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

2.6 Loop Characteristics

Figure 2-6 shows the TPS56921EVM-188 loop-response characteristics when the output voltage is set by the external resistor divider network. Gain and phase plots are shown for VIN voltage of 12 V. Load current for the measurement is 4 A.

GUID-1E14F079-D0FB-472B-9B03-5C20973E131C-low.pngFigure 2-6 TPS56921EVM-188 Loop Response, VOUT Set by Resistor Divider

Figure 2-7 shows the TPS56921EVM-188 loop-response characteristics when the output voltage is set by the external resistor divider network. Gain and phase plots are shown for VIN voltage of 12 V. Load current for the measurement is 4 A.

GUID-2160A339-2649-4E09-83BF-3D9FC5CE8C19-low.pngFigure 2-7 TPS56921EVM-188 Loop Response, VOUT Set by I2C Interface