TIDT225 March   2021

 

  1. 1Description
  2. 2Test Prerequisites
    1. 2.1 Voltage and Current Requirements
    2. 2.2 Required Equipment
  3. 3Testing and Results
    1. 3.1 Thermal Images
    2. 3.2 Efficiency and Power Dissipation Graphs
    3. 3.3 Efficiency and Power Dissipation Data
    4. 3.4 Cross Regulation
    5. 3.5 Loop Gain
  4. 4Waveforms
    1. 4.1 Start-up
    2. 4.2 Switching Waveforms
    3. 4.3 Output Voltage Ripple
    4. 4.4 Load Transients

3.4 Cross Regulation

This image shows the output voltage regulation with various 100% and 50% loading combinations with the input voltage set to 12 V.

Voltage regulation is optimally balanced between the +18 V and –5.1V when loaded equally. TI recommends keeping the load imbalance between the +18 V and the –5.1 V to less than 25% to minimize power dissipation in the output Zener diodes.

GUID-20210219-CA0I-CPFS-L0LK-6LVBWVTCP0HQ-low.png Figure 3-6 Output Voltage Regulation