Micrel, Inc.
MIC28510 4A Evaluation Board
March 2012
7
M9999-030712
or (408) 955-1690
MIC28510 12V/4A Output Evaluation Board Typical Characteristics
Efficiency
vs. Output Current
50
55
60
65
70
75
80
85
90
95
100
0
1
2
3
4
5
6
E
F
FI
CI
E
NCY
(
%
)
Thermal Derating
0
1
2
3
4
25
40
55
70
85
100
115
V
OUT
= 12V
f
SW
=250kHz
L=27
μ
H
T
j_MAX
=125°C
18V
24V
30V
48V
75V
24V
IN
OUTPUT CURRENT (A)
V
OUT
= 12V
f
SW
= 250kHz
L = 27
μ
H
Maximum Ambient Temperature (°C)
Loa
d C
ur
re
nt
(A
)
18V
IN
48V
IN
75V
IN
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.
