SLUSAE6B December   2010  – November 2023 TPS53315

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1  D-CAP™ Integrated Circuit with Adaptive On-Time
      2. 6.3.2  Small Signal Model
      3. 6.3.3  Ramp Signal
      4. 6.3.4  Auto-Skip Eco-mode Light Load Operation
      5. 6.3.5  Adaptive Zero Crossing
      6. 6.3.6  Forced Continuous Conduction Mode
      7. 6.3.7  Power Good
      8. 6.3.8  Current Sense and Overcurrent Protection
      9. 6.3.9  Overvoltage and Undervoltage Protection
      10. 6.3.10 UVLO Protection
      11. 6.3.11 Thermal Shutdown
    4. 6.4 Device Functional Modes
      1. 6.4.1 Enable and Soft Start
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Typical Application Circuit Diagram
        1. 7.2.1.1 Design Requirements
        2. 7.2.1.2 Detailed Design Procedure
          1. 7.2.1.2.1 Step 1: Select Operation Mode and Soft-Start Time
          2. 7.2.1.2.2 Step 2: Select Switching Frequency
          3. 7.2.1.2.3 Step 3: Select the Inductance
          4. 7.2.1.2.4 Step 4: Select Output Capacitors
          5. 7.2.1.2.5 Step 5: Determine the Voltage-Divider Resistance (R1 and R2)
          6. 7.2.1.2.6 Step 6: Select the Overcurrent Resistance (RTRIP)
        3. 7.2.1.3 Application Curves
      2. 7.2.2 Typical Application Circuit Diagram With Ceramic Output Capacitors
        1. 7.2.2.1 Design Requirements
        2. 7.2.2.2 Detailed Design Procedure
          1. 7.2.2.2.1 Step 1: Select Operation Mode and Soft-Start Time
          2. 7.2.2.2.2 Step 2: Select Switching Frequency
          3. 7.2.2.2.3 Step 3: Select the Inductance
          4. 7.2.2.2.4 Step 4: Select Output Capacitance for Ceramic Capacitors
          5. 7.2.2.2.5 Step 5: Select the Overcurrent Setting Resistance (RTRIP)
        3. 7.2.2.3 External Component Selection When Using All Ceramic Output Capacitors
        4. 7.2.2.4 Application Curves
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
        1. 7.4.2.1 Thermal Considerations
  9. 8 Device and Documentation Support
    1. 8.1 Receiving Notification of Documentation Updates
    2. 8.2 Support Resources
    3. 8.3 Trademarks
    4. 8.4 Electrostatic Discharge Caution
    5. 8.5 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information
7.2.1.2.6 Step 6: Select the Overcurrent Resistance (RTRIP)

The overcurrent setting resistor, RTRIP, can be determined by Equation 10.

Equation 10. GUID-67BEF31C-E997-46A9-894C-9EEF12B0B739-low.gif

where

  • ITRIP is the TRIP pin sourcing current (10 µA)
  • RDS(on) is the thermally compensated on-time resistance value of the low-side MOSFET which is 7 mΩ