TIDT284 May   2022

 

  1.   Description
  2.   Features
  3.   Applications
  4. 1Test Prerequisites
    1. 1.1 Voltage and Current Requirements
    2. 1.2 Required Equipment
    3. 1.3 Considerations
    4. 1.4 Dimensions
  5. 2Testing and Results
    1. 2.1 Efficiency Graphs
    2. 2.2 Efficiency Data
    3. 2.3 Output Voltage Regulation
  6. 3Waveforms
    1. 3.1 Switching and Output Voltage Ripple
    2. 3.2 Start-Up
    3. 3.3 Shutdown

3.1 Switching and Output Voltage Ripple

The switching waveforms in Figure 3-1 through Figure 3-4 were measured by supplying the converters respectively at 3.8 V and 24 V in full load condition (300 mA and 150 mA).

GUID-20220428-SS0I-4DF5-M8GQ-NGXKJJRKMSDW-low.png
C2: VDS voltage of Q2 (50 V/div, 1 μs/div, no BWL)
C3: Output voltage (20 mV/div, 20-MHz BWL, AC coupling)
C4: Voltage on D5 anode (20 V/div, no BWL)
Figure 3-1 24 VIN to 12 VOUT Version
GUID-20220428-SS0I-NLFX-6KK4-ML5L2TSCZSLK-low.png
C2: VDS voltage of Q2 (50 V/div, 1 μs/div, no BWL)
C3: Output voltage (20 mV/div, 20-MHz BWL, AC coupling)
C4: Voltage on D5 anode (10 V/div, no BWL)
Figure 3-2 24 VIN to 6 VOUT Version
GUID-20220428-SS0I-LCGQ-L7SH-WNHTKWWXSB7R-low.png
C2: VDS voltage of Q2 (5 V/div, 1 μs/div, no BWL)
C3: Output voltage (20 mV/div, 20-MHz BWL, AC coupling)
C4: Voltage on D5 anode (20 V/div, no BWL)
Figure 3-3 3.8 VIN to 12 VOUT
GUID-20220428-SS0I-C1HD-MKP6-87PFPZM9P0S9-low.png
C2: Voltage on D5 anode (10 V/div, 1 μs/div, no BWL)
C3: Output voltage (20 mV/div, 20-MHz BWL, AC coupling)
C4: VDS voltage of Q2 (5 V/div, no BWL)
Figure 3-4 3.8 VIN to 6 VOUT