Micrel, Inc.
MIC3201
R DSON
Thermal Shutdown
UVLO Threshold
400
350
300
250
200
vs. Input Voltage
180
160
140
120
100
80
vs. Input Voltage
ON
OFF
6.0
5.0
4.0
3.0
ON
vs. Temperature
OFF
150
60
2.0
100
50
0
I OUT = 1A @ 25°C
40
20
0
1.0
0.0
5
10
15
20
5
10
15
20
-40 -20
0
20
40
60
80 100 120
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
TEMPERATURE (°C)
60
50
40
T CASE @ 1.0A
vs. Input Voltage
1 LED
2.0
1.8
1.6
1.4
1.2
Supply Current
vs. Temperature
V IN = 12V
1.6
1.4
1.2
1.0
Enable Threshold
vs. Temperature
ON
OFF
30
20
10
1.0
0.8
0.6
0.4
0.2
0.8
0.6
0.4
0.2
0
5
10 15
INPUT VOTLAGE (V)
20
0.0
-40 -20
0 20 40 60 80 100 120
TEMPERATURE (°C)
0.0
-40 -20
0 20 40 60 80 100 120
TEMPERATURE (°C)
35
30
25
Shutdown Current
vs. Temperature
V IN = 12V
800
700
600
Switching Frequency
vs. Temperature
500
450
400
350
Low-Side MOSFET R DS(ON)
vs. Temperature
V IN = 12V
20
15
500
400
300
300
250
200
10
5
0
200
100
0
12V Input
R CS = 0.2 ?
L = 22μH
150
100
50
0
-40 -20
0
20 40 60
80 100 120
-40 -20
0
20
40 60 80 100 120
-40 -20
0
20
40 60 80 100 120
TEMPERATURE (°C)
VCC
TEMPERATURE (°C)
Current Sense Voltage
TEMPERATURE (°C)
7.0
6.0
vs. Temperature
250
200
vs. Temperature
V C(Max)
5.0
4.0
3.0
2.0
150
100
V CS(Min)
1.0
0.0
V IN = 12V
50
0
V HYS
-40 -20
0
20 40 60 80 100 120
-40 -20
0
20
40 60 80 100 120
TEMPERATURE (°C)
TEMPERATURE (°C)
February 2011
5
M9999-021011-B
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