MIC2295 Datasheet, PDF (5/13 Pages) Micrel Semiconductor – High Power Density 1.2A Boost Regulator

Micrel
MIC2295
MIC2295 SEPIC 5V Output
78
76
74
72
70
Vin=3V
68
Vin=3.5V
Vin=4V
66
Vin=5V
Vin=5.5V
64
0
50
100
150
200
250
OUTPUT CURRENT (mA)
5V MIC2295 SEPIC with one
coupled inductor
80
75
70
65
60
55
50
45
40
Vin=2.5
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)
VIN = 3.3V to 5.5V
C1
F/
6.3V
VI N =3 .3 V to5.5 V
C1
4. 7 µF/
6 .3V
C3
L1
4.7uH ^1uF/16V
MBRX140
VOUT = 5V @ 0.3A
5
1
VIN
SW
MIC2295BML
4 _EN
GND
2
3
FB
4.7uH
L2
R1
43.2K
C4
470pF/
10V
C2
4.7uF/
6.3V
R2
14.3K
L1 = Murata LQH32CN4R7M23
L2 = Murata LQH32CN4R7M23
C3
L1
4.7uH
1 uF/1 6V
M BRX1 4 0
5
1
VI N
SW
M IC2 2 9 5BM L
4 _EN
3
FB
GND
2
4.7 uH
L1
R1
4 3.2 K
R2
1 4.3 K
VOUT =5 V @0 .3 A
C4
4 7 0pF/
1 0V
C2
4 .7 uF/
6.3 V
L 1 = Sum ida CL5SD1 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)
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)
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)
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)
July 2004
5
M9999-052402
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