TIDT335 july   2023

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5. 1Test Prerequisites
    1. 1.1 Voltage and Current Requirements
    2. 1.2 PCB Properties
  6. 2Testing and Results
    1. 2.1 Efficiency and Thermals
  7. 3Waveforms
    1. 3.1 Start-Up Sequence
    2. 3.2 Switch Node
    3. 3.3 Output Voltage Ripple
    4. 3.4 Load Step

3.4 Load Step

Figure 3-7 through Figure 3-8 show the load step behavior waveforms of various devices.

GUID-20230428-SS0I-LRPS-1HZB-SX2MGX02VFX4-low.png
CH2: AC coupled output voltage, scale: 10 mV/div, 20 µs/div, 20-MHz bandwidth
CH3: Output current, scale: 1 A/div, 20 µs/div, 20-MHz bandwidth, 2 A offset: 0 V = 2 A
Figure 3-6 TPS62810-Q1 Load Step Behavior, 2 A to 4 A

GUID-20230428-SS0I-MCP5-LRZG-FHVMLP2JGWN4-low.png

CH2: AC coupled output voltage, scale: 50 mV/div, 100 µs/div, 20-MHz bandwidth
CH3: Output current, scale: 300 mA/div, 100 µs/div, 200-MHz bandwidth
Figure 3-7 LMR43620-Q1 Load Step Behavior, 300 mA to 600 mA
GUID-20230428-SS0I-JL1C-KSPQ-VRF411BKBTTK-low.png
CH2: AC coupled output voltage, scale: 10 mV/div, 20 µs/div, 20-MHz bandwidth
CH3: Output current, scale: 100 mA/div, 20 µs/div, 20-MHz bandwidth
Figure 3-8 TPS62850-Q1 Load Step Behavior, 150 mA to 300 mA