SLVSA86D March   2010  – October 2018 TPS54260

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Simplified Schematic
      2.      Efficiency vs Load 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 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 Output Current
      3. 7.3.3  Pulse-Skip Eco-Mode
      4. 7.3.4  Low-Dropout Operation and Bootstrap Voltage (BOOT)
      5. 7.3.5  Error Amplifier
      6. 7.3.6  Voltage Reference
      7. 7.3.7  Adjusting the Output Voltage
      8. 7.3.8  Enable and Adjusting Undervoltage Lockout
      9. 7.3.9  Slow-Start / Tracking Pin (SS/TR)
      10. 7.3.10 Overload Recovery Circuit
      11. 7.3.11 Sequencing
      12. 7.3.12 Constant Switching Frequency and Timing Resistor (RT/CLK Pin)
      13. 7.3.13 Overcurrent Protection and Frequency Shift
      14. 7.3.14 Selecting the Switching Frequency
      15. 7.3.15 How to Interface to RT/CLK Pin
      16. 7.3.16 Powergood (PWRGD Pin)
      17. 7.3.17 Overvoltage Transient Protection
      18. 7.3.18 Thermal Shutdown
      19. 7.3.19 Small Signal Model for Loop Response
      20. 7.3.20 Simple Small Signal Model for Peak Current Mode Control
      21. 7.3.21 Small Signal Model for Frequency Compensation
    4. 7.4 Device Functional Modes
      1. 7.4.1 Operation Near Minimum Input Voltage
      2. 7.4.2 Operation With Enable Control
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 3.3-V Output Application
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1  Custom Design With WEBENCH® Tools
          2. 8.2.1.2.2  Selecting the Switching Frequency
          3. 8.2.1.2.3  Output Inductor Selection (LO)
          4. 8.2.1.2.4  Output Capacitor
          5. 8.2.1.2.5  Catch Diode
          6. 8.2.1.2.6  Input Capacitor
          7. 8.2.1.2.7  Slow-Start Capacitor
          8. 8.2.1.2.8  Bootstrap Capacitor Selection
          9. 8.2.1.2.9  Undervoltage Lock Out Set Point
          10. 8.2.1.2.10 Output Voltage and Feedback Resistors Selection
          11. 8.2.1.2.11 Compensation
          12. 8.2.1.2.12 Discontinuous Mode and Eco-Mode Boundary
          13. 8.2.1.2.13 Power Dissipation Estimate
        3. 8.2.1.3 Application Curves
      2. 8.2.2 Inverting Power Supply
      3. 8.2.3 Split-Rail Power Supply
      4. 8.2.4 12-V to 3.8-V GSM Power Supply
      5. 8.2.5 24-V to 4.2-V GSM Power Supply
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Third-Party Products Disclaimer
      2. 11.1.2 Development Support
        1. 11.1.2.1 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

6.6 Typical Characteristics

TPS54260 C001_SLVS919.gif
VI = 12 V
Figure 1. On Resistance vs Junction Temperature
TPS54260 imax_tj_lvsa86.gif
VI = 12 V
Figure 3. Switch Current Limit vs Junction Temperature
TPS54260 C005_SLVS919.gif
VI = 12 V
TJ = 25°C
Figure 5. Switching Frequency vs RT/CLK Resistance High-Frequency Range
TPS54260 ea_tj_lvsa86.gifFigure 7. EA Transconductance During Slow-Start vs Junction Temperature
TPS54260 D001_SLVSA86.gif
VI = 12 V
Figure 9. EN Pin Voltage vs Junction Temperature
TPS54260 C011_SLVS919.gif
VI = 12 V
VI(EN) = Theshold – 50 mV
Figure 11. EN Pin Current vs Junction Temperature
TPS54260 ss_tr2_tj_lvsa86.gif
Figure 13. SS/TR Discharge Current vs Junction Temperature
TPS54260 C015_SLVS919.gif
VI = 12 V
Figure 15. Shutdown Supply Current vs Junction Temperature
TPS54260 icc2_tj_lva86.gifFigure 17. VIN Supply Current vs Junction Temperature
TPS54260 C019_SLVS919.gif
VI = 12 V
Figure 19. PWRGD On Resistance vs Junction Temperature
TPS54260 C021_SLVS919.gifFigure 21. BOOT-PH UVLO vs Junction Temperature
TPS54260 offset_vs_lva86.gifFigure 23. SS/TR to VSENSE Offset vs VSENSE
TPS54260 C002_SLVS919.gif
VI = 12 V
Figure 2. Voltage Reference vs Junction Temperature
TPS54260 C004_SLVS919.gif
VI = 12 V
RT = 200 kΩ
Figure 4. Switching Frequency vs Junction Temperature
TPS54260 C006_SLVS919.gif
VI = 12 V
TJ = 25°C
Figure 6. Switching Frequency vs RT/CLK Resistance Low-Frequency Range
TPS54260 ea2_tj_lvsa86.gifFigure 8. EA Transconductance vs Junction Temperature
TPS54260 C010_SLVS919.gif
VI = 12 V
VI(EN) = Theshold + 50 mV
Figure 10. EN Pin Current vs Junction Temperature
TPS54260 C012_SLVS919.gif
VI = 12 V
Figure 12. SS/TR Charge Current vs Junction Temperature
TPS54260 C014_SLVS919.gif
VI = 12 V
TJ = 25°C
Figure 14. Switching Frequency vs VSENSE
TPS54260 C016_SLVS919.gif
TJ = 25°C
Figure 16. Shutdown Supply Current vs Input Voltage (Vin)
TPS54260 icc_vi2_lva86.gifFigure 18. VIN Supply Current vs Input Voltage
TPS54260 C020_SLVS919.gif
VI = 12 V
Figure 20. PWRGD Threshold vs Junction Temperature
TPS54260 C022_SLVS919.gifFigure 22. Input Voltage (UVLO) vs Junction Temperature
TPS54260 offset_tj_lvsa86.gifFigure 24. SS/TR to VSENSE Offset vs Temperature