MIC26903ZA_14 Datasheet, PDF (9/29 Pages) Micrel Semiconductor – 28V, 9A Hyper Speed Control Synchronous DC/DC Buck Regulator

Micrel, Inc.
MIC26903-ZA
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
VIN = 12V
2
4
6
8
10
12
OUTPUT CURRENT (A)
IC Power Dissipation (V_IN = 12V)
vs. Output Current
4.0
3.5
V_IN = 12V
V_OUT = 0.8V, 1.0V, 1.2V, 1.5V, 1.8V, 2.5V, 3.3V, 5.0V
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0
1.5
3
4.5
6
7.5
9
OUTPUT CURRENT (A)
Die Temperature* (V_IN = 12V)
vs. Output Current
100
80
60
40
VIN = 12V
20
VOUT = 1.8V
0
0
2
3
5
6
8
9
OUTPUT CURRENT (A)
Efficiency (V_IN = 24V)
vs. Output Current
95
5.0V
90
3.3V
2.5V
85
1.8V
1.5V
80
1.2V
75
1.0V
0.9V
70
0.8V
65
60
55
50
0
VIN = 24V
2
4
6
8
10
12
OUTPUT CURRENT (A)
IC Power Dissipation (V_IN = 24V)
vs. Output Current
4.5
4.0
V_IN = 24V
V_OUT = 0.8V, 1.0V, 1.2V, 1.5V, 1.8V, 2.5V, 3.3V, 5.0V
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0
1.5
3
4.5
6
7.5
9
OUTPUT CURRENT (A)
Die Temperature* (V_IN = 24V)
vs. Output Current
100
80
60
40
VIN = 24V
20
VOUT = 1.8V
0
0
2
3
5
6
8
9
OUTPUT CURRENT (A)
Thermal Derating*
vs. Ambient Temperature
14
12
0.8V
10
8
1.5V
6
4
VIN = 5V
2 ^{VOUT = 0.8, 1.2, 1.5V}
0
-50 -25 0 25 50 75 100 125
AMBIENT TEMPERATURE (°C)
Thermal Derating*
vs. Ambient Temperature
14
12
1.8V
10
8
3.3V
6
4
VIN = 5V
2 ^{VOUT = 1.8, 2.5, 3.3V}
0
-50 -25 0 25 50 75 100 125
AMBIENT TEMPERATURE (°C)
Thermal Derating*
vs. Ambient Temperature
14
12
0.8V
10
8
1.8V
6
4 _{VIN = 12V}
2 ^{VOUT = 0.8, 1.2, 1.8V}
0
-50 -25 0 25 50 75 100 125
AMBIENT TEMPERATURE (°C)
Die Temperature* : The temperature measurement was taken at the hottest point on the MIC26903-ZA while it was case mounted on a 5in² 4-layer,
0.62”, FR-4 PCB, with 2oz finish copper weight per layer. See the “Thermal Measurements” section for more details. Actual results will depend on the
size of the PCB, ambient temperature, and proximity to other heat emitting components.
July 22, 2014
9
Revision 1.1