MP1495 – SYNCHRONOUS STEP-DOWN CONVERTER
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
Performance waveforms are tested on the evaluation board of the Design Example section.
VIN = 12V, VOUT = 3.3V, AAM=0.5V, TA = 25°C, unless otherwise noted.
Start up through Input
Voltage
Shutdown through Input
Voltage
I
=0A
I
=0A
OUT
OUT
V
V
EN
EN
5V/div.
5V/div.
V
/AC
OUT
100mV/div.
V
V
OUT
OUT
2V/div.
2V/div.
V
V
SW
SW
5V/div.
5V/div.
I
I
I
-inductor
2A/div.
OUT
-inductor
2A/div.
1A/div.
Start up through Input
Voltage
Shutdown through Input
Voltage
Startup through Enable
I
=0A
OUT
I
=3A
OUT
I
=3A
OUT
V
EN
5V/div.
V
V
EN
EN
5V/div.
5V/div.
V
OUT
2V/div.
V
V
OUT
OUT
2V/div.
2V/div.
V
SW
V
SW
V
SW
5V/div.
5V/div.
5V/div.
I
-inductor
2A/div.
I
I
-inductor
2A/div.
-inductor
2A/div.
Shuthdown through Enable
Startup through Enable
Shutdown through Enable
I
=0A
OUT
I
=3A
I
=3A
OUT
OUT
V
EN
V
V
EN
EN
5V/div.
5V/div.
5V/div.
V
OUT
V
V
OUT
OUT
2V/div.
2V/div.
2V/div.
V
V
SW
SW
V
SW
5V/div.
5V/div.
5V/div.
I
-inductor
2A/div.
I
I
-inductor
2A/div.
-inductor
2A/div.
MP1495 Rev. 1.04
12/26/2012
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5
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