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

3.6 Shutdown Sequence

The following waveforms shows the shutdown sequence for this reference design.

GUID-20220221-SS0I-ZSPR-LJZB-CW0L5BCWTNPM-low.jpg Figure 3-13 Shutdown at 8-V Input Voltage

VIN (blue curve)

  • 5 V / div
  • 20-MHz bandwidth

VOUT

  • 2 V / div
  • 20-MHz bandwidth

1 ms / div

GUID-20220221-SS0I-GJVJ-PZJX-PMXFTXRRRZ79-low.jpg Figure 3-14 Shutdown at 18-V Input Voltage

VIN (blue curve)

  • 5 V / div
  • 20-MHz bandwidth

VOUT

  • 2 V / div
  • 20-MHz bandwidth

1 ms / div