MIC28510EV Datasheet, PDF (3/14 Pages) Micrel Semiconductor – 75V/4A Hyper Speed Control™ Synchronous DC/DC Buck Regulator

Micrel, Inc.
MIC28510 4A Evaluation Board
MIC28510 0.8V to 5V/4A Evaluation Board Typical Characteristics
100
90
80
70
60
50
40
30
20
10
0
Efficiency (VIN = 48V)
vs. Output Current
fSW = 250kHz
5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
1.0V
0.9V
0.8V
1
2
3
4
5
6
OUTPUT CURRENT (A)
Thermal Derating
4
V_OUT = 3.3V
fsw = 250kHz
L = 10µH
3
T_{j_MAX} =125°C
2
V_IN = 75V
1
V_IN = 48V
V_IN = 5V
0
25
40
55
70
85
100
MAXIMUM AMBIENT TEMPERATURE
(°C)
Thermal Derating
4
V_IN = 8V
3
V_IN = 48V
2
V_IN = 75V
V_OUT = 5V
1
f_SW = 250kHz
L = 10µH
T_{j_MAX} = 125°C
0
25
40
55
70
85
100
MAXIMUM AMBIENT TEMPERATURE
(°C)
Thermal Derating
4
V_OUT = 5V
f_SW = 250kHz
3 ^{L = 10µH}
T_{j_MAX} = 125°C
V_IN =18V
2
1
V_IN = 24V
V_IN = 12V
0
25
40
55
70
85
100
MAXIMUM AMBIENT TEMPERATURE
(°C)
Thermal Derating
4
V_OUT = 3.3V
f_SW = 250kHz
3 ^{L = 10µH}
T_{j_MAX} = 125°C
V_IN = 12V
2
V_IN =18V
V_IN = 24V
1
0
25
40
55
70
85
100
MAXIMUM AMBIENT TEMPERATURE
(°C)
Thermal Derating
4
V_OUT = 2.5V
f_SW = 250kHz
3 ^{L = 10µH}
T_{j_MAX} = 125°C
V_IN = 12V
2
V_IN =18V
1
V_IN = 24V
0
25
40
55
70
85
100
MAXIMUM AMBIENT TEMPERATURE
(°C)
Die Temperature* : The temperature measurement was taken at the hottest point on the MIC28510 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.
March 2012
3
M9999-030712
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