SLVSF00 January   2019 TPS54560B

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 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 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  Adjusting the Output Voltage
      7. 7.3.7  Enable and Adjusting Undervoltage Lockout
      8. 7.3.8  Internal Soft Start
      9. 7.3.9  Constant Switching Frequency and Timing Resistor (RT/CLK) pin)
      10. 7.3.10 Accurate Current-Limit Operation and Maximum Switching Frequency
      11. 7.3.11 Synchronization to RT/CLK pin
      12. 7.3.12 Overvoltage Protection
      13. 7.3.13 Thermal Shutdown
      14. 7.3.14 Small Signal Model for Loop Response
      15. 7.3.15 Simple Small Signal Model for Peak-Current-Mode Control
      16. 7.3.16 Small Signal Model for Frequency Compensation
    4. 7.4 Device Functional Modes
      1. 7.4.1 Operation with VIN < 4.5 V (Minimum VIN)
      2. 7.4.2 Operation with EN Control
  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  Selecting the Switching Frequency
        3. 8.2.2.3  Output Inductor Selection (LO)
        4. 8.2.2.4  Output Capacitor
        5. 8.2.2.5  Catch Diode
        6. 8.2.2.6  Input Capacitor
        7. 8.2.2.7  Bootstrap Capacitor Selection
        8. 8.2.2.8  Undervoltage Lockout Setpoint
        9. 8.2.2.9  Output Voltage and Feedback Resistors Selection
        10. 8.2.2.10 Minimum Input Voltage, VIN
        11. 8.2.2.11 Compensation
        12. 8.2.2.12 Discontinuous Conduction Mode and Eco-mode Boundary
        13. 8.2.2.13 Power Dissipation Estimate
        14. 8.2.2.14 Safe Operating Area
      3. 8.2.3 Application Curves
    3. 8.3 Other System Examples
      1. 8.3.1 Inverting Power
      2. 8.3.2 Split-Rail Power Supply
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Examples
    3. 10.3 Estimated Circuit Area
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Third-Party Products Disclaimer
      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
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

8.2.3 Application Curves

TPS54560B ac_G001_lvsbn0.gifFigure 37. Load Transient
TPS54560B ac_G003_lvsbn0.gifFigure 39. Start-up With VIN
TPS54560B ac_G005_lvsbn0.gif
Figure 41. Output Ripple CCM
TPS54560B ac_G007_lvsbn0.gif
No Load
Figure 43. Output Ripple PSM
TPS54560B ac_G009_lvsbn0.gif
IOUT = 100 mA
Figure 45. Input Ripple DCM
TPS54560B C100_SLVSBN0.png
VOUT = 5 V ƒsw = 400 kHz
Figure 47. Efficiency vs Load Current
TPS54560B C102_SLVSBN0.png
VOUT = 3.3 V ƒsw = 400 kHz
Figure 49. Efficiency vs Load Current
TPS54560B C099_SLVSBN0.png
V = 12 V
Figure 51. Efficiency vs Output Current
TPS54560B C103_SLVSBN0.png
VIN = 12 V VOUT = 5 V ƒsw = 400 kHz
Figure 53. Regulation vs Load Current
TPS54560B ac_G002_lvsbn0.gifFigure 38. Line Transient (8 V to 40 V)
TPS54560B ac_G004_lvsbn0.gifFigure 40. Start-up With EN
TPS54560B ac_G006_lvsbn0.gif
IOUT = 100 mA
Figure 42. Output Ripple DCM
TPS54560B ac_G008_lvsbn0.gif
Figure 44. Input Ripple CCM
TPS54560B ac_G010_lvsbn0.gif
No Load EN Floating
Figure 46. Low Dropout Operation
TPS54560B C101_SLVSBN0.png
VOUT = 5 V ƒsw = 400 kHz
Figure 48. Light Load Efficiency
TPS54560B C104_SLVSBN0.png
VOUT = 3.3 V ƒsw = 400 kHz
Figure 50. Light Load Efficiency
TPS54560B C001_SLVSBN0.png
VIN = 12 V VOUT = 5 V IOUT = 5 A
Figure 52. Overall Loop Frequency Response
TPS54560B C105_SLVSBN0.png
VOUT = 5 V IOUT = 5 A ƒsw = 400 kHz
Figure 54. Regulation vs Input Voltage