SNVSBC5A December   2020  – December 2022 TPS548B28

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 External Bias On VCC Pin
      2. 7.3.2  Enable
      3. 7.3.3  Output Voltage Setting
        1. 7.3.3.1 Remote Sense
      4. 7.3.4  Internal Fixed Soft Start and External Adjustable Soft Start
      5. 7.3.5  External REFIN For Output Voltage Tracking
      6. 7.3.6  Frequency and Operation Mode Selection
      7. 7.3.7  D-CAP3™ Control Mode
      8. 7.3.8  Low-side FET Zero-Crossing
      9. 7.3.9  Current Sense and Positive Overcurrent Protection
      10. 7.3.10 Low-side FET Negative Current Limit
      11. 7.3.11 Power Good
      12. 7.3.12 Overvoltage and Undervoltage Protection
      13. 7.3.13 Out-Of-Bounds (OOB) Operation
      14. 7.3.14 Output Voltage Discharge
      15. 7.3.15 UVLO Protection
      16. 7.3.16 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 Auto-Skip Eco-mode™ Light Load Operation
      2. 7.4.2 Forced Continuous-Conduction Mode
      3. 7.4.3 Powering the Device From a 12-V Bus
      4. 7.4.4 Powering the Device From a 3.3-V Bus
      5. 7.4.5 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 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1  Output Voltage Setting Point
        2. 8.2.2.2  Choose the Switching Frequency and the Operation Mode
        3. 8.2.2.3  Choose the Inductor
        4. 8.2.2.4  Set the Current Limit (TRIP)
        5. 8.2.2.5  Choose the Output Capacitor
        6. 8.2.2.6  Choose the Input Capacitors (CIN)
        7. 8.2.2.7  Soft Start Capacitor (SS/REFIN Pin)
        8. 8.2.2.8  EN Pin Resistor Divider
        9. 8.2.2.9  VCC Bypass Capacitor
        10. 8.2.2.10 BOOT Capacitor
        11. 8.2.2.11 PGOOD Pullup Resistor
      3. 8.2.3 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 TI EVM
  9. 9 Device and Documentation Support
    1. 9.1 Documentation Support
      1. 9.1.1 Related Documentation
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  10. 10Mechanical, Packaging, and Orderable Information

Package Options

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

6.6 Typical Characteristics

GUID-20201203-CA0I-85KD-L8MF-4HSZQMLDNLHG-low.gifFigure 6-1 Efficiency vs Output Current, 12 VIN, 800 kHz, DCM, VCC = Int
GUID-20201203-CA0I-KMCP-R1QL-5VBP5VXVQ0DS-low.gifFigure 6-3 Efficiency vs Output Current, 12 VIN, 800 kHz, FCCM, VCC = Int
GUID-981308C1-270C-499B-BA36-C22B23BCCBF6-low.gif
Vin = 12 V Vout = 1 V Int Vcc
300 nH 800 kHz
Figure 6-5 Safe Operating Area, VOUT = 1.0 V
GUID-09D418E2-DA1C-4B4F-ADC1-263753035012-low.gif
Vin = 12 V Vout = 1 V Ext Vcc 3.3 V
300 nH 800 kHz
Figure 6-7 Safe Operating Area, VOUT = 1 V
GUID-20201203-CA0I-NSCX-L1ZC-ZMJKRNLGZ3PD-low.gifFigure 6-9 Switching Frequency vs Output Voltage
GUID-42700494-A02A-4629-A77E-DAA66ECE4071-low.gif
VIN = 12 V VEN = 0 V Internal VCC LDO
Figure 6-11 ISD(VIN) vs Junction Temperature
GUID-0375B4C6-0BE3-4ED2-9A7A-45A942AC716E-low.gif
VIN = 12 V
Figure 6-13 VINTREF vs Junction Temperature
GUID-20201203-CA0I-F5GG-LFJP-8QV3QLBZKCN0-low.gifFigure 6-2 Efficiency vs Output Current, 12 VIN, 800 kHz, DCM, VCC = EXT 3.3 V
GUID-20201203-CA0I-ZJ8R-DDNX-MXSCN7130KKD-low.gifFigure 6-4 Efficiency vs Output Current, 12 VIN, 800 kHz, FCCM, VCC = EXT 3.3 V
GUID-80D86620-4E3F-49FD-BD77-03A930BFC94D-low.gif
Vin = 12 V Vout = 5 V Int Vcc
800 nH 600 kHz
Figure 6-6 Safe Operating Area, VOUT = 5 V
GUID-6ACAC7FD-3260-4922-9F7F-EDC14572EB2E-low.gif
Vin = 12 V Vout = 5 V Ext Vcc 3.3 V
800 nH 600 kHz
Figure 6-8 Safe Operating Area, VOUT = 5 V
GUID-98E7F68D-50DA-4DEC-8EF9-EF95973E7C15-low.gifFigure 6-10 Output Voltage vs Output Current
GUID-B812DC66-B10D-407B-B6FB-F65D32097922-low.gif
VIN = 12 V IVCC = 2 mA
Figure 6-12 VCC LDO vs Junction Temperature
GUID-58F1E591-2D2E-45B1-900F-23699A0134AC-low.gif
VIN = 12 V
Figure 6-14 ISS(source) vs Junction Temperature