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