SLVU380A September   2010  – October 2021 TPS54320

 

  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 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 TPS54320 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 TPS54320 is designed and tested for VIN = 8 V to 17 V with the VIN and PVIN pins connect together with the JP1 jumper. The ambient temperature is 25°C for all measurements, unless otherwise noted.

Table 1-2 TPS54320 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 V03A
Line regulationIO = 3 A, VIN = 8 V to 17 V± 0.02%
Load regulationVIN = 12 V, IO = 0 A to 3 A± 0.02%
Load transient responseIO = 0.75 A to 1.5 AVoltage change90mV
Recovery time70μs
IO = 1.5 A to 0.75 AVoltage change80mV
Recovery time70μs
Loop bandwidthVIN = 12 V, IO = 3 A32.1kHz
Phase marginVIN = 12 V , IO = 3 A82°
Input ripple voltageIO = 3 A480mVPP
Output ripple voltageIO = 3 A10mVPP
Output rise time3.5ms
Operating frequency480kHz
Maximum efficiencyTPS54320EVM-513, VIN = 8 V, IO = 0.9 A94.9%