MIC23030 Datasheet, PDF (4/17 Pages) Micrel Semiconductor – 8MHz PWM 400mA Buck Regulator with HyperLight Load

Micrel Inc.
Typical Characteristics
Efficiency V = 2.5V
OUT
100
90
V = 3.0V
IN
80
V = 3.6V
IN
70 V = 4.2V
IN
60
L = 0.47µH
C = 4.7µF
OUT
50
1
10
100
1000
OUTPUT CURRENT (mA)
Efficiency
with Various Inductors
100
90
80 ^{L = 1.0µH}
70
L = 0.47µH
60 L = 2.2µH
V_IN = 3.6V
COUT = 4.7µF
50
1
10
100
1000
OUTPUT CURRENT (mA)
Output Voltage
vs. Output Current
1.30
1.28
1.26
1.24
V = 4.2V
1.22 ^IN
V = 3.6V
IN
1.2
1.18
1.16
1.14
1.12
V = 1.2V
OUT
L = 0.47µH
C = 4.7µF
OUT
V = 3.0V
IN
1.10
1
10
100
1000
OUTPUT CURRENT (mA)
SW Frequency
vs. Inductance
10
8MHz
L = 2.2µH
1
L = 1µH
0.1
0.01
0.001
1
L = 0.47µH
V = 3.6V
IN
V = 1.8V
OUT
C = 4.7µF
OUT
10
100
1000
OUTPUT CURRENT (mA)
August 2008
Efficiency V = 1.8V
OUT
100
90 V = 3.0V
IN
V = 2.7V
IN
80
70 V = 3.6V
IN
V = 4.2V
IN
60
L = 0.47µH
C = 4.7µF
OUT
50
1
10
100
1000
OUTPUT CURRENT (mA)
Quiescent Current
vs. Input Voltage
40
35
30
25
20
15
10
Not switching
L = open
5
V = 1.2*V
OUT
nom
0
2.7 3.2 3.7 4.2 4.7 5.2 5.7
INPUT VOLTAGE (V)
Output Voltage
vs. Temperature
1.30
1.28
1.26
1.24
1.22
V = 1.2V
OUT
1.2
1.18
1.16
1.14
1.12
L = 0.47µH
C = 4.7µF
OUT
Load = 120mA
1.10
TEMPERATURE (°C)
SW Frequency
vs. Output Current
10
8MHz
1 V = 3.0V
IN
V = 3.6V
IN
0.1
0.01
1
V = 4.2V
IN
V = 1.8V
OUT
L = 0.47µH
C = 4.7µF
OUT
10
100
1000
OUTPUT CURRENT (mA)
4
MIC23030
Efficiency V = 1.2V
OUT
100
90
VIN = 2.7V
80 ^{VIN = 3.0V}
70
VIN = 4.2V
60 ^{VIN = 3.6V}
L = 0.47µH
COUT = 4.7µF
50
1
10
100
1000
OUTPUT CURRENT (mA)
Output Voltage
vs. Input Voltage
1.3
1.28
1.26
1.24 ^150mA _10mA
1.22
1mA
1.2
1.18
400mA
50mA
1.16 ^300mA
1.14
1.12
1.1
2.7 3.2 3.7
V = 1.2V
OUT
L = 0.47µH
C = 4.7µF
OUT
4.2 4.7 5.2 5.7
INPUT VOLTAGE (V)
Frequency
vs. Temperature
10.0
9.5
9.0
8.5
8.0
7.5
7.0
L = 0.47µH
C = 4.7µF
6.5
OUT
Load = 120mA
6.0
TEMPERATURE (°C)
Enable Threshold
vs. Input Voltage
1.2
1.1
1.0
Enable On
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
2.7 3.2 3.7 4.2 4.7 5.2 5.7
INPUT VOLTAGE (V)
M9999-082608-B