JAJSPL2 October   2024 TPSM82916

ADVANCE INFORMATION  

  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 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  Smart Config (S-CONF)
      2. 6.3.2  Device Enable (EN/SYNC)
      3. 6.3.3  Device Synchronization (EN/SYNC)
      4. 6.3.4  Spread Spectrum Modulation
      5. 6.3.5  Output Discharge
      6. 6.3.6  Undervoltage Lockout (UVLO)
      7. 6.3.7  Power-Good Output
      8. 6.3.8  Noise Reduction and Soft-Start Capacitor (NR/SS)
      9. 6.3.9  Current Limit and Short-Circuit Protection
      10. 6.3.10 Thermal Shutdown
    4. 6.4 Device Functional Modes
      1. 6.4.1 Fixed Frequency Pulse Width Modulation
      2. 6.4.2 Low Duty Cycle Operation
      3. 6.4.3 High Duty Cycle Operation (100% Duty Cycle)
      4. 6.4.4 Second Stage L-C Filter Compensation (Optional)
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Applications
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
        1. 7.2.2.1 Custom Design With WEBENCH® Tools
        2. 7.2.2.2 External Component Selection
          1. 7.2.2.2.1 Switching Frequency Selection
          2. 7.2.2.2.2 Output Capacitor Selection
          3. 7.2.2.2.3 Ferrite Bead Selection for Second L-C Filter
          4. 7.2.2.2.4 Input Capacitor Selection
          5. 7.2.2.2.5 Setting the Output Voltage
          6. 7.2.2.2.6 NR/SS Capacitor Selection
    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 サード・パーティ製品に関する免責事項
      2. 8.1.2 Development Support
        1. 8.1.2.1 Custom Design With WEBENCH® Tools
    2. 8.2 Documentation Support
      1. 8.2.1 Related Documentation
    3. 8.3 ドキュメントの更新通知を受け取る方法
    4. 8.4 サポート・リソース
    5. 8.5 Trademarks
    6. 8.6 静電気放電に関する注意事項
    7. 8.7 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）
  • VCE|16
サーマルパッド・メカニカル・データ
発注情報

6.3.7 Power-Good Output

The device has a power-good output. The PG pin goes high impedance after the FB pin voltage is above 95% of the nominal voltage, and is driven low after the voltage falls below typically 90% of the nominal voltage. Table 6-2 shows the typical PG pin logic. The PG pin is an open-drain output and is specified to sink up to 10mA. The power-good output requires a pullup resistor connecting to any voltage rail less than 18V. The PG signal can be used for sequencing of multiple rails by connecting to the EN pin of other modules. If not used, the PG pin can be left floating or connected to GND. PG has a deglitch time of typically 8μs before going low.

Table 6-2 Power-Good Pin Logic
DEVICE STATEPG LOGIC STATUS
HIGH IMPEDANCELOW
Enabled (EN/SYNC = High)VFB ≥ VPG√
VFB < VPG after tPG√
Shutdown (EN/SYNC = Low)√
UVLO0.7V < VIN < VUVLO√
Thermal shutdownTJ > TJSD√
Power supply removalVIN < 0.7V√