MPQ28261 – 21V, 3A, 500kHz SYNCHRONOUS STEP-DOWN CONVERTER
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
Performance curves are tested on the evaluation board of the Design Example section.
VIN = 12V, VOUT = 1.2V, L = 2.8µH, TA = 25°C, unless otherwise noted.
Efficiency
VOUT=1.2V
100
Efficiency
VOUT=1.8V
100
Efficiency
VOUT=2.5V
100
90
80
70
60
50
40
30
20
10
0
90
80
70
60
50
40
30
20
10
0
90
80
70
60
50
40
30
20
10
0
VIN=4.5V
VIN=12V
VIN=21V
VIN=4.5V
VIN=12V
VIN=4.5V
VIN=12V
VIN=21V
VIN=21V
0
0.5
1
1.5
2
2.5
3 3.5
0
0.5
1
1.5
2
2.5
3 3.5
0
0.5
1
1.5
2
2.5
3
3.5
LOAD CURRENT (A)
LOAD CURRENT (A)
LOAD CURRENT (A)
Efficiency
VOUT=3.3V
100
90
80
70
60
50
40
30
20
10
0
VIN=4.5V
VIN=12V
VIN=21V
0
0.5
1
1.5
2
2.5
3 3.5
LOAD CURRENT (A)
MPQ28261 Rev. 1.12
10/10/2013
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