JAJSST5A June   2015  – February 2024 LV14540

PRODUCTION DATA  

  1.   1
  2. 1 特長
  3. 2 アプリケーション
  4. 3 概要
  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  Pulse Skipping 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 Best Design Practices
    4. 7.4 Power Supply Recommendations
    5. 7.5 Layout
      1. 7.5.1 Layout Guidelines
      2. 7.5.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Documentation Support
      1. 8.1.1 Related Documentation
    2. 8.2 ドキュメントの更新通知を受け取る方法
    3. 8.3 サポート・リソース
    4. 8.4 Trademarks
    5. 8.5 静電気放電に関する注意事項
    6. 8.6 用語集
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

パッケージ・オプション

メカニカル・データ（パッケージ｜ピン）
サーマルパッド・メカニカル・データ
発注情報

7.2.3 Application Curves

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

GUID-010FEEA8-F7DF-4A22-97C0-003C6E288BC0-low.gif
VIN = 12 VVOUT = 5 VIOUT = 2 A
Figure 7-2 Start-Up by EN
GUID-A7913E6E-7C2D-4C08-9E3E-9CAF13B56F5A-low.gif
VIN = 12 VVOUT = 5 VIOUT = 0 A
Figure 7-4 Pulse Skipping Mode
GUID-03FC1C29-97F0-42E0-A10A-4D1937DF5CD1-low.gif
VIN = 12 VVOUT = 5VIOUT = 5A
Figure 7-6 CCM Mode
GUID-EE424E4E-BBAF-4A01-9A22-636152829C04-low.gif
VIN = 12 VVOUT = 5 V
Figure 7-8 Output Short
GUID-3019E7CF-E8F2-41B9-A8AA-F06FC1CF6F18-low.gif
VIN = 12 VVOUT = 5 VIOUT = 2 A
Figure 7-3 Start-Up by VIN
GUID-E5758181-A36C-46F4-A09A-AEEFD6FF8C0B-low.gif
VIN = 12 VVOUT = 5 VIOUT = 100 mA
Figure 7-5 DCM Mode
GUID-0D40C514-DA82-4E6D-AC12-AC693A334557-low.gif
IOUT: 10% → 100% of 5 ASlew rate = 100 mA/μs
Figure 7-7 Load Transient
GUID-41D449BF-2DB8-42F2-9337-CF74593FB5B9-low.gif
VIN = 12 VVOUT = 5 V
Figure 7-9 Output Short Recovery