JAJSJP4A August   2017  – September 2020 LV14360

PRODUCTION DATA  

  1. 1 特長
  2. 2 アプリケーション
  3. 3 概要
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
    1.     Pin Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Switching Characteristics
    7. 7.7 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1  Fixed Frequency Peak Current Mode Control
      2. 8.3.2  Slope Compensation
      3. 8.3.3  Sleep Mode
      4. 8.3.4  Low Dropout Operation and Bootstrap Voltage (BOOT)
      5. 8.3.5  Adjustable Output Voltage
      6. 8.3.6  Enable and Adjustable Undervoltage Lockout
      7. 8.3.7  External Soft Start
      8. 8.3.8  Switching Frequency and Synchronization (RT/SYNC)
      9. 8.3.9  Power Good (PGOOD)
      10. 8.3.10 Overcurrent and Short-Circuit Protection
      11. 8.3.11 Overvoltage Protection
      12. 8.3.12 Thermal Shutdown
    4. 8.4 Device Functional Modes
      1. 8.4.1 Shutdown Mode
      2. 8.4.2 Active Mode
      3. 8.4.3 CCM Mode
      4. 8.4.4 Light Load Operation
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Output Voltage Set-Point
        2. 9.2.2.2 Switching Frequency
        3. 9.2.2.3 Output Inductor Selection
        4. 9.2.2.4 Output Capacitor Selection
        5. 9.2.2.5 Schottky Diode Selection
        6. 9.2.2.6 Input Capacitor Selection
        7. 9.2.2.7 Bootstrap Capacitor Selection
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 ドキュメントの更新通知を受け取る方法
    2. 12.2 サポート・リソース
    3. 12.3 Trademarks
    4. 12.4 用語集
    5. 12.5 静電気放電に関する注意事項
  13. 13Mechanical, 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

7.6 Switching Characteristics

Over the recommended operating junction temperature range of –40°C to 125°C (unless otherwise noted)
PARAMETERTEST CONDITIONSMINTYPMAXUNIT
ƒSWSwitching frequencyRT = 11.5 kΩ1912kHz
Switching frequency range at SYNC mode2502000
VSYNC_HISYNC clock high level threshold1.7V
VSYNC_LOSYNC clock low level threshold0.5
TSYNC_MINMinimum SYNC input pulse widthMeasured at 500 kHz, VSYNC_HI > 3 V, VSYNC_LO < 0.3 V30ns
TLOCK_INPLL lock in timeMeasured at 500 kHz100µs
TON_MINMinimum controllable on timeVIN = 12 V, BOOT to SW = 5.8 V, ILoad = 1 A100ns
DMAXMaximum duty cyclefSW = 200 kHz90%