MIC23155 Datasheet, PDF (5/19 Pages) Micrel Semiconductor – 3MHz PWM 2A Buck Regulator with HyperLight Load and Power Good

Micrel Inc.
Typical Characteristics
100
90
80
70
60
50
40
30
20
10
0
1
Efficiency (V_OUT = 3.3V)
vs. Output Current
V IN=4.2V
V IN = 5.0V
COUT=4.7µF
L=1µH
10
100
1000
OUTPUT CURRENT (mA)
10000
1000000
VOUT Rise Time
vs. C_SS
100000
10000
1000
100
10
100
VOUTNOM = 1.8V
COUT = 4.7µF
1000 10000 100000 1000000
CSS (pF)
Shutdown Current
vs. Input Voltage
20
15
10
5
0
2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
100
90
80
70
60
50
40
30
20
10
0
1
Efficiency (VOUT = 2.5V)
vs. Output Current
V IN=5.0V
V IN= 4.2V
V IN=3.6V
COUT=4.7µF
L=1µH
10
100
1000
OUTPUT CURRENT (mA)
10000
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
2.5
Current Limit
vs. Input Voltage
V_OUTNOM = 1.8V
C_OUT = 4.7µF
3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
Line Regulation
(CCM)
2.00
1.95
1.90
1.85
IOUT = 1A
IOUT = 300mA
1.80
1.75
1.70
1.65
1.60
2.5
VOUTNOM = 1.8V
COUT = 4.7µF
3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
MIC23155
100
90
80
70
60
50
40
30
20
10
0
1
Efficiency (V_OUT = 1.8V)
vs. Output Current
VIN=2.7V
VIN=5.0V
VIN=4.2V
VIN=3.6V
C_OUT=4.7µF
L=1µH
10
100
1000
OUTPUT CURRENT (mA)
10000
40
35
30
25
20
15
10
5
0
2.5
Quiescent Current
vs. Input Voltage
T=25°C
T=125°C
T=-45°C
No Switching
SNS > V_OUTNOM * 1.2
C_OUT = 4.7µF
3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
2.00
1.95
1.90
1.85
1.80
1.75
1.70
1.65
1.60
2.5
Line Regulation
(HLL)
I_OUT = 80mA
I_OUT = 20mA
IOUT = 1mA
VOUTNOM = 1.8V
C_OUT = 4.7µF
3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
April 2011
5
M9999-041811-A