5.6 Light Load Operation (revision A PCB only)
Under light load operation the TPS54383 controller can enter a pulse skipping mode when the inductor current
falls below 800 mA. Under this mode of operation the output ripple voltage will increase.
typical output ripple over the range of light load currents.
Table 5-1. Output Voltage Ripple verse Load Current at Light Load
LOAD CURRENT (A)
V
OUT1
RIPPLE (mV)
V
OUT2
RIPPLE (mV)
PULSE SKIPPING (Yes/No)
0.0
105
61
Yes
0.1
94
72
Yes
0.2
120
75
Yes
0.3
136
92
Yes
0.4
117
94
Yes
0.5
34
20
No
0.6
26
18
No
0.7
28
19
No
0.8
28
21
No
0.9
29
22
No
1.0
29
22
No
TPS54383EVM Typical Performance Data and Characteristic Curves
SLUU285D – JULY 2007 – REVISED OCTOBER 2021
TPS54383 Step-Down Converter Evaluation Module User's Guide
15
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