Datasheet

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5.6 Light Load Operation (revision A PCB only)
TPS54383EVM Typical Performance Data and Characteristic Curves
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. Table 3
shows the typical output ripple over the range of light load currents.
Table 3. 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
SLUU285C – July 2007 – Revised January 2008 A 12-V Input, 5.0-V and 3.3-V Output, 2-A Non-Synchronous Buck Converter 15
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