MIC2204_05 Datasheet, PDF (4/11 Pages) Micrel Semiconductor – High-Efficiency 2MHz Synchronous Buck Converter

MIC2204
Typical Characteristics
Efficiency
vs. Output Current
100
95
90
4V_IN
85
80
75
3.5V_IN
70
3V_IN
65
60
55
1.8V_OUT
50
OUTPUT CURRENT (mA)
1.01
1.0075
1.005
1.0025
1
0.9975
0.995
0.9925
0.990
Output Voltage
vs. Output Current
0.1 0.2 0.3 0.4 0.5
OUTPUT CURRENT (A)
Bias Supply
vs. Temperature
2.32
2.318
2.316
2.314
2.312
2.31
2.308
2.306
2.304
2.30-240 _{-20 0 20 40 60 80 100 120}
TEMPERATURE (°C)
Frequency
vs. Temperature
2.40
2.30
2.20
2.10
2.00
1.90
1.80
1.70
1.6-040 _{-20 0 20 40 60 80 100 120}
TEMPERATURE (°C)
M9999-042205
100
95
90
85
80
75
70
65
60
55
500
Efficiency
vs. Output Current
4.2V_IN
3.3V_{IN 3.6VIN}
2.5V_OUT
100 200 300 400 500
OUTPUT CURRENT (mA)
Output Voltage
vs. Temperature
1.01
1.005
1
0.995
0.9-940 _{-20 0 20 40 60 80 100 120}
TEMPERATURE (°C)
Quiescent Current
vs. Supply Voltage
350
300
250
200
150
100
50
V_FB = 0V
00 _{1 2 3 4 5 6}
SUPPLY VOLTAGE (V)
Enable Threshold
vs. Supply Voltage
1
0.9
0.8
Enable On
0.7
0.6
Enable Off
0.5
0.4
0.3
0.2
0.1
20.3 2.8 3.3 3.8 4.3 4.8 5.3
SUPPLY VOLTAGE (V)
4
Micrel, Inc.
Efficiency
vs. Output Current
100
95
90
85
4.2V_IN
80
75
5V_IN
3.6V_IN
70
65
60
55
3.3V_OUT
500 _{100 200 300 400 500}
OUTPUT CURRENT (mA)
V_BIAS
vs. Supply Voltage
2.5
2.0
1.5
1.0
0.5
V_FB = 0V
00
2
4
6
SUPPLY VOLTAGE (V)
Quiescent Current
vs. Temperature
318
316
314
312
310
308
306
304
302
300
V_IN = 3.6V
29-840 _{-20 0 20 40 60 80 100 120}
TEMPERATURE (°C)
Enable Threshold
vs. Temperature
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
V_IN = 3.6V
-040 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
April 2005