MIC23156 Datasheet, PDF (6/22 Pages) Micrel Semiconductor – 1.5A, 3MHz Synchronous Buck Regulator with HyperLight Load® and I2C Control for Dynamic Voltage Scaling

Micrel, Inc.
Typical Characteristics
100
90
80
70
60
50
40
30
20
10
0
10
Efficiency (V_OUT = 2.4V)
vs. Output Current
V_IN = 5V
V_IN = 4.2V
V_IN = 3.6V
C_OUT = 2.2µF
L = 1µH
100
1000
OUTPUT CURRENT (mA)
10000
Efficiency (V_OUT = 1.8V)
vs. Output Current
100
90
80
70
60
V_IN = 5V
V_IN = 4.2V
V_IN = 3.6V
V_IN = 2.7V
50
40
30
20
10
0
10
C_OUT = 2.2µF
L = 1µH
100
1000
OUTPUT CURRENT (mA)
10000
MIC23156
Efficiency (V_OUT = 1.0V)
vs. Output Current
100
90
80
70
60
50
V_IN = 5V
V_IN = 3.6V
V_IN = 2.7V
40
30
20
10
0
10
C_OUT = 2.2µF
L = 1µH
100
1000
OUTPUT CURRENT (mA)
10000
10000000
1000000
100000
10000
1000
100
10
100
V_OUT Rise Time
vs. C_SS
V_OUT = 1.0V
C_OUT = 2.2µF
1000 10000 100000 1000000
C_SS (pF)
45
40
35
30
25
20
15
10
2.5
Quiescent Current
vs. Input Voltage
25°C
125°C
-40°C
NO SWITCHING
V_OUT > V_OUTNOM * 1.2
C_OUT = 2.2µF
3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
3.2
3.1
3.0
2.9
2.8
2.7
2.6
2.5
2.5
Current Limit
vs. Input Voltage
T_A = 25°C
V_OUT = 1.0V
3
3.5
4
4.5
5
5.5
INPUT VOLTAGE (V)
30
25
20
15
10
5
0
2.5
Shutdown Current
vs. Input Voltage
V_OUT = 0V
C_OUT = 2.2µF
3
3.5
4
4.5
5
5.5
INPUT VOLTAGE (V)
Current Limit
vs. Temperature
3.2
3.1
3.0
2.9
2.8
2.7
2.6
2.5
-40 -20
V_IN = 3.6V
V_OUT = 1.0V
0 20 40 60 80 100 120
TEMPERATURE (°C)
Line Regulation
(CCM)
1.9
1.875
1.85
1.825
1.8
I_OUT = 1A
I_OUT = 1.5A
1.775
1.75
1.725
1.7
2.5
I_OUT = 300mA
V_OUTNOM = 1.8V
C_OUT = 2.2µF
3
3.5
4
4.5
5
5.5
INPUT VOLTAGE (V)
April 22, 2013
6
Revision 1.0