TPS54320_15 Datasheet, PDF (29/42 Pages) Texas Instruments – TPS54320 4.5- to 17-V Input, 3-A Synchronous Step Down SWIFT™ Converter

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EN = 1 V/div
V_OUT starting and stopping
from a 0.5 V pre-bias voltage
V_OUT = 1 V/div
t - Time - 2 ms/div
Figure 41. Startup and Shutdown With Prebias on EN
(1.1-Ω Load)
V_IN = 10 V/div
EN = 2 V/div
SS/TR = 1 V/div
V_OUT = 2 V/div
V_IN = 12 V
t - Time - 100 ms/div
Figure 43. Shutdown With EN (1.1-Ω Load)
V_IN = 200 mV/div (AC coupled)
Inductor current = 1 A/div
PH = 10 V/div
t - Time - 1 ms/div
Figure 45. Input Voltage Ripple (1.1-Ω Load)
TPS54320
SLVS982B – AUGUST 2010 – REVISED NOVEMBER 2014
V_IN = 10 V/div
EN = 2 V/div
SS/TR = 1 V/div
V_OUT = 2 V/div
t - Time - 2 ms/div
Figure 42. Shutdown With VIN (1.1-Ω Load)
V_OUT = 10 mV/div (AC coupled)
Inductor current = 1 A/div
PH = 10 V/div
t - Time - 1 ms/div
Figure 44. Output Voltage Ripple (1.1-Ω Load)
V_OUT = 2 V/div
Inductor current = 5 A/div
PH = 10 V/div
SS/TR = 1 V/div
t - Time - 20 ms/div
Load = 0.2 W
Figure 46. Overcurrent Hiccup Mode
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