MIC2295 Micrel Semiconductor, MIC2295 Datasheet - Page 5

• Manufacturer Part Number: MIC2295
• Description: High Power Density 1.2A Boost Regulator
• Manufacturer: Micrel Semiconductor

July 2004
Micrel
90
85
80
75
70
65
60
300
250
200
150
100
MIC2295 12V output Efficiency
50
78
76
74
72
70
68
66
64
80
75
70
65
60
55
50
45
40
35
30
0
0
2.5
0
0
MIC2295 SEPIC 5V Output
5V MIC2295 SEPIC with one
OUTPUT CURRENT (mA)
vs. Supply Voltage
50
50
Switch Voltage
50
coupled inductor
OUTPUT CURRENT (mA)
4.5
Input Voltage (V)
LOAD CURRENT (mA)
100
100
100
150
6.5
150
200
Vin=3.3V
Vin=4.2V
Vin=3.6V
Vin=2.5
V
Vin=3.3
V
Vin=5V
150
Vin=3V
Vin=3.5V
Vin=4V
Vin=5V
Vin=5.5V
8.5
200
250
300
250
200
V
V
IN
I N
= 3.3V to 5.5V
= 3 .3 V to 5 .5 V
100
95
90
85
80
75
70
90
85
80
75
70
65
60
4. 4. 7 µF /
Max Duty Cycle vs Input Voltage
MIC2295 15V output Efficiency
6 .3 V
2.5
6.3V
C1
C1
0
F/
SUPPLY VOLTAGE (V)
OUTPUT CURRENT (mA)
4
50
Vin=3.3V
Vin=4V
Vin=4.2V
5.5
4
4
100
EN
EN
5
VIN
VI N
MIC2295BML
M IC2 2 9 5 BM L
7
5
5
4.7uH
4 .7 uH
150
G N D
GND
L1
L1
8.5
2
2
SW
L1 = Murata LQH32CN4R7M23
L2 = Murata LQH32CN4R7M23
SW
1uF/16V
200
1 uF /1 6 V
1
FB
10
1
FB
L 1 = Sum ida CLS 5 D1 1 /HP
C3
C3
3
3
4.7uH
4 .7 uH
L2
L1
MBRX140
M BRX1 4 0
1.30
1.28
1.26
1.24
1.22
1.20
1.18
1.16
1.14
1.12
1.10
1.5
1.3
1.1
0.9
0.7
0.5
-40 -20 0 20 40 60 80 100 120
43.2K
14.3K
R2
4 3 .2 K
1 4 .3 K
R1
R2
2.5
R1
SUPPLY VOLTAGE (V)
Feedback Voltage
vs. Supply Voltage
vs. Temperature
TEMPERATURE (°C)
4
Input Voltage
470pF/
4 7 0 pF /
C4
10V
C4
1 0 V
5.5
7
4.7uF/
V
V
4 .7 uF /
[phone]
6.3V
M9999-052402
OUT
C2
O U T
C 2
6 .3 V
= 5V @ 0.3A
8.5
= 5 V @ 0 .3 A
MIC2295
10