MIC2174 Micrel Semiconductor, MIC2174 Datasheet - Page 5

• Manufacturer Part Number: MIC2174
• Description: Synchronous Buck Controller
• Manufacturer: Micrel Semiconductor

Micrel, Inc.
Typical Characteristics
September 2009
100
0.85
0.84
0.83
0.82
0.81
0.80
0.79
0.78
0.77
0.76
0.75
0.810
0.808
0.806
0.804
0.802
0.800
0.798
0.796
0.794
0.792
0.790
350
340
330
320
310
300
290
280
270
260
250
95
90
85
80
75
70
65
60
55
50
0
3
0
-40
Feedback Voltage vs. Load
7
-20
Switching Frequency
12V to 3.3V Efficiency
2
11
2
vs. HSD Voltage
Feedback Voltage
vs. Temperature
0
OUTPUT CURRENT (A)
OUTPUT CURRENT (A)
15
TEMPERATURE (°C)
HSD VOLTAGE (V)
20
4
4
19
40
23
6
6
60
27
VIN=5V
VOUT=1.8V
80
VIN=5V
31
VIN=5V
8
8
VIN=5V
100
35
120
39
10
10
90
85
80
75
70
65
60
55
50
45
40
0.85
0.84
0.83
0.82
0.81
0.80
0.79
0.78
0.77
0.76
0.75
350
340
330
320
310
300
290
280
270
260
250
350
340
330
320
310
300
290
280
270
260
250
0
-40
0
3
-20
Switching Frequency
Switching Frequency
2
24V to 1.8V Efficiency
3.5
2
Feedback Voltage
vs. Temperature
vs. Input Voltage
0
OUTPUT CURRENT (A)
OUTPUT CURRENT (A)
TEMPERATURE (°C)
INPUT VOLTAGE (V)
20
vs. Load
4
4
4
40
5
4.5
60
6
6
80
VHSD=24V
VIN=5V
VOUT=3.3V
VIN=5V
8
5
VIN=5V
8
100
120
5.5
10
10
90
85
80
75
70
65
60
55
50
45
40
0.85
0.84
0.83
0.82
0.81
0.80
0.79
0.78
0.77
0.76
0.75
350
340
330
320
310
300
290
280
270
260
250
0
3
150
135
120
105
3
90
75
60
45
30
15
0
0
Feedback Voltage Percentage
7
Current Limit Threshold vs.
Switching Frequency
10
3.5
2
24V to 3.3V Efficiency
Feedback Voltage
11
vs. Input Voltage
Feedback Voltage Percentage (%)
vs. HSD Voltage
20
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OUTPUT CURRENT (A)
15
INPUT VOLTAGE (V)
30
HSD VOLTAGE (V)
4
4
19
40
50
23
4.5
M9999-090409-B
6
60
27
VHSD=24V
VOUT=3.3V
70
31
VIN=5V
8
5
80
MIC2174
VIN=5V
35
90
39
100
5.5
10