SLVU777A September   2012  – November 2021 TPS54020

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 Background
    2. 1.2 Performance Specification Summary
    3. 1.3 Modifications
      1. 1.3.1 Output Voltage Setpoint
      2. 1.3.2 Slow-Start Time
      3. 1.3.3 Adjustable UVLO
      4. 1.3.4 Input Voltage Rails
  3. 2Test Setup and Results
    1. 2.1  Input / Output Connections
    2. 2.2  Efficiency
    3. 2.3  Output Voltage Load Regulation
    4. 2.4  Output Voltage Line Regulation
    5. 2.5  Load Transient
    6. 2.6  Control Loop Response
    7. 2.7  Output Voltage Ripple
    8. 2.8  Input Voltage Ripple
    9. 2.9  Start Up
    10. 2.10 Pre-Bias Start Up
    11. 2.11 Hiccup Mode Current Limit
  4. 3Board Layout
    1. 3.1 Layout
  5. 4Schematic and Bill of Materials
    1. 4.1 Schematic
    2. 4.2 Bill of Materials
  6. 5Revision History

1.2 Performance Specification Summary

A summary of the EVM performance specifications is provided in Table 1-2. Specifications are given for an input voltage of VIN = 12 V and an output voltage of 1.8 V, unless otherwise specified. This EVM is designed and tested for VIN = 8 V to 17 V with the VIN and PVIN pins connect together with the jumper J2. The ambient temperature is 25°C for all measurements, unless otherwise noted.

Table 1-2 Performance Specifications
SPECIFICATIONTEST CONDITIONSMINTYPMAXUNIT
VIN voltage range (PVIN = VIN)81217V
VIN start voltage7.5V
VIN stop voltage7.1V
Output voltage set point1.8V
Output current rangeVIN = 8 V to 17 V010A
Line regulationIO = 5 A, VIN = 8 V to 17 V±0.3%
Load regulationVIN = 12 V, IO = 0 A to 10 A±0.5%
Load transient responseIO = 2.5 A to 47.5 AVoltage change–150mV
Recovery time200µS
IO = 47.5 A to 2.5 AVoltage change150mV
Recovery time200µS
Loop bandwidthVIN = 12 V, IO = 1.9 A30kHz
Phase marginVIN = 12 V , IO = 1.9 A60Degrees
Input ripple voltageIO = 10 A300mVpp
Output ripple voltageIO = 6 A18mVpp
Output rise time26mS
Operating frequency500kHz
Peak efficiencyTPS54020EVM-082, VIN = 12 V, IO = 5 A89%