ZHCSNR7A March   2022  – August 2022 TPS55289

PRODUCTION DATA  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 I2C Timing Characteristics
    7. 6.7 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  VCC Power Supply
      2. 7.3.2  EXTVCC Power Supply
      3. 7.3.3  Operation Mode Setting
      4. 7.3.4  Input Undervoltage Lockout
      5. 7.3.5  Enable and Programmable UVLO
      6. 7.3.6  Soft Start
      7. 7.3.7  Shutdown and Load Discharge
      8. 7.3.8  Switching Frequency
      9. 7.3.9  Switching Frequency Dithering
      10. 7.3.10 Inductor Current Limit
      11. 7.3.11 Internal Charge Path
      12. 7.3.12 Output Voltage Setting
      13. 7.3.13 Output Current Monitoring and Cable Voltage Droop Compensation
      14. 7.3.14 Output Current Limit
      15. 7.3.15 Overvoltage Protection
      16. 7.3.16 Output Short Circuit Protection
      17. 7.3.17 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 PWM Mode
      2. 7.4.2 Power Save Mode
    5. 7.5 Programming
      1. 7.5.1 Data Validity
      2. 7.5.2 START and STOP Conditions
      3. 7.5.3 Byte Format
      4. 7.5.4 Acknowledge (ACK) and Not Acknowledge (NACK)
      5. 7.5.5 Target Address and Data Direction Bit
      6. 7.5.6 Single Read and Write
      7. 7.5.7 Multiread and Multiwrite
    6. 7.6 Register Maps
      1. 7.6.1 REF Register (Address = 0h, 1h)
      2. 7.6.2 IOUT_LIMIT Register (Address = 2h) [reset = 11100100h]
      3. 7.6.3 VOUT_SR Register (Address = 3h) [reset = 00000001h]
      4. 7.6.4 VOUT_FS Register (Address = 4h) [reset = 00000011h]
      5. 7.6.5 CDC Register (Address = 5h) [reset = 11100000h]
      6. 7.6.6 MODE Register (Address = 6h) [reset = 00100000h]
      7. 7.6.7 STATUS Register (Address = 7h) [reset = 00000011h]
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Switching Frequency
        2. 8.2.2.2 Output Voltage Setting
        3. 8.2.2.3 Inductor Selection
        4. 8.2.2.4 Input Capacitor
        5. 8.2.2.5 Output Capacitor
        6. 8.2.2.6 Output Current Limit
        7. 8.2.2.7 Loop Stability
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 第三方产品免责声明
    2. 11.2 接收文档更新通知
    3. 11.3 支持资源
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 术语表
  12. 12Mechanical, Packaging, and Orderable Information

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6.7 Typical Characteristics

VIN = 12 V, TA = 25°C, fSW = 400 kHz, unless otherwise noted
VIN = 12 V, TA = 25°C, fSW = 400 kHz, unless otherwise notedFigure 6-1 Efficiency vs Output Current,
VOUT = 5 V, FPWM. VIN = 12 V, TA = 25°C, fSW = 400 kHz, unless otherwise noted
Figure 6-3 Efficiency vs Output Current,
VOUT = 9 V, FPWM
Figure 6-5 Efficiency vs Output Current,
VOUT = 12 V, FPWM
Figure 6-7 Efficiency vs Output Current,
VOUT = 15 V, FPWM
Figure 6-9 Efficiency vs Output Current,
VOUT = 20 V, FPWM
Figure 6-11 Switching Frequency vs Setting Resistance
Figure 6-13 Reference Voltage vs Temperature (VREF = 0.508 V)
Figure 6-15 Reference Voltage vs Temperature (VREF = 1.129 V)
Figure 6-17 Shutdown Current vs Temperature
Figure 6-19 Switching Frequency vs Temperature
Figure 6-2 Efficiency vs Output Current,
VOUT = 5 V, PFM
Figure 6-4 Efficiency vs Output Current,
VOUT = 9 V, PFM
Figure 6-6 Efficiency vs Output Current,
VOUT = 12 V, PFM
Figure 6-8 Efficiency vs Output Current,
VOUT = 15 V, PFM
Figure 6-10 Efficiency vs Output Current,
VOUT = 20 V, PFM
Figure 6-12 Reference Voltage vs Temperature (VREF = 0.282 V)
Figure 6-14 Reference Voltage vs Temperature (VREF = 0.846 V)
Figure 6-16 Quiescent Current vs Temperature
Figure 6-18 ENABLE/UVLO Rising Threshold vs Temperature
Figure 6-20 CDC Voltage vs Output Current with RSENSE = 10 mΩ