MIC2253_11 Datasheet, PDF (4/13 Pages) Micrel Semiconductor – 3.5A 1MHz High Efficiency Boost Regulator with OVP and Softstart

Micrel, Inc.
Typical Characteristics
100
90
80
70
60
50
40
30
20
10
0
0
Efficiency VOUT = 3.8V
V I N = 3.3V
VIN=3V
V I N = 2.5V
L = 2.2µH
C = 22µF
TA = 25°C
600 1200 1800 2400
OUTPUT CURRENT (mA)
Efficiency VOUT=15.0V
90
80
70
V IN = 5V
60
V IN = 3.3V
VIN=4.2V
50
40
30
0
L = 2.2µH
C = 22µF
TA = 25°C
100 200 300 400 500 600 700
OUTPUT CURRENT (mA)
1500
1400
1300
1200
1100
1000
900
800
700
600
500
2.5
Frequency
vs. Input Voltage
VOUT = 12V
IOU T = 300mA
L = 2.2µH
C = 22µF
4.0 5.5 7.0 8.5 10.0
INPUT VOLTAGE (V)
Load Regulation
5.10
5.08
5.06
5.04
5.02
5.00
4.98
4.96
4.94
4.92
4.90
0
VOUT = 5V
L = 2.2µH
C = 22µF
TA = 25°C
400 800 1200 1600
OUTPUT CURRENT (mA)
April 2011
Efficiency VOUT=5.0V
90
80
70
VIN=4.5V
60
VIN=3.6V
VIN=2.5V
50
40
30
20
0
L = 2.2µH
C = 22µF
TA = 25°C
600 1200 1800 2400
OUTPUT CURRENT (mA)
Quiescent Current
vs. T emperature
17.0
16.5
16.0
15.5
15.0
14.5
14.0
13.5
13.0
12.5
12.0
VIN = 3.6V
VFB = 2.5V
Not Switching
-40 -20 0 20 40 60 80 100 120
T E M P E R AT U R E (°C )
Frequency
vs. T emperature
1200
1100
1000
900
800
700
V_OUT = 5V
V_IN = 3.6V
Load = 200mA
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
12.5
12.4
12.3
12.2
12.1
12.0
11.9
11.8
11.7
11.6
11.5
2.5
Line Regulation
VOUT = 12V
L = 2.2µH
C = 22µF
TA = 25°C
Load = 20mA
4.0 5.5 7.0 8.5 10.0
INPUT VOLTAGE (V)
4
MIC2253
Efficiency VOUT=12.0V
90
80
70
V IN = 5V
V IN = 4.2V
60
V IN = 3.3V
50
40
30
0
L = 2.2µH
C = 22µF
TA = 25°C
200 400 600 800 1000 1200
OUTPUT CURRENT (mA)
Quiescent Current
vs. Input Voltage
17.0
16.0
15.0
14.0
13.0
12.0
11.0
2.5
VFB = 2.5V
Not Switching
4.0 5.5 7.0 8.5 10.0
IN PUT VOLTAGE (V)
Feedback Voltage
vs. T emperature
1.30
1.29
1.28
1.27
1.26
1.25
1.24
1.23
1.22
1.21
1.20
VOUT = 5V
VIN = 3.6V
Load = 200mA
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
5.0
4.9
4.8
4.7
4.6
4.5
4.4
4.3
4.2
4.1
4.0
2.5
Current Limit
vs. Input Voltage
VOUT = 12V
L = 2.2µH
C = 22µF
TA = 25°C
4.0 5.5 7.0 8.5 10.0
INPUT VOLTAGE (V)
M9999-042011-C