JAJSF89C March   2013  – December 2019 TPS84A20

PRODUCTION DATA.  

  1. 1 特長
  2. 2 アプリケーション
  3. 3 概要
    1.     Device Images
      1.      アプリケーション概略図
  4. 4 改訂履歴
  5. 5 概要（続き）
  6. 6 Ordering Information
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 Recommended Operating Conditions
    3. 7.3 Package Specifications
    4. 7.4 Electrical Characteristics
    5. 7.5 Thermal Information
  8. 8 Device Information
    1. 8.1      Functional Block Diagram
    2. Table 1. Pin Descriptions
  9. 9 Typical Characteristics (PVIN = VIN = 12 V)
  10. 10Typical Characteristics (PVIN = VIN = 5 V)
  11. 11Typical Characteristics (PVIN = 3.3 V, VIN = 5 V)
  12. 12Application Information
    1. 12.1  Adjusting the Output Voltage
    2. 12.2  Capacitor Recommendations for the TPS84A20 Power Supply
      1. 12.2.1 Capacitor Technologies
        1. 12.2.1.1 Electrolytic, Polymer-Electrolytic Capacitors
        2. 12.2.1.2 Ceramic Capacitors
        3. 12.2.1.3 Tantalum, Polymer-Tantalum Capacitors
      2. 12.2.2 Input Capacitor
      3. 12.2.3 Output Capacitor
    3. 12.3  Transient Response
    4. 12.4  Transient Waveforms
    5. 12.5  Application Schematics
    6. 12.6  VIN and PVIN Input Voltage
    7. 12.7  3.3 V PVIN Operation
    8. 12.8  Power Good (PWRGD)
    9. 12.9  Light Load Efficiency (LLE)
    10. 12.10 SYNC_OUT
    11. 12.11 Parallel Operation
    12. 12.12 Power-Up Characteristics
    13. 12.13 Pre-Biased Start-Up
    14. 12.14 Remote Sense
    15. 12.15 Thermal Shutdown
    16. 12.16 Output On/Off Inhibit (INH)
    17. 12.17 Slow Start (SS/TR)
    18. 12.18 Overcurrent Protection
    19. 12.19 Synchronization (CLK)
    20. 12.20 Sequencing (SS/TR)
    21. 12.21 Programmable Undervoltage Lockout (UVLO)
    22. 12.22 Layout Considerations
    23. 12.23 EMI
  13. 13デバイスおよびドキュメントのサポート
    1. 13.1 ドキュメントの更新通知を受け取る方法
    2. 13.2 サポート・リソース
    3. 13.3 商標
    4. 13.4 静電気放電に関する注意事項
    5. 13.5 Glossary
  14. 14メカニカル、パッケージ、および注文情報
    1. 14.1 Tape and Reel Information

パッケージ・オプション

デバイスごとのパッケージ図は、PDF版データシートをご参照ください。

メカニカル・データ（パッケージ｜ピン）
  • RVQ|42
サーマルパッド・メカニカル・データ
発注情報

12.12 Power-Up Characteristics

When configured as shown in the front page schematic, the TPS84A20 produces a regulated output voltage following the application of a valid input voltage. During the power-up, internal soft-start circuitry slows the rate that the output voltage rises, thereby limiting the amount of in-rush current that can be drawn from the input source. Figure 27 shows the start-up waveforms for a TPS84A20, operating from a 5-V input (PVIN = VIN) and with the output voltage adjusted to 1.8 V. Figure 28 shows the start-up waveforms for a TPS84A20 starting up into a pre-biased output voltage. The waveforms were measured with a 5-A constant current load.

TPS84A20 start_up.pngFigure 27. Start-Up Waveforms
TPS84A20 prebias_start_up.pngFigure 28. Start-up into Pre-bias