SLVSAE9F November   2010  – May 2019 TPS54618

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Simplified Schematic
      2.      Efficiency vs Output Current
  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 Timing Requirements
    7. 6.7 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  Fixed Frequency PWM Control
      2. 7.3.2  Slope Compensation and Output Current
      3. 7.3.3  Bootstrap Voltage (Boot) and Low Dropout Operation
      4. 7.3.4  Error Amplifier
      5. 7.3.5  Voltage Reference
      6. 7.3.6  Adjusting the Output Voltage
      7. 7.3.7  Enable and Adjusting Undervoltage Lockout
      8. 7.3.8  Soft-Start Pin
      9. 7.3.9  Sequencing
      10. 7.3.10 Constant Switching Frequency and Timing Resistor (RT/CLK Pin)
      11. 7.3.11 Overcurrent Protection
      12. 7.3.12 Frequency Shift
      13. 7.3.13 Reverse Overcurrent Protection
      14. 7.3.14 Synchronize Using the RT/CLK Pin
      15. 7.3.15 Power Good (PWRGD Pin)
      16. 7.3.16 Overvoltage Transient Protection
      17. 7.3.17 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 Simple Small Signal Model for Peak Current Mode Control
      2. 7.4.2 Small Signal Model for Frequency Compensation
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Custom Design With WEBENCH® Tools
        2. 8.2.2.2 Step One: Select the Switching Frequency
        3. 8.2.2.3 Step Two: Select the Output Inductor
        4. 8.2.2.4 Step Three: Choose the Output Capacitor
        5. 8.2.2.5 Step Four: Select the Input Capacitor
        6. 8.2.2.6 Step Five: Choose the Soft-Start Capacitor
        7. 8.2.2.7 Step Six: Select the Bootstrap Capacitor
        8. 8.2.2.8 Step Eight: Select Output Voltage and Feedback Resistors
          1. 8.2.2.8.1 Output Voltage Limitations
        9. 8.2.2.9 Step Nine: Select Loop Compensation Components
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
    3. 10.3 Power Dissipation Estimate
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Developmental Support
      2. 11.1.2 Custom Design With WEBENCH® Tools
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Community Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

6.7 Typical Characteristics

TPS54618 radson_tj_lvsae9.gifFigure 1. High-Side and Low-Side ON-Resistance
vs Junction Temperature
TPS54618 hi_swt_tj2_lvsae9.gifFigure 3. High-Side Current Limit vs Junction Temperature
TPS54618 fs3_RT_lvsae9.pngFigure 5. Switching Frequency vs RT Resistance
Low Frequency Range
TPS54618 AE_tj_lvsae9.gifFigure 7. Transconductance vs Junction Temperature
TPS54618 thresh_tj_lvsae9.gifFigure 9. Enable Pin Voltage vs Junction Temperature
TPS54618 EN2_pin_tj_lvsae9.gifFigure 11. EN Pin Current vs Junction Temperature
TPS54618 vi_tj_lvsae9.gifFigure 13. Input Voltage vs Junction Temperature
TPS54618 shutdwn_vi_lvsae9.gifFigure 15. Shutdown Supply Current vs Input Voltage
TPS54618 Ivin_vi_lvsae9.gifFigure 17. Supply Current vs Input Voltage
TPS54618 radson2_tj_lvsae9.gifFigure 19. PWRGD ON-Resistance
vs Junction Temperature
TPS54618 eff1_lvsae9.gifFigure 21. Efficiency vs Load Current
TPS54618 eff3_lvsae9.gifFigure 23. Efficiency vs Load Current
TPS54618 fs_tj_lvsae9.gifFigure 2. Switching Frequency vs Junction Temperature
TPS54618 vref_tj_lvsae9.gifFigure 4. Voltage Reference vs Junction Temperature
TPS54618 fs_vsense_lvsae9.gifFigure 6. Switching Frequency vs Vsense
TPS54618 SS_tj_lvsae9.gifFigure 8. Transconductance (Soft-Start)
vs Junction Temperature
TPS54618 EN_pin_tj_lvsae9.gifFigure 10. EN Pin Current vs Junction Temperature
TPS54618 Iss_tj_lvsae9.gifFigure 12. Charge Current vs Junction Temperature
TPS54618 shutdwn_tj_lvsae9.gifFigure 14. Shutdown Supply Current
vs Junction Temperature
TPS54618 Ivin_tj_lvsae9.gifFigure 16. Supply Current vs Junction Temperature
TPS54618 PWRGD_tj_lvsae9.gifFigure 18. PWRGD Threshold vs Junction Temperature
TPS54618 SSTR_tj_lvsae9.gifFigure 20. SS/TR to VSENSE Offset
vs Junction Temperature
TPS54618 eff2_lvsae9.gifFigure 22. Efficiency vs Load Current
TPS54618 eff4_lvsae9.gifFigure 24. Efficiency vs Load Current