LM3754_15 Datasheet, PDF (11/47 Pages) Texas Instruments – Scalable 2-Phase Synchronous Buck Controller with Integrated FET Drivers and Linear Regulator Controller

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LM3754
SNVS789B – JANUARY 2012 – REVISED APRIL 2013
Typical Performance Characteristics (continued)
Startup from 0V
Over-Voltage Fault
EN 2V/DIV
Over Voltage pulse
200 mV/DIV injected into FB
PGOOD 1V/DIV
V_OUT 500 mV/Div
SS 500 mV/DIV
VOUT 1.5V/DIV
2 ms/DIV
Figure 8.
Pre-Biased Output Startup
FB
500 mV/Div
2 ms/Div
Figure 9.
Repeated Over-Voltage Conditions
EN 2V/Div
Over Voltage pulse 200 mV/Div added to FB
SS 500 mV/Div
V_OUT 500 mV/Div
V_OUT = 600 mV
2 ms/Div
Figure 10.
Over-Current Fault (Soft Short)
V_OUT
0.5V/
Div
Figure 11.
FB
0.5V/
Div
10ms/Div
OC PULSE 5V/DIV
ILIM
OC
PULSE
R_ILIM V_OUT
R = 18
k
V_OUT
0.5V/DIV
2 ms/DIV
Figure 12.
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