MIC261203 Datasheet, PDF (9/31 Pages) Micrel Semiconductor – 28V, 12A Hyper Light Load™ Synchronous DC/DC Buck Regulator

Micrel, Inc.
Typical Characteristics (Continued)
100
95
90
85
80
75
70
65
60
55
50
0
Efficiency (V_IN = 12V)
vs. Output Current
5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
1.0V
0.9V
0.8V
V_IN = 12V
3
6
9
12
15
OUTPUT CURRENT (A)
IC Power Dissipation (V_IN = 12V)
vs. Output Current
4.5
V_IN = 12V
4.0 _{VOUT = 0.8V, 1.0V, 1.2V, 1.5V, 1.8V, 2.5V, 3.3V, 5.0V}
3.5
3.0
2.5
2.0
5.0V
1.5
0.8V
1.0
0.5
0.0
0
3
6
9
12
OUTPUT CURRENT (A)
Efficiency (V_IN = 24V)
vs. Output Current
95
90
5.0V
3.3V
85
2.5V
80
1.8V
75
1.5V
1.2V
70
1.0V
0.9V
65
0.8V
60
55
50
0
V_IN = 24V
3
6
9
12
15
OUTPUT CURRENT (A)
IC Power Dissipation (V_IN = 24V)
vs. Output Current
7
6
V_IN = 24V
V_OUT = 0.8V, 1.0V, 1.2V, 1.5V, 1.8V, 2.5V, 3.3V, 5.0V
5
4
3
5.0V
2
0.8V
1
0
0
3
6
9
12
OUTPUT CURRENT (A)
Thermal Derating*
vs. Ambient Temperature
18
16
0.8V
14
12
1.5V
10
8
6
V_IN = 5V
4 _{VOUT = 0.8, 1.2, 1.5V}
2
0
-50 -25
0
25 50
75 100 125
AMBIENT TEMPERATURE (°C)
Thermal Derating*
vs. Ambient Temperature
18
16
1.8V
14
12
3.3V
10
8
6
4 ^{VIN = 5V}
V_OUT = 1.8, 2.5, 3.3V
2
0
-50 -25
0
25 50 75 100 125
AMBIENT TEMPERATURE (°C)
MIC261203
Die Temperature* (V_IN = 12V)
vs. Output Current
100
80
60
40
V_IN = 12V
20
V_OUT = 1.8V
0
0
2
4
6
8
10
12
OUTPUT CURRENT (A)
Die Temperature* (V_IN = 24V)
vs. Output Current
140
120
100
80
60
40
V_IN = 24V
V_OUT = 1.8V
20
0
0
2
4
6
8
10
12
OUTPUT CURRENT (A)
Thermal Derating*
vs. Ambient Temperature
18
16
0.8V
14
12
1.8V
10
8
6
V_IN = 12V
4 _{VOUT = 0.8, 1.2, 1.8V}
2
0
-50 -25
0
25 50 75 100 125
AMBIENT TEMPERATURE (°C)
July 2011
9
M9999-071311-A