JAJSNP4A May   2023  – February 2024 TPS54KB20

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 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  Internal VCC LDO and Using External Bias On the VCC Pin
      2. 6.3.2  Enable
      3. 6.3.3  Adjustable Soft Start
      4. 6.3.4  Power Good
      5. 6.3.5  Output Voltage Setting
      6. 6.3.6  Remote Sense
      7. 6.3.7  D-CAP4 Control
      8. 6.3.8  Multifunction Select (MSEL) Pin
      9. 6.3.9  Low-side MOSFET Zero-Crossing
      10. 6.3.10 Current Sense and Positive Overcurrent Protection
      11. 6.3.11 Low-side MOSFET Negative Current Limit
      12. 6.3.12 Overvoltage and Undervoltage Protection
      13. 6.3.13 Output Voltage Discharge
      14. 6.3.14 UVLO Protection
      15. 6.3.15 Thermal Shutdown
    4. 6.4 Device Functional Modes
      1. 6.4.1 Auto-Skip Eco-mode Light Load Operation
      2. 6.4.2 Forced Continuous-Conduction Mode
      3. 6.4.3 Powering the Device From a Single Bus
      4. 6.4.4 Powering the Device From a Split-rail Configuration
  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 Setting Point
        2. 7.2.2.2  Choose the Switching Frequency and the Operation Mode
        3. 7.2.2.3  Choose the Inductor
        4. 7.2.2.4  Set the Current Limit (ILIM)
        5. 7.2.2.5  Choose the Output Capacitor
        6. 7.2.2.6  RAMP Selection
        7. 7.2.2.7  Choose the Input Capacitors (CIN)
        8. 7.2.2.8  Soft-Start Capacitor (SS Pin)
        9. 7.2.2.9  EN Pin Resistor Divider
        10. 7.2.2.10 VCC Bypass Capacitor
        11. 7.2.2.11 BOOT Capacitor
        12. 7.2.2.12 RC Snubber
        13. 7.2.2.13 PG Pullup Resistor
      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 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

GUID-20240109-SS0I-R5L4-6MWR-0KLLNL1XHSRR-low.svg
VOUT = 3.3V VVCC = 3V internal fSW = 800kHz
LOUT = 470nH DCR = 1.85mΩ Skip-mode
Figure 7-2 Efficiency – Skip-mode
GUID-20240109-SS0I-HGTZ-XFXK-D7TRBTSMJQK8-low.svgFigure 7-4 Load Regulation
GUID-20240110-SS0I-GHKH-NLHS-K3DMRCPVDWC0-low.png

IOUT = 5A to 15A at 1A/μs
RMSEL = 86.6kΩ fSW = 800kHz RAMP1

Figure 7-6 Load Transient
GUID-20240110-SS0I-KFDN-BPD5-7L6CV1T3FQN5-low.png
VIN = 12V VOUT = 3.3V IOUT = 10mA
Figure 7-8 Output Voltage Ripple – Skip-mode
GUID-20240110-SS0I-N0PZ-S4RW-R0MNXKBLLFJK-low.png
VIN = 12V VOUT = 3.3V IOUT = 25A
Figure 7-10 Start-Up With EN
GUID-20240109-SS0I-WRKP-TKHB-FTRLDP7MPXN3-low.svg
VOUT = 3.3V VVCC = 3V internal fSW = 800kHz
LOUT = 470nH DCR = 1.85mΩ FCCM
Figure 7-3 Efficiency – FCCM
GUID-20240109-SS0I-XMP1-PD63-ZRFD7LBV02TR-low.svgFigure 7-5 Line Regulation
GUID-20240109-SS0I-DS0T-1MQV-FLJNKWMSZXK1-low.svg
IOUT = 10A
RMSEL = 86.6kΩ fSW = 800kHz RAMP1
Figure 7-7 Bode Plot
GUID-20240110-SS0I-LBSS-LN1V-KTXD93CQWFMP-low.png
VIN = 12V VOUT = 3.3V IOUT = 25A
Figure 7-9 Output Voltage Ripple – FCCM
GUID-20240110-SS0I-F0VM-X4G8-CFHBTLMWLTD7-low.png
VIN = 12V VOUT = 3.3V IOUT = 25A
Figure 7-11 Shutdown With EN