SLVSEI1C June   2019  – October 2020 TPS62864 , TPS62866

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Options
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 I2C InterfaceTiming Characteristics
    7. 7.7 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Power Save Mode
      2. 8.3.2 Forced PWM Mode
      3. 8.3.3 Start-up
      4. 8.3.4 Switch Current Limit and HICCUP Short-Circuit Protection
      5. 8.3.5 Undervoltage Lockout (UVLO)
      6. 8.3.6 Thermal Warning and Shutdown
    4. 8.4 Device Functional Modes
      1. 8.4.1 Enable and Disable (EN)
      2. 8.4.2 Output Discharge
      3. 8.4.3 Start-up Output Voltage and I2C Slave Address Selection (VSET)
      4. 8.4.4 Select Output Voltage Registers (VID)
      5. 8.4.5 Power Good (PG)
    5. 8.5 Programming
      1. 8.5.1 Serial Interface Description
      2. 8.5.2 Standard-, Fast-, and 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. 8.6 Register Map
      1. 8.6.1 Slave Address Byte
      2. 8.6.2 Register Address Byte
      3. 8.6.3 VOUT Register 1
      4. 8.6.4 VOUT Register 2
      5. 8.6.5 CONTROL Register
      6. 8.6.6 STATUS Register
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 6-A Output Current Application
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
          1. 9.2.1.2.1 Custom Design With WEBENCH® Tools
          2. 9.2.1.2.2 Setting The Output Voltage
          3. 9.2.1.2.3 Output Filter Design
          4. 9.2.1.2.4 Inductor Selection
          5. 9.2.1.2.5 Capacitor Selection
        3. 9.2.1.3 Application Curves
      2. 9.2.2 Smaller Application Solution
        1. 9.2.2.1 Design Requirements
        2. 9.2.2.2 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
    3. 11.3 Thermal Considerations
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Third-Party Products Disclaimer
    2. 12.2 Documentation Support
      1. 12.2.1 Related Documentation
    3. 12.3 Support Resources
    4. 12.4 Receiving Notification of Documentation Updates
    5. 12.5 Trademarks
    6. 12.6 Electrostatic Discharge Caution
    7. 12.7 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

8.1 Overview

The TPS62864 and TPS62866 synchronous step-down converters use the DCS-Control (Direct Control with Seamless transition into Power Save Mode) topology. This is an advanced regulation topology that combines the advantages of hysteretic and current-mode control schemes.

The DCS-Control™ topology operates in PWM (pulse width modulation) mode for medium to heavy load conditions and in Power Save Mode at light load currents. In PWM mode, the converter operates with its nominal switching frequency of 2.4 MHz, having a controlled frequency variation over the input voltage range. Because DCS-Control supports both operation modes (PWM and PFM) within a single building block, the transition from PWM mode to Power Save Mode is seamless without affecting the output voltage. The devices offer both excellent DC voltage and superior load transient regulation, combined with very low output voltage ripple.