SLVSCB0E january   2014  – may 2023 TPS562200 , TPS563200

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 #GUID-10807E29-2FD4-4A3F-94B2-FDEBD147A133/SLVSC819633
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Timing Requirements
    7. 6.7 Typical Characteristics TPS562200
    8. 6.8 Typical Characteristics TPS563200
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 The Adaptive On-Time Control And PWM Operation
      2. 7.3.2 Advanced Eco-mode Control
      3. 7.3.3 Soft Start And Pre-Biased Soft Start
      4. 7.3.4 Current Protection
      5. 7.3.5 Over Voltage Protection
      6. 7.3.6 UVLO Protection
      7. 7.3.7 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 Normal Operation
      2. 7.4.2 Eco-mode Operation
      3. 7.4.3 Standby Operation
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 Tps562200 4.5-V To 17-V Input, 1.05-V Output Converter
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedures
          1. 8.2.1.2.1 Custom Design with WEBENCH® Tools
          2. 8.2.1.2.2 Output Voltage Resistors Selection
          3. 8.2.1.2.3 Output Filter Selection
          4. 8.2.1.2.4 Input Capacitor Selection
          5. 8.2.1.2.5 Bootstrap Capacitor Selection
        3. 8.2.1.3 Application Curves
      2. 8.2.2 Tps563200 4.5-V To 17-V Input, 1.05-V Output Converter
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedures
          1. 8.2.2.2.1 Output Filter Selection
        3. 8.2.2.3 Application Curves
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  9. 9 Device and Documentation Support
    1. 9.1 Device Support
      1. 9.1.1 Development Support
        1. 9.1.1.1 Custom Design with WEBENCH® Tools
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  10. 10Mechanical, Packaging, And Orderable Information

7.3.1 The Adaptive On-Time Control And PWM Operation

The main control loop of the TPS562200 and TPS563200 are adaptive on-time pulse width modulation (PWM) controller that supports a proprietary D-CAP2 control scheme. The D-CAP2 control scheme combines adaptive on-time control with an internal compensation circuit for pseudo-fixed frequency and low external component count configuration with both low ESR and ceramic output capacitors. It is stable even with virtually no ripple at the output.

At the beginning of each cycle, the high-side MOSFET is turned on. This MOSFET is turned off after internal one shot timer expires. This one shot duration is set inversely proportional to the converter input voltage, VIN, and proportional to the output voltage, VO, to maintain a pseudo-fixed frequency over the input voltage range, hence it is called adaptive on-time control. The one-shot timer is reset and the high-side MOSFET is turned on again when the feedback voltage falls below the reference voltage. An internal ramp is added to reference voltage to simulate output ripple, eliminating the need for ESR induced output ripple from D-CAP2 control scheme.