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

5.6 Typical Characteristics

GUID-20240116-SS0I-GZH3-X42S-4DTRXSGRRFL0-low.svg
VIN = 12V VVCC = 3V internal fSW = 800kHz
LOUT = 470nH DCR = 1.35mΩ FCCM
Figure 5-1 Efficiency With VOUT ≥ 1.8V
GUID-20240116-SS0I-FFXH-WZC0-V64PHPDLGFMV-low.svg
VIN = 12V VVCC = 3V internal VOUT = 3.3V
LOUT = 470nH DCR = 1.35mΩ FCCM
Figure 5-3 Efficiency versus fSW With VOUT = 3.3V
GUID-20240116-SS0I-BT3T-WL5F-BRXTV9C7HPQZ-low.svg
VIN = 12V VOUT = 3.3V fSW = 800kHz
LOUT = 470nH DCR = 1.35mΩ FCCM
Figure 5-5 Efficiency versus VCC Bias With VOUT = 3.3V
GUID-20230501-SS0I-KVQF-WRGN-HB7V6ZWKL5KK-low.svg
VIN = 12V VVCC = 3V internal IOUT = 20A
LOUT = 800nH fSW = 800kHz
Figure 5-7 Thermal Image – 5V Output, TPS54KB20EVM, 6 Layers
GUID-20230501-SS0I-WZH6-NH1Q-PPVBJWVQKKH4-low.svg
VIN = 12V VVCC = 3V internal IOUT = 20A
LOUT = 800nH fSW = 800kHz
Figure 5-9 Thermal Image – 5V Output, 3 Inch × 3 Inch, 4 Layers
GUID-20230501-SS0I-4RSV-M08Q-H0J9ZZ3XH5JJ-low.svg
VIN = 12V VVCC = 3V internal IOUT = 25A
LOUT = 150nH fSW = 1100kHz
Figure 5-11 Thermal Image – 1V Output, TPS54KB20EVM, 6 Layers
GUID-20240116-SS0I-6TSW-B6R7-GHS92NV7SJQ9-low.svg
LOUT = 470nH VVCC = 3V internal IOUT = 5A
Figure 5-13 800kHz Switching Frequency versus Input Voltage
GUID-20240116-SS0I-M777-KX1V-QMMN4WTBSPLK-low.svg
LOUT = 470nH VVCC = 3V internal IOUT = 5A
Figure 5-15 1400kHz Switching Frequency versus Input Voltage
GUID-20240116-SS0I-NZ5K-8N41-5GS3R5WVBKHV-low.svg
VIN = 12V VVCC = 3V internal Skip-mode
Figure 5-17 800kHz Skip-mode Switching Frequency versus Output Current
GUID-20240116-SS0I-6NDQ-JCS6-TWLGWM77XVNG-low.svg
VIN = 12V VVCC = 3V internal FCCM
Figure 5-19 1400kHz Switching Frequency versus Output Current
GUID-20240116-SS0I-PGHK-FXHG-QZWFJC7WCWWH-low.svg
VIN = 12V
Figure 5-21 0.9V Reference Voltage versus Junction Temperature
GUID-20240116-SS0I-GHLQ-JRTT-WTXKZHZVXPWX-low.svg
VIN = 12V VEN = 0V No external VCC bias
Figure 5-23 VIN Pin Shutdown Quiescent Current versus Junction Temperature
GUID-20240116-SS0I-77QR-XM0W-HCRDKZKSWWZ2-low.svg
VIN = 12V Open loop
Figure 5-25 Valley Current Limit versus Junction Temperature (Low RILIM)
GUID-20240116-SS0I-GMFR-BF9S-ZJXW4X4NL29S-low.svg
VIN = 12V VVCC = 3.3V VBOOT-SW = 3V
Figure 5-27 MOSFET RDS(ON) versus Junction Temperature
GUID-20240116-SS0I-GTKV-JRQF-XTP8QCX10JJS-low.svg
VIN = 12V
Figure 5-29 VCC Pin Undervoltage Lockout versus Junction Temperature
GUID-20240116-SS0I-PVQN-GCM8-VV83LMF4QHVJ-low.svg
VIN = 12V VEN = 7V
Figure 5-31 EN Pin Internal Resistance to Ground versus Junction Temperature
GUID-20240116-SS0I-HNXC-PXGC-GXRT7R7LDKLW-low.svg
VIN = 12V VEN = 2V
Figure 5-33 Soft-Start Done Voltage Threshold versus Junction Temperature (VREF = 0.5V)
GUID-20240116-SS0I-SNDN-KRSC-BGBQ1SFKRRKK-low.svg
VIN = 12V
Figure 5-35 Power-Good Thresholds versus Junction Temperature (VREF = 0.5V)
GUID-20240116-SS0I-W8C4-MSLN-QT3JHLLBMGBL-low.svg
VIN = 0V VVCC = 0V VEN = 0V
Figure 5-37 Power-Good Clamp Voltage versus Junction Temperature
GUID-20240116-SS0I-QFNV-1NZZ-M919F5B81T87-low.svg
VIN = 12V VVCC = 3V internal fSW = 800kHz
LOUT = 150nH DCR = 0.15mΩ FCCM
Figure 5-2 Efficiency With VOUT ≤ 1.8V
GUID-20240116-SS0I-5PTV-BPQQ-3R70NWG05ZSL-low.svg
VIN = 12V VVCC = 3V internal VOUT = 1.0V
LOUT = 150nH DCR = 0.15mΩ FCCM
Figure 5-4 Efficiency versus fSW With VOUT = 1.0V
GUID-20240116-SS0I-3ZSJ-VGGD-MRBRQBCQRZKR-low.svg
VIN = 12V VOUT = 1.0V fSW = 800kHz
LOUT = 150nH DCR = 0.15mΩ FCCM
Figure 5-6 Efficiency versus VCC Bias With VOUT = 1.0V
GUID-20230501-SS0I-5QPC-1GGH-5BQTQ5VKTQHP-low.svg
VIN = 12V VVCC = 3V internal IOUT = 25A
LOUT = 470nH fSW = 800kHz
Figure 5-8 Thermal Image – 3.3V Output, TPS54KB20EVM, 6 Layers
GUID-20230501-SS0I-0ZJD-CMTX-04X1CQZBBTFS-low.svg
VIN = 12V VVCC = 3V internal IOUT = 20A
LOUT = 470nH fSW = 800kHz
Figure 5-10 Thermal Image – 3.3V Output, 3 Inch × 3 Inch, 4 Layers
GUID-20240108-SS0I-WM7X-J3ZR-XWDF75TGT9RD-low.svg
VIN = 12V VVCC = 3V internal IOUT = 5A
LOUT = 470nH
Figure 5-12 Switching Frequency versus Output Voltage
GUID-20240116-SS0I-XKLG-FNPS-XBPP6R07GNVD-low.svg
LOUT = 470nH VVCC = 3V internal IOUT = 5A
Figure 5-14 1100kHz Switching Frequency versus Input Voltage
GUID-20240116-SS0I-DD2B-QJLD-FNTTRPFL768H-low.svg
VIN = 12V VVCC = 3V internal FCCM
Figure 5-16 800kHz FCCM Switching Frequency versus Output Current
GUID-20240116-SS0I-8WH5-7D6Q-1PCFNLK6BXQM-low.svg
VIN = 12V VVCC = 3V internal FCCM
Figure 5-18 1100kHz Switching Frequency versus Output Current
GUID-20240116-SS0I-0NN3-6HCD-TSFHWPBK0X79-low.svg
VIN = 12V
Figure 5-20 0.5V Reference Voltage versus Junction Temperature
GUID-20240116-SS0I-40CR-CJS3-FLXCVJJF1Z9L-low.svg
VIN = 12V VEN = 2V IVCC = 25mA
Figure 5-22 VCC Pin Output Voltage versus Junction Temperature
GUID-20240116-SS0I-J3LJ-H1BL-GMKQL3LKCJXP-low.svg
VIN = 12V VEN = 2V No external VCC bias
VFB = VREF + 10mV
Figure 5-24 VIN Pin Nonswitching Quiescent Current versus Junction Temperature
GUID-20240116-SS0I-HPM0-ZGQL-9W3MHPNZ2V2S-low.svg
VIN = 12V Open loop
Figure 5-26 Valley Current Limit versus Junction Temperature (High RILIM)
GUID-20240116-SS0I-GHXF-STCG-C4RTGJZNHSQT-low.svgFigure 5-28 VIN Pin Undervoltage Lockout versus Junction Temperature
GUID-20240116-SS0I-CS6H-HJHK-SBQSGXQ7P8BP-low.svg
VIN = 12V
Figure 5-30 EN Pin Thresholds versus Junction Temperature
GUID-20240116-SS0I-QSH4-S7VC-CDPPHN7NPNGL-low.svg
VIN = 12V VEN = 2V
Figure 5-32 SS Pin Output Current versus Junction Temperature
GUID-20240116-SS0I-MMS2-7WKF-B6ZW0RDM6X06-low.svg
VIN = 12V VEN = 2V
Figure 5-34 Soft-Start Done Voltage Threshold versus Junction Temperature (VREF = 0.9V)
GUID-20240116-SS0I-BG65-49CG-XG9FZFVX2GP2-low.svg
VIN = 12V
Figure 5-36 Power-Good Thresholds versus Junction Temperature (VREF = 0.9V)
GUID-20240118-SS0I-K9FB-QB7C-NRXLDRR2VHRN-low.svg
VIN = 12V VEN = 3V VFB = VREF + 10mV
Figure 5-38 Power-Good Leakage Current versus Power-Good Voltage