SNVSAG2B November   2015  – December 2024 LMR14050-Q1

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  Power Good (PGOOD)
      10. 6.3.10 Overcurrent and Short-Circuit Protection
      11. 6.3.11 Overvoltage Protection
      12. 6.3.12 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 Device Support
      1. 8.1.1 Third-Party Products Disclaimer
    2. 8.2 Documentation Support
      1. 8.2.1 Related Documentation
      2. 8.2.2 Related Products
    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

5.7 Typical Characteristics

Unless otherwise specified the following conditions apply: VIN = 12 V, fSW = 300 kHz, L = 6.5 µH, COUT = 47 µF × 4, TA = 25°C

LMR14050-Q1 Efficiency vs. Load Current
VOUT = 5 VfSW = 300 kHz
Figure 5-1 Efficiency vs. Load Current
LMR14050-Q1 Efficiency vs. Load Current
VOUT = 3.3 VfSW = 300 kHz
Figure 5-3 Efficiency vs. Load Current
LMR14050-Q1 Load Regulation
VOUT = 5 VfSW = 300 kHz
Figure 5-5 Load Regulation
LMR14050-Q1 Dropout Curve
VOUT = 5 VfSW = 300 kHz
Figure 5-7 Dropout Curve
LMR14050-Q1 Dropout Curve
VOUT = 3.3 VfSW = 300 kHz
Figure 5-9 Dropout Curve
LMR14050-Q1 Shut-down Current and Quiescent Current
Figure 5-11 Shut-down Current and Quiescent Current
LMR14050-Q1 Efficiency vs. Load Current
VOUT = 5 VfSW = 500 kHz
Figure 5-2 Efficiency vs. Load Current
LMR14050-Q1 Efficiency vs. Load Current
VOUT = 3.3 VfSW = 500 kHz
Figure 5-4 Efficiency vs. Load Current
LMR14050-Q1 Frequency vs VFB
Figure 5-6 Frequency vs VFB
LMR14050-Q1 Dropout Curve
VOUT = 5 VfSW = 500 KHz
Figure 5-8 Dropout Curve
LMR14050-Q1 Dropout Curve
VOUT = 3.3 VfSW = 500 kHz
Figure 5-10 Dropout Curve
LMR14050-Q1 UVLO Threshold
IOUT = 0 A
Figure 5-12 UVLO Threshold