SLVU944B October   2015  – October 2020 TPS7H1101-SP

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 Related Documentation
  3. 2Description
  4. 3Test Setup
    1. 3.1 Equipment
      1. 3.1.1 Power Supplies
      2. 3.1.2 Load Number 1
      3. 3.1.3 Meters
      4. 3.1.4 Oscilloscope
    2. 3.2 Bench Test Setup Conditions
      1. 3.2.1 Headers Description and Jumper Placement
      2. 3.2.2 Testing
    3. 3.3 Power-Up Procedure
      1. 3.3.1  IOUT and VOUT Measurements
      2. 3.3.2  Output Current Limiting
      3. 3.3.3  High-Side Current Sense
      4. 3.3.4  Current Foldback
      5. 3.3.5  Power Good
      6. 3.3.6  Dropout Voltage
      7. 3.3.7  Transient Response
      8. 3.3.8  Current Sharing
      9. 3.3.9  Soft-Start
      10. 3.3.10 Enable and Disable
      11. 3.3.11 Turn-Off
  5. 4Board Layout
    1. 4.1 EVM Layout Flexibility
  6. 5Schematic and Bill of Materials
  7.   Revision History

3.3.6 Dropout Voltage

Drop out voltage (VDO) is the difference between the input voltage and output voltage needed to maintain regulation. VDO vs IOUT is highlighted in Figure 3-6.

GUID-02E980EB-5B5C-4946-BEEC-C1D851CC2A37-low.gifFigure 3-6 VDO vs IOUT