Datasheet

V = 20 mV / div (ac coupled)
OUT
Time = 1 µsec / div
PH = 5 V / div
Inductor Current = 2 A / div
V = 20 mV / div (ac coupled)
OUT
Time = 10 µsec / div
PH = 5 V / div
Inductor Current = 2 A / div
Test Setup and Results www.ti.com
When the inductor current falls to zero, Eco-mode™ operation begins. The TPS54329E enters a
power-saving skip mode. Switching resumes when the fedback voltage at VFB falls below an internally set
threshold. Figure 11 shows the switching activity as the circuit is just entering Eco-mode™ operation. The
effective switching period increases slightly as the pulse-skipping time is short.
In Figure 12, the load current is reduced further, and the skip time is longer.
Figure 11. TPS54429EEVM-608 Entering Eco-mode™ Operation
Figure 12. TPS54429EEVM-608 Fully in Eco-mode™ Operation
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TPS54429EEVM-608, 4.5-A, SWIFT™ Regulator— Evaluation Module SLVU444–March 2011
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