SLVSGG8 November   2023 TPS6287B10 , TPS6287B25

PRODMIX  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Options
  6. 5 Pin Configuration and Functions
  7. 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 Interface Timing Characteristics
    7. 6.7 Typical Characteristics
  8. 7 Parameter Measurement Information
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1  Fixed-Frequency DCS-Control Topology
      2. 8.3.2  Forced-PWM and Power-Save Modes
      3. 8.3.3  Transient Non-Synchronous Mode (optional)
      4. 8.3.4  Precise Enable
      5. 8.3.5  Start-Up
      6. 8.3.6  Output Voltage Setting
        1. 8.3.6.1 Output Voltage Range
        2. 8.3.6.2 Output Voltage Setpoint
        3. 8.3.6.3 Non-Default Output Voltage Setpoint
        4. 8.3.6.4 Dynamic Voltage Scaling
        5. 8.3.6.5 Droop Compensation
      7. 8.3.7  Compensation (COMP)
      8. 8.3.8  Mode Selection / Clock Synchronization (MODE/SYNC)
      9. 8.3.9  Spread Spectrum Clocking (SSC)
      10. 8.3.10 Output Discharge
      11. 8.3.11 Undervoltage Lockout (UVLO)
      12. 8.3.12 Overvoltage Lockout (OVLO)
      13. 8.3.13 Overcurrent Protection
        1. 8.3.13.1 Cycle-by-Cycle Current Limiting
        2. 8.3.13.2 Hiccup Mode
        3. 8.3.13.3 Current-Limit Mode
      14. 8.3.14 Power Good (PG)
        1. 8.3.14.1 Standalone / Primary Device Behavior
        2. 8.3.14.2 Secondary Device Behavior
      15. 8.3.15 Remote Sense
      16. 8.3.16 Thermal Warning and Shutdown
      17. 8.3.17 Stacked Operation
    4. 8.4 Device Functional Modes
      1. 8.4.1 Power-On Reset
      2. 8.4.2 Undervoltage Lockout
      3. 8.4.3 Standby
      4. 8.4.4 On
    5. 8.5 Programming
      1. 8.5.1 Serial Interface Description
      2. 8.5.2 Standard-, Fast-, Fast-Mode Plus Protocol
      3. 8.5.3 HS-Mode Protocol
      4. 8.5.4 I2C Update Sequence
      5. 8.5.5 I2C Register Reset
      6. 8.5.6 Dynamic Voltage Scaling (DVS)
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Inductor Selection
        2. 9.2.2.2 Selecting the Input Capacitors
        3. 9.2.2.3 Selecting the Compensation Resistor
        4. 9.2.2.4 Selecting the Output Capacitors
        5. 9.2.2.5 Selecting the Compensation Capacitor CC
        6. 9.2.2.6 Selecting the Compensation Capacitor CC2
      3. 9.2.3 Application Curves
    3. 9.3 Typical Application - TPS6287BxV Devices
      1. 9.3.1 Design Requirements for TPS6287BxV
    4. 9.4 Typical Application Using Two TPS6287B25 in a Stacked Configuration
      1. 9.4.1 Design Requirements For Two Stacked Devices
      2. 9.4.2 Detailed Design Procedure
        1. 9.4.2.1 Selecting the Compensation Resistor
        2. 9.4.2.2 Selecting the Output Capacitors
        3. 9.4.2.3 Selecting the Compensation Capacitor CC
      3. 9.4.3 Application Curves for Two Stacked Devices
    5. 9.5 Typical Application Using Three TPS6287B25 in a Stacked Configuration
      1. 9.5.1 Application Curves
    6. 9.6 Power Supply Recommendations
    7. 9.7 Layout
      1. 9.7.1 Layout Guidelines
      2. 9.7.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Documentation Support
      1. 10.1.1 Related Documentation
    2. 10.2 Receiving Notification of Documentation Updates
    3. 10.3 Support Resources
    4. 10.4 Trademarks
    5. 10.5 Electrostatic Discharge Caution
    6. 10.6 Glossary
  12. 11Device Registers
  13. 12Revision History
  14. 13Mechanical, Packaging, and Orderable Information

Package Options

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

8.3.9 Spread Spectrum Clocking (SSC)

The device has a spread spectrum clocking function that can reduce electromagnetic interference (EMI). When the SSC function is active, the device modulates the switching frequency ±10% about the nominal value. The frequency modulation has a triangular characteristic (see Figure 8-11).

GUID-C29346A1-0B80-4EFA-BBBC-AAA1BAC804DF-low.svgFigure 8-11 Spread Spectrum Clocking Behavior

To use the SSC function, make sure that:

  • SSCEN = 1 in the CONTROL1 register
  • Forced-PWM operation is selected (MODE pin is high or FPWMEN = 1 in the CONTROL1 register)
  • The device is not synchronized to an external clock

To disable the SSC function, make sure that SCCEN = 0 in the CONTROL1 register.

To use the SSC function with multiple devices in a stacked configuration, make sure that the primary converter runs from the internal oscillator and synchronize all secondary converters to the primary clock (see Section 9.4).