Datasheet

Micrel, Inc. MIC4680
March 2008 5
M9999-032808
Typical Characteristics
Line Regulation
4.96
4.97
4.98
4.99
5.00
5.01
5.02
5.03
5.04
5.05
5.06
0 5 10 15 20 25 30 35
)V(EGATLOVTUPTUO
INPUT VOLTAGE (V)
I
OUT
= 1.0A
4.96
4.98
5.00
5.02
5.04
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4
OUTPUT VOLTAGE (V)
OUTPUT CURRENT (A)
Load Regulatio
n
V
IN
= 12V
V
OUT
=5V
0
20
40
60
80
100
0 5 10 15 20 25 30 35
CURRENT (µA)
INPUT VOLTAGE (V)
Shutdown Current
vs. Input Voltage
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
-50 -25 0 25 50 75 100 125
CURRENT (µA)
TEMPERATURE (°C)
Shutdown Current
vs. Temperature
V
IN
=12V
V
SHDN
=V
IN
0
1
2
3
4
5
6
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8
OUTPUT VOLTAGE (V)
OUTPUT CURRENT (A)
Current Limit
Characteristic
V
IN
= 12V
196
197
198
199
200
201
202
0 5 10 15 20 25 30 35
FREQUENCY (kHz)
SUPPLY VOLTAGE (V)
Frequency vs.
Supply Voltage
180
190
200
210
220
-50 -25 0 25 50 75 100 125
FREQUENCY (kHz)
TEMPERATURE (°C)
Frequency vs.
Temperature
1.228
1.230
1.232
1.234
1.236
1.238
1.240
1.242
-50 -25 0 25 50 75 100 125 150
FEEDBACK VOLTAGE (V)
TEMPERATURE (°C)
Feedback Voltage
vs. Temperature
V
IN
=12V
V
OUT
=5V
I
OUT
=1A
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
-50 -25 0 25 50 75 100 125
SATURATION VOLTAGE (V)
TEMPERATURE (°C)
Saturation Voltage
vs. Temperature
V
IN
=12V
V
OUT
=5V
I
LOAD
=1A
0
10
20
30
40
50
60
70
80
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4
EFFICIENCY (%)
OUTPUT CURRENT (A)
3.3V Output
Efficiency
12V
6V
24V
0
10
20
30
40
50
60
70
80
90
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4
EFFICIENCY (%)
OUTPUT CURRENT (A)
5V Output
Efficiency
7V
12V
24V
0
10
20
30
40
50
60
70
80
90
100
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4
EFFICIENCY (%)
OUTPUT CURRENT (A)
12V Output
Efficiency
15V 24V