MP2492 MPS, MP2492 Datasheet - Page 5

• Manufacturer Part Number: MP2492
• Description: 2a, 55v, 100khz Step-down Converter With Programmable Output Current Limit
• Manufacturer: MPS

TYPICAL PERFORMANCE CHARACTERISTICS
C 1 =220uF, C 2 =2.2uF, C 3 =39uF, C 4 =22uF, L=39uH, T
MP2492 Rev. 1.0
12/20/2010
5.004
5.000
4.996
4.992
4.988
4.984
4.980
100
6.0
5.2
4.4
3.6
2.8
2.0
90
80
70
60
50
40
30
20
0.0
0.0
0
Efficiency vs. Load Current
Maximum I
Duty Cycle
V
Load Regulation
V
OUT
OUT
V
V
0.4
0.4
20
IN
=5V
V
IN
=5V
DUTY CYCLE ( % )
IN
=8V
=50V
V
=12V
IN
0.8
0.8
40
=50V
I
I
OUT
OUT
OUT
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
V
(A)
1.2
(A)
1.2
60
IN
MP2492 – 2A, 55V, 100kHz WITH PROGRAMMABLE OUTPUT CURRENT LIMIT
vs.
=8V
V
IN
1.6
=12V
1.6
80
2.0
100
2.0
3.310
3.306
3.302
3.298
3.294
3.290
-10
-20
-30
-40
-50
100
© 2010 MPS. All Rights Reserved.
50
40
30
20
10
90
80
70
60
50
40
30
20
0
0.0
0.0
Loop Gain with Phase Margin
V
Efficiency vs. Load Current
V
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Load Regulation
V
0.1
IN
OUT
OUT
=12V, V
V
V
0.4
0.4
=3.3V
V
=3.3V
IN
IN
FRE QUE NCY (kHz)
IN
Gain
=50V
=8V
=12V
OUT
1
V
0.8
I
0.8
OUT
I
IN
OUT
=5V, I
V
=50V
V
IN
(A)
10
IN
(A)
=12V
1.2
1.2
A
OUT
=8V
=25ºC，unless otherwise noted.
Phase
100
=1.8A
1.6
1.6
1000
2.0
2.0
-40
-80
-120
-160
-200
200
160
120
80
40
0
2.510
2.508
2.506
2.504
2.502
2.500
100
90
80
70
60
50
40
30
20
6
5
4
3
2
1
0
0
0.0
0.0
Efficiency vs. Load Current
Load Regulation
V
V
Current regulation
Sense to DCR
OUT
OUT
V
0.5
IN
0.4
V
=2.5V
=2.5V
0.4
IN
LOAD CURRENT ( A )
=50V
=12V
0.8
0.8
1
V
IN
I
I
OUT
OUT
V
=4.5V
V
IN
1.5
IN
1.2
1.2
=12V
(A)
=50V
(A)
1.6
1.6
2
2.5
2.0
2.0
5