SLVUD71 June   2025 TPS544B28

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   Applications
  6.   6
  7. 1Evaluation Module Overview
    1. 1.1 Introduction
      1. 1.1.1 Before You Begin
    2. 1.2 Kit Contents
    3. 1.3 Specifications
    4. 1.4 Device Information
  8. 2Hardware
    1. 2.1 Test Equipment
      1. 2.1.1 Voltage Source
      2. 2.1.2 Oscilloscope
      3. 2.1.3 Multimeters
      4. 2.1.4 Output Load
      5. 2.1.5 Fan
      6. 2.1.6 USB-to-GPIO Interface Adapter
      7. 2.1.7 Recommended Wire Gauge
      8. 2.1.8 List of Test Points, Jumpers, and Connectors
    2. 2.2 Test Setup
      1. 2.2.1 Test and Configuration Software
        1. 2.2.1.1 Description
        2. 2.2.1.2 Features
  9. 3Software
    1. 3.1 EVM Configuration Using the Fusion GUI
      1. 3.1.1 Configuration Procedure
    2. 3.2 Using the Fusion GUI
      1. 3.2.1 Opening the Fusion GUI
      2. 3.2.2 Changing ON_OFF_CONFIG
      3. 3.2.3 Pin Strapping
      4. 3.2.4 All Config
      5. 3.2.5 Monitor
      6. 3.2.6 Status
  10. 4Implementation Results
    1. 4.1 Test Procedure
      1. 4.1.1 Line and Load Regulation and Efficiency Measurement Procedure
      2. 4.1.2 Efficiency Measurement Test Points
      3. 4.1.3 Control Loop Gain and Phase Measurement Procedure
    2. 4.2 Performance Data and Typical Characteristic Curves
      1. 4.2.1 Efficiency
      2. 4.2.2 Load Regulation
      3. 4.2.3 Line Regulation
      4. 4.2.4 Output Ripple
      5. 4.2.5 Control On
      6. 4.2.6 Control Off
      7. 4.2.7 Thermal Image
  11. 5Hardware Design Files
    1. 5.1 Schematic
    2. 5.2 EVM Assembly Drawing and PCB Layout
    3. 5.3 Bill of Materials
  12. 6Additional Information
    1. 6.1 Trademarks

1.3 Specifications

The following table lists the electrical performance specifications in room temperature (20°C to 25°C). Characteristics are given for an input voltage of VIN = 12V, VOUT = 1V, FSW = 800kHz, FCCM unless otherwise specified.

Table 1-2 TPS544B28RBHEVM Electrical Performance Specifications
Parameter(1) Test Conditions MIN TYP MAX Unit
Input Characteristics
Input voltage range, VIN 8 12 16 V
Full load input current IOUT = 20A 1.98 A
VIN = 8V, IOUT = 20A 2.95 A
No load input current IOUT = 0A, switching enabled 22.2 mA
Output Characteristics
Output voltage, VOUT 1 V
Output load current, IOUT 0 20 A
Output voltage regulation Line regulation: VIN = 8V to 16V, IOUT = 20A 0.5 mV
Load regulation: IOUT = 0A to 20A 0.65 mV
Output voltage ripple IOUT = 20A 4 mV
VOUT output overcurrent fault threshold Programmed by MS1/ PMBus 21 A
Systems Characteristics
Switching frequency Programmed by MS1/PMBus 800 kHz
Full load efficiency IOUT = 20A 84.3 %
Peak efficiency IOUT = 7A 90 %
Operating case temperature IOUT = 20A, 15-minute soak 79.5 °C
PMBus Interface and Pin Strapping
PMBus address Programmed by ADR JP4 pins 1 – 2 shorted 2E Hex
Voltage reference Programmed by MS2/PMBus 1 V
Soft-start time (TON_RISE) Programmed by MS1/PMBus 4 ms
(1) The efficiency is measured using the test points listed in Table 4-1 to minimize the effect of DC drops caused by on-board copper traces.