MIC23150_0910 Datasheet, PDF (4/15 Pages) Micrel Semiconductor – 4MHz PWM 2A Buck Regulator with HyperLight Load

Micrel Inc.
Typical Characteristics
Efficiency
V = 1.8V
100
OUT
V = 2.7V
IN
V = 3.0V
IN
V = 3.6V
IN
90
80
70
60
50
400.1
V = 4.2V
IN
V = 5.0V
IN
V = 5.5V
IN
L = 1.0µH
C = 4.7µF
OUT
1 10 100 1000 10000
OUTPUT CURRENT (mA)
Current Limit
vs. Input Voltage
4.0
3.8
3.6
3.4
3.2
3.0
2.8
2.6
2.4 _{L = 1.0µH}
2.2 _{C = 4.7µF}
OUT
2.20.7 _{3.2 3.7 4.2 4.7 5.2 5.7}
INPUT VOLTAGE (V)
Output Voltage
vs. Input Voltage
2
1.95
1.9
1.85 ^{Load = 10mA}
1.8
Load = 100mA
1.75
Load = 1mA
1.7
1.65
1.26.7 _{3.2 3.7 4.2 4.7 5.2 5.7}
INPUT VOLTAGE (V)
Switching Frequency
vs. Temperature
4.5
4.4
4.3
4.2
4.1
4.0
3.9
V = 3.6V
3.8 ^IN
3.7
L =1.0µH
C = 4.7µF
3.6
OUT
LOAD
=
120mA
3.5
TEMPERATURE (°C)
Efficiency
V = 3.3V
100
OUT
V = 4.2V
90
IN
80
70
V = 5.0V
IN
60
V = 5.5V
IN
50 L = 1.0µH
C = 4.7µF
OUT
400.1 _{1 10}
100 1000 10000
OUTPUT CURRENT (mA)
Quiescent Current
vs. Input Voltage
40
35
30
25°C ^125°C
25
20
-40°C
15
10 _{Not Switching}
5
L=
V
open
= 1.2V
×
V
OUT
NOM
20.7 3.2 3.7 4.2 4.7 5.2 5.7
INPUT VOLTAGE (V)
Switching Frequency
vs Output Current
10
V = 3.0V
IN
1
V = 3.6V
IN
V = 4.2V
IN
0.1
0.01
0.0011
L = 1.0µH
V = 1.8V
OUT
C = 4.7µF
OUT
10 100 1000 10000
OUTPUT CURRENT (mA)
Output Voltage
vs. Temperature
1.85
1.84
1.83
1.82
1.81
1.80
1.79
1.78
1.77
L =1.0µH
C = 4.7µF
1.76
OUT
LOAD
=
120mA
1.75
TEMPERATURE (°C)
MIC23150
100
95
90
85
80
75
70
65
60
55
500.1
Efficiency with
Various Inductors
L = 0.68µH
L = 1.0µH
L = 1.5µH _{L = 2.2µH}
V = 3.6V
IN
V = 1.8V
OUT
C = 4.7µF
OUT
1 10 100 1000 10000
OUTPUT CURRENT (mA)
Output Voltage
vs. Input Voltage
2
1.95
1.9
1.85
Load = 200mA Load = 600mA
1.8
1.75 _{Load = 1000mA Load = 1500mA}
1.7
1.65
1.26.7 _{3.2 3.7 4.2 4.7 5.2 5.7}
INPUT VOLTAGE (V)
Output Voltage
vs Output Current
1.9
1.88
V = 5.5V
1.86
IN
V = 4.2V
1.84 ^IN
V = 3.6V
IN
1.82
1.8
1.78
V = 2.7V
IN
1.76 _{L = 1.0µH}
1.74 V = 1.8V
OUT
1.72 _{C = 4.7µF}
OUT
1.07.1 _{1 10}
100 1000 10000
OUTPUT CURRENT (mA)
Enable Thresold
vs. Temperature
1.2
ENABLE ON
VIN = 2.7V
1.0
VIN = 3.6V
VIN = 5.5V
0.8
ENABLE OFF
0.6
0.4
L = 1.0µH
0.2
C
OUT
=
4.7µF
0
TEMPERATURE (°C)
October 2009
4
M9999-102309-B