ZHCSSC1B June   2015  – December 2024 LV14240

PRODUCTION DATA  

  1.   1
  2. 1 特性
  3. 2 应用
  4. 3 说明
  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  Low Dropout Operation and Bootstrap Voltage (BOOT)
      4. 6.3.4  Adjustable Output Voltage
      5. 6.3.5  Enable and Adjustable Undervoltage Lockout
      6. 6.3.6  External Soft Start
      7. 6.3.7  Switching Frequency and Synchronization (RT/SYNC)
      8. 6.3.8  Overcurrent and Short-Circuit Protection
      9. 6.3.9  Overvoltage Protection
      10. 6.3.10 Thermal Shutdown
    4. 6.4 Device Functional Modes
      1. 6.4.1 Pulse Skipping Mode
  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 接收文档更新通知
    2. 8.2 支持资源
    3. 8.3 Trademarks
    4. 8.4 静电放电警告
    5. 8.5 术语表
  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 = 1 MHz, L = 5.5 µH, COUT = 47 µF, TA = 25°C.

LV14240 Efficiency vs Load Current
VOUT = 5 V fSW = 1 MHz
Figure 5-1 Efficiency vs Load Current
LV14240 Efficiency vs Load Current
VOUT = 3.3 V fSW = 1 MHz
Figure 5-3 Efficiency vs Load Current
LV14240 Load Regulation
VOUT = 5 V fSW = 1 MHz
Figure 5-5 Load Regulation
LV14240 Dropout Curve
VOUT = 5 V fSW = 1 MHz
Figure 5-7 Dropout Curve
LV14240 Dropout Curve
VOUT = 3.3 V fSW = 1 MHz
Figure 5-9 Dropout Curve
LV14240 Shutdown CurrentFigure 5-11 Shutdown Current
LV14240 Efficiency vs Load Current
VOUT = 5 V fSW = 2 MHz
Figure 5-2 Efficiency vs Load Current
LV14240 Efficiency vs Load Current
VOUT = 3.3 V fSW = 2 MHz
Figure 5-4 Efficiency vs Load Current
LV14240 Frequency vs VFBFigure 5-6 Frequency vs VFB
LV14240 Dropout Curve
VOUT = 5 V fSW = 2 MHz
Figure 5-8 Dropout Curve
LV14240 Dropout Curve
VOUT = 3.3 V fSW = 2 MHz
Figure 5-10 Dropout Curve
LV14240 UVLO Threshold
IOUT = 0 A
Figure 5-12 UVLO Threshold