MIC2172 MICREL [Micrel Semiconductor], MIC2172 Datasheet - Page 6

• Manufacturer Part Number: MIC2172
• Description: 100kHz 1.25A Switching Regulators Preliminary Information
• Manufacturer: MICREL [Micrel Semiconductor]

MIC2172/3172
Typical Performance Characteristics
2.9
2.8
2.7
2.6
2.5
2.4
2.3
15
14
13
12
11
10
50
40
30
20
10
10
-100
-100
9
8
7
6
5
0
9
8
7
6
5
4
3
2
1
0
0.0
0
V
Switch Current = 1A
COMP
V
-50
-50
MIC2172 Minimum
Operating Voltage
IN
D.C. = 50%
0.5
Supply Current
D.C. = 90%
10
Supply Current
Supply Current
Switch Current (A)
Temperature ( C)
D.C. = 0%
Temperature ( C)
Operating Voltage (V)
= 90%
= 0.6V
0
0
1.0
20
50
50
= 50%
1.5
I SW = 0
30
100
100
150
150
2.0
40
800
700
600
500
400
300
200
100
120
110
100
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
90
80
70
60
-100
-100
0
8
7
6
5
4
3
2
1
0
0.0
-50
Feedback Bias Current
T J = 25 C
MIC3172
V
Oscillator Frequency
IN
-50
-50
Switch ON Voltage
(Shutdown Mode)
= 40V
Supply Current
Switch Current (A)
Temperature ( C)
Temperature ( C)
0
Temperature ( C)
0.5
4-18
0
0
T J = –40 C
50
T J = 125 C
50
50
1.0
100
100
100
150
150
150
1.5
140
130
120
110
100
90
-1
-2
-3
-4
-5
1.4
1.3
1.2
1.1
0.9
0.8
5
4
3
2
1
0
-100
1
0
1
4
3
2
1
0
0
25 C
Oscillator Frequency
MIC3172
Feedback Voltage
Enable Thresholds
-50
Line Regulation
10
20
T J = -40 C
V
–40 C
Temperature ( C)
10
IN
Current Limit
Duty Cycle (%)
125 C
Operating (V)
R
40
ADJ
0
20
OFF
T J = 125 C
ON
(k )
50
60
MIC2172
100
T J = 25 C
30
100
80
1000
40
150
100
Micrel
1997