TIDT274 April   2022

 

  1.   Description
  2.   Features
  3.   Applications
  4. 1Test Prerequisites
    1. 1.1 Voltage and Current Requirements
    2. 1.2 Considerations
    3. 1.3 Dimensions
  5. 2Testing and Results
    1. 2.1 Efficiency Graphs
    2. 2.2 Load Regulation
    3. 2.3 Thermal Images
    4. 2.4 Bode Plots
  6. 3Waveforms
    1. 3.1 Switching
      1. 3.1.1 Switchnode to GND
      2. 3.1.2 Switchnode to –VOUT
    2. 3.2 Input Voltage Ripple
    3. 3.3 Output Voltage Ripple
    4. 3.4 Load Transients
    5. 3.5 Start-Up Sequence
    6. 3.6 Shutdown Sequence

1.2 Considerations

Remember the following considerations while working with this design:

  • The measured switching frequency is around 280 kHz
  • The circuit starts up at an input voltage of 4.4 V
  • Unless otherwise mentioned, the test was done with a input voltage of 5.2 V and output current was adjusted to 0.12 A with a resistor
  • For availability reasons, this design was tested using the Coilcraft MSS1260-333 (33 μH)
  • The Coilcraft XGL6060-333 is recommended for the smallest board space