TIDT260 March   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 Line Regulation
    4. 2.4 Thermal Images
      1. 2.4.1 8-V Input Voltage
      2. 2.4.2 18-V Input Voltage
    5. 2.5 Bode Plots
  6. 3Waveforms
    1. 3.1 Switching
    2. 3.2 Output Voltage Ripple
    3. 3.3 Input Voltage Ripple
    4. 3.4 Load Transients
    5. 3.5 Start-Up Sequence
    6. 3.6 Shutdown Sequence
    7. 3.7 Spread Spectrum Feature

3.5 Start-Up Sequence

Start-up behavior is shown in the following figures.

GUID-20220221-SS0I-KNSB-VDDC-C2NCL81PZKKH-low.jpgFigure 3-11 9-V Input Voltage (UVLO set to 9.0 V ON and 7.3 V OFF)

VIN (blue curve)

  • 5-V / div
  • 20-MHz bandwidth

VOUT

  • 2 V / div
  • 20-MHz bandwidth

2 ms / div

GUID-20220221-SS0I-JF04-SLWF-V6W635TNKN00-low.jpg Figure 3-12 Start-up at 18-V Input Voltage

VIN (blue curve)

  • 5-V / div
  • 20-MHz bandwidth

VOUT

  • 2 V / div
  • 20-MHz bandwidth

2 ms / div