SLVU379A August   2010  – August 2021 TPS54521

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 Background
    2. 1.2 Performance Specification Summary
    3. 1.3 Modifications
      1. 1.3.1 Output Voltage Set Point
      2. 1.3.2 Slow-Start Time
      3. 1.3.3 Track In
      4. 1.3.4 Adjustable UVLO
      5. 1.3.5 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 Transients
    6. 2.6  Loop Characteristics
    7. 2.7  Output Voltage Ripple
    8. 2.8  Input Voltage Ripple
    9. 2.9  Powering Up
    10. 2.10 Hiccup Overcurrent Mode Operation
    11. 2.11 Thermal Characteristics
  4. 3Board Layout
    1. 3.1 Layout
    2. 3.2 Estimated Circuit Area
  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 TPS54521EVM-607 performance specifications is provided in Table 1-2. Specifications are given for an input voltage of 12 V and an output voltage of 3.3 V, unless otherwise specified. The TPS54521EVM-607 is designed and tested for VIN = 8 V to 17 V with the VIN and PVIN pins connected together with the JP1 jumper. The ambient temperature is 25°C for all measurements, unless otherwise noted.

Table 1-2 TPS54521EVM-607 Performance Specification Summary
SPECIFICATIONTEST CONDITIONSMINTYPMAXUNIT
VIN voltage range (PVIN = VIN)81217V
VIN start voltage6.806V
VIN stop voltage4.824V
Output voltage set point3.3V
Output current rangeVIN = 8 V to 17 V05A
Line regulationIO = 5 A, VIN = 8 V to 17 V

±0.04%

Load regulationVIN = 12 V, IO = 0 A to 5 A

±0.05%

Load transient responseIO = 2 A to 4 AVoltage change150mV
Recovery time6μs
IO = 4 A to 2 AVoltage change125mV
Recovery time6μs
Loop bandwidthVIN = 12 V, IO = 5 A42kHz
Phase marginVIN = 12 V , IO = 5 A62°
Input ripple voltageVIN = 12 V, IO = 5 A500mVPP
Output ripple voltageVIN = 12 V, IO = 5 A75mVPP
Output rise time3.5ms
Operating frequency480kHz
Maximum efficiencyTPS54521EVM-607, VIN = 8 V, IO = 1.1 A94.5%