SLVU793A October   2012  – June 2021 TPS56921

 

  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 Transients
    6. 2.6 Loop Characteristics
    7. 2.7 Output Voltage Ripple
    8. 2.8 Input Voltage Ripple
    9. 2.9 Powering Up
  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 TPS56921EVM-188 performance specifications is provided in Table 1-2. Specifications are given for an input voltage of VIN = 12 V and an output voltage of 1.1 V, unless otherwise specified. The TPS56921EVM-188 is designed and tested for VIN = 4.5 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 TPS56921EVM-188 Performance Specification Summary
SPECIFICATIONTEST CONDITIONSMINTYPMAXUNIT
VIN voltage range (PVIN = VIN)4.51217V
VIN start voltage (internal UVLO)4.0V
VIN stop voltage (internal UVLO)3.85V
Output voltage setpoint1.1V
Output current rangeVIN = 8 V to 17 V09A
Line regulationIO = 4.5 A, VIN = 4.5 V to 17 V±0.01%
Load regulationVIN = 12 V, IO = 0 A to 9 A±0.18%
Load transient responseIO = 2.25 A to 6.75 AVoltage change–90mV
Recovery time100µs
IO = 6.75 A to 2.25 AVoltage change90mV
Recovery time100µs
Loop bandwidthVIN = 12 V, IO = 4 A50.1kHz
Phase marginVIN = 12 V , IO = 4 A63°
Input ripple voltageIO = 9 A, measured with 330 µF added capacitance at J2300mVPP
Output ripple voltageIO = 8 A10mVPP
Output rise time4ms
Operating frequency500kHz
Maximum efficiencyTPS56921EVM-188, VIN = 5 V, IO = 1.6 A88.1%