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MIC24420 Datasheet(PDF) 6 Page - Micrel Semiconductor

Part No. MIC24420
Description  2.5A Dual Output PWM Synchronous Buck Regulator IC
Download  34 Pages
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Maker  MICREL [Micrel Semiconductor]
Homepage  http://www.micrel.com
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MIC24420 Datasheet(HTML) 6 Page - Micrel Semiconductor

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Micrel, Inc.
MIC24420/MIC24421
June 2012
6
M9999-062012-C
Typical Characteristics
UVLO vs Temperature
3.9
3.95
4
4.05
4.1
4.15
4.2
4.25
Operating Current vs Input
Voltage (O/P regulating)
5
10
15
20
25
30
35
40
45
3.85
-60
-40
-20
0
20
40
60
80
100
120
140
Temperature (°C)
UVLO rising
UVLO falling
0
4
6
8
10121416
Input Voltage (V)
MIC24420
MIC24421
VOUT1/2 = 1.2V/3.3V
No Load
Current Limit trip Voltage vs
Temperature
-20
-15
-10
-5
0
5
10
-60 -40 -20
0
20
40
60
80 100 120 140
TEMPERATURE (°C)
Enable and Switching Start
Thresholds vs. VIN
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
4
6
8
10
12141
VIN (V)
6
SW on
VDD on
VDD off
Regulation vs. Input Voltage
3.2
3.22
3.24
3.26
3.28
3.3
3.32
3.34
3.36
3.38
3.4
5
7
9
11
13
15
INPUT VOLTABE (V)
Regulation vs. Load
VIN = 12V
3.20
3.22
3.24
3.26
3.28
3.30
3.32
3.34
3.36
3.38
3.40
0
0.5
1
1.5
2
OUTPUT CURRENT (A)
VOUT = 3.3V
VIN = 12V
VIN = 12V
VOUT = 3.3V
Efficiency vs. Load
VIN = 5V
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
0
0.5
1
1.5
2
2.5
OUTPUT CURRENT (A)
VOUT = 3.3V
VOUT = 1.2V
VOUT = 0.7V
VIN = 5V
Efficiency vs. Load
VIN = 12V
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
0
0.5
1
1.5
2
2.5
OUTPUT CURRENT (A)
VOUT = 0.7V
VOUT = 1.2V
VOUT = 3.3V
VOUT = 5V
VIN = 12V
Current Sense Source Current
vs Temperature
165
175
185
195
205
215
225
-60 -40 -20
0
20
40
60
80 100 120 140
TEMPERATURE (°C)
VIN = 12V


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