MIC23158 Datasheet, PDF (6/20 Pages) Micrel Semiconductor – 3MHz PWM Dual 2A Buck Regulator with HyperLight Load and Power Good

Micrel Inc.
Typical Characteristics
Efficiency (V_OUT = 3.3V) vs.
Output Current
100
90
80
70
VIN = 4.2V
VIN = 5V
60
50
40
30
20
10
0
1
COUT=4.7µF
L=1µH
10
100
1000
OUTPUT CURRENT (mA)
10000
Efficiency (V_OUT = 1.5V) vs.
Output Current
100
90
80
70
VIN = 3.6V
60 _{VIN = 2.7V}
50
VIN = 5V
VIN = 4.2V
40
30
20
10
0
1
COUT=4.7µF
L=1µH
10
100
1000
OUTPUT CURRENT (mA)
10000
60
55
50
45
40
35
30
25
20
2.5
Quiescent Current
vs. Input Voltage
T = 125°C
T = 25°C
T = -40°C
No Switching
SNS > VOUTNOM * 1.2
COUT = 4.7µF
3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
Efficiency (V_OUT = 2.5V) vs.
Output Current
100
90
80
70 VIN = 3.6V VIN = 4.2V
VIN = 5V
60
50
40
30
20
10
0
1
COUT=4.7µF
L=1µH
10
100
1000
OUTPUT CURRENT (mA)
10000
1000000
V_OUT Rise Time
vs. C_SS
100000
10000
1000
100
10
100
VOUT = 1.8V
COUT = 4.7µF
1000
10000 100000 1000000
CSS (pF)
Shutdown Current
vs. Input Voltage
1000
100
10
1
2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
MIC23158/9
Efficiency (V_OUT = 1.8V) vs.
Output Current
100
90
80
70 _{VIN = 2.7V VIN = 3.6V}
VIN = 5V
60
VIN = 4.2V
50
40
30
20
10
0
1
COUT=4.7µF
L=1µH
10
100
1000
OUTPUT CURRENT (mA)
10000
Current Limit
vs. Input Voltage
6.0
5.0
4.0
3.0
2.0
1.0
0.0
2.5
VOUT = 1.8V
COUT = 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)
November 2012
6
M9999-110812-A