SLUSDW9A June   2020  – June 2020 TPS51215A

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Typical Application
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
    1.     Pin 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  Switch Mode Power Supply Control
      2. 7.3.2  VREF, V0, V1, V2, V3 and Output Voltage
      3. 7.3.3  Soft-Start and Power Good
      4. 7.3.4  SLEW and VID Function
      5. 7.3.5  MODE Pin Configuration
      6. 7.3.6  Light-Load Operation
      7. 7.3.7  Out-of-Bound Operation
      8. 7.3.8  Current Sensing and Overcurrent Protection
      9. 7.3.9  Overvoltage and Undervoltage Protection
      10. 7.3.10 V5IN Undervoltage Lockout Protection
      11. 7.3.11 Thermal Shutdown
    4. 7.4 D-CAP2 Control Mode
  8. 8 Application and Implementation
    1. 8.1 Application Information
  9. 9 Typical Applications
    1. 9.1 Design Requirements
    2. 9.2 Detailed Design Procedure
      1. 9.2.1 Step One: Determine the Specifications
      2. 9.2.2 Step Two: Determine System Parameters
      3. 9.2.3 Step Three: Determine Inductor Value and Choose Inductor
      4. 9.2.4 Step Four: Set the Output Voltages
      5. 9.2.5 Step Five: Calculate SLEW Capacitance
      6. 9.2.6 Step Six
      7. 9.2.7 Step Seven: Determine the Output Capacitance
      8. 9.2.8 Step Eight: Select Decoupling and Peripheral Components
    3. 9.3 Application Examples
      1. 9.3.1 Design 1: 2-Bit VID ICC(max) = 30 A, DCAP2 600-kHz Application for VCCIN_AUX in Intel TigerLake platform
      2. 9.3.2 Design 2: 2-Bit VID, ICC(max) = 10 A, for VCCIO_1_2 in Intel RocketLake - S platform
    4. 9.4 Application Curves of Design 1
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Third-Party Products Disclaimer
    2. 12.2 Receiving Notification of Documentation Updates
    3. 12.3 Community Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  13. 13Mechanical, Packaging, and Orderable Information
    1. 13.1 Package Option Addendum
      1. 13.1.1 Packaging Information
      2. 13.1.2 Tape and Reel Information

パッケージ・オプション

メカニカル・データ（パッケージ｜ピン）
サーマルパッド・メカニカル・データ
発注情報

7.3.6 Light-Load Operation

In auto-skip mode, the TPS51215A SMPS control logic automatically reduces its switching frequency to improve light-load efficiency. To achieve this intelligence, a zero cross detection comparator is used to prevent negative inductor current by turning off the low-side MOSFET. Equation 3 shows the boundary load condition of this skip mode and continuous conduction operation.

Equation 3. TPS51215A q_iloadll_lusab9.gif