JAJSKN2B November   2020  – September 2021 TPS25864-Q1 , TPS25865-Q1

PRODUCTION DATA  

  1. 特長
  2. アプリケーション
  3. 概要
  4. Revision History
  5. 概要 (続き)
  6. Device Comparison Table
  7. Pin Configuration and Functions
  8. Specifications
    1. 8.1 Absolute Maximum Ratings
    2. 8.2 ESD Ratings
    3. 8.3 Recommended Operating Conditions
    4. 8.4 Thermal Information
    5. 8.5 Electrical Characteristics
    6. 8.6 Timing Requirements
    7. 8.7 Switching Characteristics
    8. 8.8 Typical Characteristics
  9. Parameter Measurement Information
  10. 10Detailed Description
    1. 10.1 Overview
    2. 10.2 Functional Block Diagram
    3. 10.3 Feature Description
      1. 10.3.1  Power-Down or Undervoltage Lockout
      2. 10.3.2  Input Overvoltage Protection (OVP) - Continuously Monitored
      3. 10.3.3  Buck Converter
      4. 10.3.4  FREQ/SYNC
      5. 10.3.5  Bootstrap Voltage (BOOT)
      6. 10.3.6  Minimum ON-Time, Minimum OFF-Time
      7. 10.3.7  Internal Compensation
      8. 10.3.8  Selectable Output Voltage (VSET)
      9. 10.3.9  Current Limit and Short Circuit Protection
        1. 10.3.9.1 USB Switch Current Limit
        2. 10.3.9.2 Interlocking for Two-Level USB Switch Current Limit
        3. 10.3.9.3 Cycle-by-Cycle Buck Current Limit
        4. 10.3.9.4 OUT Current Limit
      10. 10.3.10 Cable Compensation
      11. 10.3.11 Thermal Management With Temperature Sensing (TS) and OTSD
      12. 10.3.12 Thermal Shutdown
      13. 10.3.13 USB Specification Overview
      14. 10.3.14 USB Port Operating Modes
        1. 10.3.14.1 Dedicated Charging Port (DCP) Mode
          1. 10.3.14.1.1 DCP BC1.2 and YD/T 1591-2009
          2. 10.3.14.1.2 DCP Divider-Charging Scheme
          3. 10.3.14.1.3 DCP 1.2-V Charging Scheme
        2. 10.3.14.2 DCP Auto Mode
    4. 10.4 Device Functional Modes
      1. 10.4.1 Shutdown Mode
      2. 10.4.2 Active Mode
  11. 11Application and Implementation
    1. 11.1 Application Information
    2. 11.2 Typical Applications
      1. 11.2.1 Design Requirements
      2. 11.2.2 Detailed Design Procedure
        1. 11.2.2.1 Output Voltage Setting
        2. 11.2.2.2 Switching Frequency
        3. 11.2.2.3 Inductor Selection
        4. 11.2.2.4 Output Capacitor Selection
        5. 11.2.2.5 Input Capacitor Selection
        6. 11.2.2.6 Bootstrap Capacitor Selection
        7. 11.2.2.7 Undervoltage Lockout Set-Point
        8. 11.2.2.8 Cable Compensation Set-Point
      3. 11.2.3 Application Curves
  12. 12Power Supply Recommendations
  13. 13Layout
    1. 13.1 Layout Guidelines
    2. 13.2 Layout Example
    3. 13.3 Ground Plane and Thermal Considerations
  14. 14Device and Documentation Support
    1. 14.1 Receiving Notification of Documentation Updates
    2. 14.2 サポート・リソース
    3. 14.3 Trademarks
    4. 14.4 Electrostatic Discharge Caution
    5. 14.5 Glossary
  15. 15Mechanical, Packaging, and Orderable Information

Typical Characteristics

Unless otherwise specified the following conditions apply: VIN = 13.5 V, fSW = 400 kHz, L = 3.3 µH, CSENSE = 141 µF, CPA_BUS = 1 µF, CPB_BUS = 1 µF, TA = 25 °C.

GUID-18FA6C0D-DB3A-48E0-8B5A-B4D31DA28DDC-low.gif
VEN/EULVO = 0 V
Figure 8-1 Shutdown Quiescent Current
GUID-5E1CF7CD-4E95-4CE3-8D5B-4E76CF4044CC-low.gif
VSET = GND
Figure 8-3 VSENSE Voltage vs Junction Temperature
GUID-568C181F-B21A-461A-A59D-317E96EC3026-low.gif
VEN/EULVO = VSENSE
Figure 8-5 DCDC UVLO Threshold
GUID-460CF335-849C-42C0-8B55-7E9F5831C797-low.gifFigure 8-7 Low-side Current Limit vs Input Voltage
GUID-19B67D21-5FF2-455B-867F-A7316A15C221-low.gif
IPA_BUS = 2.4 A IPB_BUS = 2.4 A
Figure 8-9 Low-side MOSFET on Resistance vs Junction Temperature
GUID-822B86A5-4F5E-4DDF-ADE9-BDFBB5E9BF4C-low.gif
IPA/B_BUS = 2.4 A VSET = GND
Figure 8-11 Cable Compensation Voltage vs Junction Temperature
GUID-4E3AE102-07CA-4D14-90D2-773BA3348B7F-low.gifFigure 8-13 OUT Power Switch On Resistance vs Junction Temperature
GUID-7B31FD76-3E9A-4EE1-A29C-43099D600F99-low.gifFigure 8-15 TS Temperature Hot Threshold vs Junction Temperature
GUID-C27D53BB-3102-458E-BCC2-CB2809547ADD-low.gifFigure 8-2 Precision Device Enable Threshold
GUID-0C720A21-3CEC-4672-BF6B-79C44B8B3DFC-low.gif
RVSET = 80.6 kΩ
Figure 8-4 VSENSE Voltage vs Junction Temperature
GUID-019BC98F-00F9-4708-A97C-2174654E7AB6-low.gifFigure 8-6 High-side Current Limit vs Input Voltage
GUID-9CCBF6A8-9727-488F-9E8A-738ABF7CABFB-low.gif
IPA_BUS = 2.4 A IPB_BUS = 2.4 A
Figure 8-8 High-side MOSFET on Resistance vs Junction Temperature
GUID-2F527D18-33AD-4FC7-9BC2-ED3510F28830-low.gifFigure 8-10 OUT Power Switch Current Limit vs Junction Temperature
GUID-2FF50399-D1C7-4A89-B68D-1F0E0DAD7C3E-low.gifFigure 8-12 USB Power Switch On Resistance vs Junction Temperature
GUID-5074BC91-7FE6-4343-A298-A545CEDC2F81-low.gif
RFREQ = 49.9 kΩ
Figure 8-14 Switching Frequency vs Junction Temperature
GUID-39FA1CFF-CACB-4D3F-8591-9AB2E6EE1B2F-low.gifFigure 8-16 SENSE Voltage in Temperature Hot vs Junction Temperature