SLVSHR3 July   2024 TPS551892-Q1

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  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  VCC Power Supply
      2. 6.3.2  EXTVCC Power Supply
      3. 6.3.3  Input Undervoltage Lockout
      4. 6.3.4  Enable and Programmable UVLO
      5. 6.3.5  Soft Start
      6. 6.3.6  Shutdown
      7. 6.3.7  Switching Frequency
      8. 6.3.8  Switching Frequency Dithering
      9. 6.3.9  Inductor Current Limit
      10. 6.3.10 Internal Charge Path
      11. 6.3.11 Output Voltage Setting
      12. 6.3.12 Output Current Monitoring and Cable Voltage Droop Compensation
      13. 6.3.13 Output Current Limit
      14. 6.3.14 Overvoltage Protection
      15. 6.3.15 Output Short Circuit Protection
      16. 6.3.16 Power Good
      17. 6.3.17 Constant Current Output Indication
      18. 6.3.18 Thermal Shutdown
    4. 6.4 Device Functional Modes
      1. 6.4.1 PWM Mode
      2. 6.4.2 Power Save Mode
  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 Switching Frequency
        2. 7.2.2.2 Output Voltage Setting
        3. 7.2.2.3 Inductor Selection
        4. 7.2.2.4 Input Capacitor
        5. 7.2.2.5 Output Capacitor
        6. 7.2.2.6 Output Current Limit
        7. 7.2.2.7 Loop Stability
      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 Device Support
      1. 8.1.1 Third-Party Products Disclaimer
    2. 8.2 Receiving Notification of Documentation Updates
    3. 8.3 Support Resources
    4. 8.4 Trademarks
    5. 8.5 Electrostatic Discharge Caution
    6. 8.6 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

6.3.1 VCC Power Supply

An internal LDO to supply the TPS551892-Q1 outputs regulated 5.2V voltage at the VCC pin. When VIN is less than VOUT, the internal LDO selects the power supply source by comparing VIN to a rising threshold of 6.2V with 0.3V hysteresis. When VIN is higher than 6.2V, the supply for LDO is VIN. When VIN is lower than 5.9V, the supply for LDO is VOUT. When VOUT is less than VIN, the internal LDO selects the power supply source by comparing VOUT to a rising threshold of 6.2V with 0.3V hysteresis. When VOUT is higher than 6.2V, the supply for LDO is VOUT. When VOUT is lower than 5.9V, the supply for LDO is VIN. Table 6-1 shows the supply source selection for the internal LDO.

Table 6-1 VCC Power Supply Logic
VIN VOUT INPUT for VCC LDO
VIN > 6.2V VOUT > VIN VIN
VIN < 5.9V VOUT > VIN VOUT
VIN > VOUT VOUT > 6.2V VOUT
VIN > VOUT VOUT < 5.9V VIN