SLVSFC5 November   2020 TPS552882

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  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 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  Operation Mode Setting
      3. 7.3.3  Input Undervoltage Lockout
      4. 7.3.4  Enable and Programmable UVLO
      5. 7.3.5  Soft Start
      6. 7.3.6  Shutdown
      7. 7.3.7  Switching Frequency
      8. 7.3.8  Switching Frequency Dithering
      9. 7.3.9  Inductor Current Limit
      10. 7.3.10 Internal Charge Path
      11. 7.3.11 Output Voltage Setting
      12. 7.3.12 Output Current Indication and Cable Voltage Drop Compensation
      13. 7.3.13 Integrated Gate Drivers
      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
  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 5V Power Supply Detailed Design Procedure
        1. 8.2.2.1 Custom Design With WEBENCH® Tools
        2. 8.2.2.2 Switching Frequency
        3. 8.2.2.3 Output Voltage Setting
        4. 8.2.2.4 Inductor Selection
        5. 8.2.2.5 Input Capacitor
        6. 8.2.2.6 Output Capacitor
        7. 8.2.2.7 Output Current Limit
        8. 8.2.2.8 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 Third-Party Products Disclaimer
      2. 11.1.2 Development Support
        1. 11.1.2.1 Custom Design With WEBENCH® Tools
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Support Resources
    4. 11.4 Trademarks
    5. 11.5 Glossary
    6. 11.6 Electrostatic Discharge Caution

Package Options

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

7.3.1 VCC Power Supply

An internal LDO to supply the TPS552882 outputs regulated 5.2-V voltage at the VCC pin with 60-mA output current capability. When VIN is less than VOUT, the internal LDO selects the power supply source by comparing VIN to a rising threshold of 6.2 V with 0.3-V hysteresis. When VIN is higher than 6.2 V, the supply for LDO is VIN. When VIN is lower than 5.9 V, 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 6.2 V with 0.3-V hysteresis. When VOUT is higher than 6.2 V, the supply for LDO is VOUT. When VOUT is lower than 5.9 V, the supply for LDO is VIN. Table 7-1 shows the supply source selection for the internal LDO.

Table 7-1 VCC Power Supply Logic
VIN VOUT INPUT for VCC LDO
VIN > 6.2 V VOUT >VIN VIN
VIN < 5.9 V VOUT >VIN VOUT
VIN > VOUT VOUT > 6.2 V VOUT
VIN > VOUT VOUT < 5.9 V VIN

To minimize the power dissipation of the internal LDO when both input voltage and output voltage are high, an external 5-V power source can be applied at the VCC pin to supply the TPS552882. The external 5-V power supply must have at least 100-mA output current capability and must be within the 4.75-V to 5.5-V regulation range. To use an external power supply for VCC, a resistor with proper resistance must be connected to the MODE pin.