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MIC2172YN Datasheet(PDF) 6 Page - Micrel Semiconductor

Part # MIC2172YN
Description  100kHz 1.25A Switching Regulators
PDF  17 Pages
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Manufacturer  MICREL [Micrel Semiconductor]
Direct Link  http://www.micrel.com
Logo MICREL - Micrel Semiconductor

MIC2172YN Datasheet(HTML) 6 Page - Micrel Semiconductor

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MIC2172/3172
Micrel, Inc.
M9999-042205
6
April 2005
2.3
2.4
2.5
2.6
2.7
2.8
2.9
-100
-50
0
50
100
150
Temperature (°C)
MIC2172 Minimum
Operating Voltage
Switch Current = 1A
0
100
200
300
400
500
600
700
800
-100
-50
0
50
100
150
Temperature (°C)
Feedback Bias Current
-5
-4
-3
-2
-1
0
1
2
3
4
5
010
20
3040
V
IN
Operating (V)
Feedback Voltage
Line Regulation
T
J
= -40°C
T
J
= 25°C
T
J
= 125°C
5
6
7
8
9
10
11
12
13
14
15
010
20
3040
V
IN Operating Voltage (V)
Supply Current
I
SW
= 0
D.C. = 90%
D.C. = 50%
D.C. = 0%
0
1
2
3
4
5
6
7
8
-100
-50
0
50
100
150
Temperature (°C)
Supply Current
(Shutdown Mode)
MIC3172
V
IN = 40V
0.8
0.9
1
1.1
1.2
1.3
1.4
-100
-50
0
50
100
150
Temperature (°C)
Enable Thresholds
ON
OFF
MIC3172
0
10
20
30
40
50
0.0
0.5
1.0
1.5
2.0
Switch Current (A)
Supply Current
δ = 90%
δ = 50%
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
0.0
0.5
1.0
1.5
Switch Current (A)
Switch ON Voltage
T
J
= 25°C
T
J
= 125°C
T
J
= –40°C
0
1
2
3
4
020
406080
100
Duty Cycle (%)
Current Limit
–40°C
25°C
125°C
0
1
2
3
4
5
6
7
8
9
10
-100
-50
0
50
100
150
Temperature (°C)
Supply Current
V
COMP = 0.6V
60
70
80
90
100
110
120
-50
0
50
100
150
Temperature (°C)
Oscillator Frequency
90
100
110
120
130
140
110
100
1000
R
ADJ (kΩ)
Oscillator Frequency
MIC2172
Typical Performance Characteristics



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