MP1586 – 3A, 28V, 50kHz TO 400kHz STEP-DOWN CONVERTER
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
VIN = 12V, VOUT=5V, FSW=250kHz, C1 = 10µF, C2 = 2×22µF, L1 = 22µH, and TA = +25°C, unless
otherwise noted.
Steady State
Steady State
Steady State
I
=0.1A
I
=1A
I
=3A
OUT
OUT
OUT
V
/AC
OUT
V
/AC
OUT
V
/AC
OUT
10mV/div.
10mV/div.
10mV/div.
V
V
V
SW
SW
SW
10V/div.
10V/div.
10V/div.
I
I
L
L
1A/div.
1A/div.
I
L
2A/div.
EN Startup
EN Startup
EN Startup
I
=0.1A
I
=1A
I
=3A
OUT
OUT
OUT
V
V
V
OUT
OUT
OUT
2V/div.
2V/div.
2V/div.
V
V
V
EN
EN
EN
5V/div.
5V/div.
5V/div.
V
V
V
SW
SW
SW
10V/div.
10V/div.
10V/div.
I
I
I
L
L
L
1A/div.
1A/div.
2A/div.
EN Shut Down
EN Shut Down
EN Shut Down
I
=0.1A
I
=1A
I
=3A
OUT
OUT
OUT
V
V
V
OUT
OUT
OUT
2V/div.
V
5V/div.
2V/div.
V
5V/div.
2V/div.
V
5V/div.
EN
EN
EN
V
V
SW
SW
10V/div.
V
10V/div.
SW
10V/div.
I
I
I
L
L
L
2A/div.
1A/div.
1A/div.
MP1586 Rev. 0.91
1/8/2010
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6
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