MIC26400_11 Datasheet, PDF (8/27 Pages) Micrel Semiconductor – 5A Hyper Speed Control Synchronous DC/DC Buck Regulator

Micrel, Inc.
Typical Characteristics (Continued)
Efficiency (VIN = 5V)
vs. Output Current
100
95
90
85
80
0
3.3V
2.5V
1.8V
1.5V
1.2V
1.0V
0.9V
0.8V
123 4567
OUTPUT CURRENT (A)
100
95
90
85
80
75
70
0
Efficiency (VIN = 12V)
vs. Output Current
5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
1.0V
0.9V
0.8V
1234567
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
10
1.8V
8
6
3.3V
4
2 ^{VIN = 5V}
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
2.5V
10
8
5V
6
4
2 ^{VIN = 12V}
V_OUT = 2.5, 3.3, 5V
0
-50 -25 0 25 50 75 100 125
AMBIENT TEMPERATURE (°C)
Thermal Derating*
vs. Ambient Temperature
12
10
0.8V
8
6
2.5V
4
2 ^VIN ^{= 24V}
VOUT = 0.8, 1.2, 2.5V
0
-50 -25
0
25 50 75 100 125
AMBIENT TEMPERATURE (°C)
MIC26400
Efficiency (VIN = 24V)
vs. Output Current
95
5.0V
90
3.3V
2.5V
1.8V
1.5V
85
1.2V
1.0V
80
0.9V
0.8V
75
70
01 23 45 67
OUTPUT CURRENT (A)
Thermal Derating*
vs. Ambient Temperature
14
12
0.8V
10
8
1.8V
6
4
2 ^{VIN = 12V}
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 MIC26400 case mounted on a 5 square inch 4 layer, 0.62”,
FR-4 PCB with 2oz finish copper weight per layer, see Thermal Measurement section. Actual results will depend upon the size of the PCB, ambient
temperature and proximity to other heat emitting components.
July 2011
8
M9999-070111-C