MIC2295_05 Datasheet, PDF (5/12 Pages) Micrel Semiconductor – High Power Density 1.2A Boost Regulator

Micrel
MIC2295 SEPIC 5V Output
78
76
74
72
70
Vin=3V
Vin=3.5V
68
Vin=4V
66
Vin=5V
Vin=5.5V
64
0
50
100
150
200
250
OUTPUT CURRENT (mA)
5V MIC2295 SEPIC with on
coupled inductor
80
75
70
65
60
55
50
45
Vin=2.5
40
V
Vin=3.3
35
V
Vin=5V
30
0
50
100 150 200 250 300
LOAD CURRENT (mA
MIC2295 12V output Efficiency
90
85
80
75
70
Vin=3.3V
Vin=4.2V
65
Vin=3.6V
60
0
50
100
150
200
OUTPUT CURRENT (mA)
Switch Voltage
vs. Supply Voltage
300
250
200
150
100
50
0
2.5
4.5
6.5
8.5
Input Voltage (V)
MIC2295
VIN = 3.3V to 5.5V
C1
F/
6.3V
C3
L1
4.7uH ^1uF/16V
MBRX140
5
1
VIN
SW
MIC2295BML
4 _EN
GND
2
3
FB
4.7uH
L2
R1
43.2K
R2
14.3K
VOUT = 5V @ 0.3A
C4
470pF/
10V
C2
4.7uF/
6.3V
V_IN = 3.5V to 5.5V
C1
4.7µF
6.3V
L1 = Murata LQH32CN4R7M23
L2 = Murata LQH32CN4R7M23
L1
C3
4.7µH 1µF/16V
MBRX140
5
1
VIN
SW
MIC2295BML
4 _EN
GND
3
FB
2
L1
4.7µH
R1
43.2k
R2
14.3k
V_OUT = 5V @ 0.3A
C4
470pF
10V
C2
4.7µF
6.3V
L1 = Sumida CL5DS 1 1/HP
Max Duty Cycle vs Input Voltage
100
95
90
85
80
75
70
2.5
4
5.5
7
8.5 10
SUPPLY VOLTAGE (V)
MIC2295 15V output Efficiency
90
85
80
75
70
Vin=3.3V
65
Vin=4V
Vin=4.2V
60
0
50
100
150
200
OUTPUT CURRENT (mA)
Input Voltage
vs. Supply Voltage
1.5
1.3
1.1
0.9
0.7
0.5
2.5
4
5.5
7
8.5
10
SUPPLY VOLTAGE (V)
Feedback Voltage
vs. Temperature
1.30
1.28
1.26
1.24
1.22
1.20
1.18
1.16
1.14
1.12
1.10-40 _{-20 0 20 40 60 80 100 120}
TEMPERATURE (°C)
April 2005
5
M9999-042605
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