TIDT261 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 4-V Input Voltage
        1. 2.4.1.1 3-A Output Current – Average Load Current
        2. 2.4.1.2 5-A Output Current – Peak Load Current
      2. 2.4.2 12-V Input Voltage
        1. 2.4.2.1 3-A Output Current
        2. 2.4.2.2 5-A Output Current
      3. 2.4.3 18-V Input Voltage
        1. 2.4.3.1 3-A Output Current
        2. 2.4.3.2 5-A Output Current
    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

3.3 Input Voltage Ripple

Input voltage ripple (AC coupled) is shown in the following figures.

GUID-20220224-SS0I-QNXC-QG2B-BNFMCHDVD1TX-low.jpg
50-mV / div, 20-MHz bandwidth, 2-µs / div
Figure 3-15 Input Voltage Ripple (4 VIN)
GUID-20220224-SS0I-CCT1-MFWS-686K6QR9MSJ2-low.jpg
50-mV / div, 20-MHz bandwidth, 2-µs / div
Figure 3-16 Input Voltage Ripple (12 VIN)
GUID-20220224-SS0I-FGWT-3K2M-C3HPH4BHJ27F-low.jpg
50-mV / div, 20-MHz bandwidth, 2-µs / div
Figure 3-17 Input Voltage Ripple (18 VIN)