SLVSHC5B November   2023  – July 2024 TPS548D26

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1  Internal VCC LDO and Using an External Bias on the VCC and VDRV Pin
      2. 6.3.2  Input Undervoltage Lockout (UVLO)
        1. 6.3.2.1 Fixed VCC_OK UVLO
        2. 6.3.2.2 Fixed VDRV UVLO
        3. 6.3.2.3 Fixed PVIN UVLO
        4. 6.3.2.4 Enable
      3. 6.3.3  Set the Output Voltage
      4. 6.3.4  Differential Remote Sense and Feedback Divider
      5. 6.3.5  Start-Up and Shutdown
      6. 6.3.6  Loop Compensation
      7. 6.3.7  Set Switching Frequency and Operation Mode
      8. 6.3.8  Switching Node (SW)
      9. 6.3.9  Overcurrent Limit and Low-side Current Sense
      10. 6.3.10 Negative Overcurrent Limit
      11. 6.3.11 Zero-Crossing Detection
      12. 6.3.12 Input Overvoltage Protection
      13. 6.3.13 Output Undervoltage and Overvoltage Protection
      14. 6.3.14 Overtemperature Protection
      15. 6.3.15 Power Good
    4. 6.4 Device Functional Modes
      1. 6.4.1 Forced Continuous-Conduction Mode
      2. 6.4.2 Auto-Skip Eco-mode Light Load Operation
      3. 6.4.3 Powering the Device From a 12-V Bus
      4. 6.4.4 Powering the Device From a Split-Rail Configuration
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Application
      2. 7.2.2 Design Requirements
      3. 7.2.3 Detailed Design Procedure
        1. 7.2.3.1 Inductor Selection
        2. 7.2.3.2 Input Capacitor Selection
        3. 7.2.3.3 Output Capacitor Selection
        4. 7.2.3.4 VCC and VRDV Bypass Capacitor
        5. 7.2.3.5 BOOT Capacitor Selection
        6. 7.2.3.6 PG Pullup Resistor Selection
      4. 7.2.4 Application Curves
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
        1. 7.4.2.1 Thermal Performance on TPS548D26 Evaluation Board
  9. 8 Device and Documentation Support
    1. 8.1 Receiving Notification of Documentation Updates
    2. 8.2 Support Resources
    3. 8.3 Trademarks
    4. 8.4 Electrostatic Discharge Caution
    5. 8.5 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

3 Description

The TPS548D26 device is a highly integrated buck converter with D-CAP+ control topology for fast transient response. Because external compensation is not required, the device is easy to use and requires few external components. The device is well-designed for space-constrained data center applications.

The TPS548D26 device has true differential remote sense, high-performance integrated MOSFETs, and an accurate ±1%, 0.6V reference over the full operating junction temperature range. The device features fast load-transient response, accurate load regulation and line regulation, skip-mode or FCCM operation, and programmable soft-start time. Overcurrent, overvoltage, undervoltage, and overtemperature protections are provided with selectable hiccup or latch-off response.

The TPS548D26 device is a lead-free device and is RoHS compliant without exemption.

Package Information
PART NUMBERPACKAGE(1)PACKAGE SIZE(2)
TPS548D26 RXX (WQFN-FCRLF, 37)5.00mm × 6.00mm
(1) For more information, see Section 10.
(2) The package size (length × width) is a nominal value and includes pins, where applicable.
TPS548D26 Simplified SchematicSimplified Schematic
TPS548D26 Typical Efficiency
PVIN = 12VVCC = External 5V BiasVOUT = 0.76V
MODE = FCCM
Typical Efficiency