TIDT329 june   2023

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5. 1Test Prerequisites
    1. 1.1 Voltage and Current Requirements
    2. 1.2 Considerations
    3. 1.3 Dimensions
  6. 2Testing and Results
    1. 2.1 Efficiency Graph
    2. 2.2 Efficiency Data
    3. 2.3 Bode Plots
  7. 3Waveforms
    1. 3.1 Switching
      1. 3.1.1 2.7-V Input Voltage
      2. 3.1.2 2.1-V Input Voltage
      3. 3.1.3 1.5-V Input Voltage
    2. 3.2 Output Voltage Ripple
    3. 3.3 Load Transients
      1. 3.3.1 0.2-A to 2.2-A Load Transient
      2. 3.3.2 2-A to 4.5-A Load Transient
    4. 3.4 Start-Up Sequence

1.2 Considerations

  • The lab power supply must be connected to the PCB with very short cables (≤ 30 cm) to avoid resonances between the output of the lab power supply and the input circuit on the printed circuit board (PCB), which can influence the look and results of the frequency response analysis.
  • Measurements have been executed with additional low ESR input bulk capacitance to lower the input impedance (3 × EEFSX0G221ER, no footprint on PCB).
  • Target a minimum copper thickness on the PCB of 70 µm. The tested PCB, however, only had 35 µm due to worldwide supply bottlenecks.
  • Measurements, including efficiency, were taken with forced air cooling.