MIC2267 Datasheet, PDF (5/19 Pages) Micrel Semiconductor – Input Current Limiting Synchronous Buck Regulator

Micrel Inc.
Typical Characteristics
Shutdown Current
vs. Input Voltage
100
90
V_EN = 0V
80
T_AMB = 25°C
70
60
50
40
30
20
10
0
2.5 3 3.5 4 4.5 5 5.5 6
INPUT VOLTAGE (V)
Supply Current
vs. Temperature
10
9
8
7
6
5
4
3
VEN = 1.8V
2
VIN = 5V
1
FSW = 1MHz
0
-50 -30 -10 10 30 50 70 90 110 130
TEMPERATURE (°C)
Enable Threshold
vs. Input Voltage
1.8
1.6
1.4
1.2
1
0.8
0.6
0.4
2.5
VEN HIGH
VEN LOW
3 3.5 4 4.5 5 5.5 6
INPUT VOLTAGE (V)
MOSFET RDS(ON)
vs. Input Voltage
180
160
140
120
100
80
60
40
I_OUT = 0.5A
20
T_AMB = 25°C
PMOS RDSon
NMOS RDSon
0
2.5 3 3.5 4 4.5 5 5.5 6
INPUT VOLTAGE (V)
January 2011
MIC2267
Shutdown Current
vs. Temperature
500
450
V_EN = 0V
400
V_IN = 5V
350
300
250
200
150
100
50
0
-60 -40 -20 0 20 40 60 80 100
TEMPERATURE (°C)
1.020
Reference Voltage
vs. Input Voltage
1.015
1.010
1.005
1.000
0.995
0.990
0.985
0.980
2.5
TAMB = 25°C
3 3.5 4 4.5 5 5.5 6
INPUT VOLTAGE (V)
Enable Threshold
vs. Temperature
1.8
1.6
1.4
1.2
1.0
0.8
VEN HIGH
0.6
VEN LOW
0.4
-50 -30 -10 10 30 50 70 90 110 130
TEMPERATURE (°C)
MOSFET RDS(ON)
vs. Temperature
160
140
120
100
80
60
40
20
I_OUT = 0.5A
V_IN = 5V
PMOS RDSon
NMOS RDSon
0
-50 -30 -10 10 30 50 70 90 110 130
TEMPERATURE (°C)
5
Supply Current
vs. Input Voltage
10
9
8
7
6
5
4
3
VEN = 1.8V
2
TAMB = 25°C
1
FSW = 1MHz
0
2.5 3 3.5 4 4.5 5 5.5 6
INPUT VOLTAGE (V)
1.020
Reference Voltage
vs. Temperature
1.015
1.010
1.005
1.000
0.995
0.990
0.985
0.980
VIN = 5V
-50 -30 -10 10 30 50 70 90 110 130
TEMPERATURE (°C)
Switching Frequency
vs. Temperature
1200
1150
1100
1050
1000
950
900
850
VIN = 5V
800
-50 -30 -10 10 30 50 70 90 110 130
TEMPERATURE (°C)
3.320
3.315
3.310
3.305
3.300
3.295
3.290
3.285
3.280
0
Output Voltage
vs. Output Current
VIN = 5.5V
VOUT = 3.3V
0.5
1
1.5
2
OUTPUT CURRENT (A)
M9999-011711-A