SLVSGM2 March   2023 TPS548C26

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and 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  Internal VCC LDO and Using an External Bias on VCC and VDRV Pin
      2. 7.3.2  Input Undervoltage Lockout (UVLO)
        1. 7.3.2.1 Fixed VCC_OK UVLO
        2. 7.3.2.2 Fixed VDRV UVLO
        3. 7.3.2.3 Fixed PVIN UVLO
        4. 7.3.2.4 Enable
      3. 7.3.3  Set the Output Voltage
      4. 7.3.4  Differential Remote Sense and Feedback Divider
      5. 7.3.5  Start-up and Shutdown
      6. 7.3.6  Loop Compensation
      7. 7.3.7  Set Switching Frequency and Operation Mode
      8. 7.3.8  Switching Node (SW)
      9. 7.3.9  Overcurrent Limit and Low-side Current Sense
      10. 7.3.10 Negative Overcurrent Limit
      11. 7.3.11 Zero-Crossing Detection
      12. 7.3.12 Input Overvoltage Protection
      13. 7.3.13 Output Undervoltage and Overvoltage Protection
      14. 7.3.14 Overtemperature Protection
      15. 7.3.15 Power Good
    4. 7.4 Device Functional Modes
      1. 7.4.1 Forced Continuous-Conduction Mode
      2. 7.4.2 Auto-Skip Eco-mode Light Load Operation
      3. 7.4.3 Powering the Device from a 12-V Bus
      4. 7.4.4 Powering the Device From a Split-rail Configuration
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Application
      2. 8.2.2 Design Requirements
      3. 8.2.3 Detailed Design Procedure
        1. 8.2.3.1 Inductor Selection
        2. 8.2.3.2 Input Capacitor Selection
        3. 8.2.3.3 Output Capacitor Selection
        4. 8.2.3.4 VCC and VRDV Bypass Capacitor
        5. 8.2.3.5 BOOT Capacitor Selection
        6. 8.2.3.6 PG Pullup Resistor Selection
      4. 8.2.4 Application Curves
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
        1. 8.4.2.1 Thermal Performance on TPS548C26 Evaluation Board
  9. 9 Device and Documentation Support
    1. 9.1 Receiving Notification of Documentation Updates
    2. 9.2 Support Resources
    3. 9.3 Trademarks
    4. 9.4 Electrostatic Discharge Caution
    5. 9.5 Glossary
  10. 10Mechanical, Packaging, and Orderable Information

Package Options

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

8.2.4 Application Curves

PVIN = 12 VVOUT = 1.1 V
Figure 8-2 Efficiency, FCCM, Internal LDO
PVIN = 12 VVOUT = 1.1 V
Figure 8-4 Efficiency, FCCM, External 5-V Bias
PVIN = 12 VVOUT = 1.1 V
Figure 8-6 Efficiency, DCM, External 5-V Bias
PVIN = 12 VVOUT = 3.3 V
No DC Load Line (DCLL)
Figure 8-8 Load Regulation, FCCM, Internal LDO
PVIN = 12 VVOUT = 3.3 V
No DC Load Line (DCLL)
Figure 8-10 Load Regulation, DCM, Internal VCC LDO
GUID-20221102-SS0I-JG6P-CGRW-0JCMFC2N8DBJ-low.pngFigure 8-12 ENABLE Start-Up Waveform, PVIN = 12 V, VOUT = 1.8 V
GUID-20221102-SS0I-XCGZ-W0CQ-H7ZCMWBGFHVJ-low.pngFigure 8-14 Output Voltage Ripple, 800 kHz FCCM, 35 A Load, PVIN = 12 V, VOUT = 3.3 V
GUID-20221102-SS0I-2X7W-CKZT-FTVHCB4SPWGR-low.pngFigure 8-16 Output Voltage Ripple, DCM, No load, PVIN = 12 V, VOUT = 3.3 V
PVIN = 12 VVOUT = 1.1 V
Figure 8-3 Power Dissipation, FCCM, Internal LDO
PVIN = 12 VVOUT = 1.1 V
Figure 8-5 Power Dissipation, FCCM, External 5-V Bias
PVIN = 12 VVOUT = 1.1 V
Figure 8-7 Power Dissipation, DCM, External 5-V Bias
PVIN = 12 VVOUT = 3.3 V
No DC Load Line (DCLL)
Figure 8-9 Load Regulation, FCCM, External 5-V Bias
PVIN = 12 VVOUT = 3.3 V
No DC Load Line (DCLL)
Figure 8-11 Load Regulation, DCM, External 5-V Bias
GUID-20221102-SS0I-LW0T-G1XH-ZXFDSDTM8BJZ-low.pngFigure 8-13 ENABLE Shutdown Waveform, PVIN = 12 V, VOUT = 1.8 V
GUID-20221102-SS0I-PCGP-JFR9-1VWN7LKWQSF8-low.pngFigure 8-15 Output Voltage Ripple, 800 kHz FCCM, No load, PVIN = 12 V, VOUT = 3.3 V