve
VOUT = 3.3 V fSW = 2.2 MHz
Figure 5-10 Dropout Curve
LMR14020 UVLO Threshold
IOUT = 0 A
Figure 5-12 UVLO Threshold