MIC4681 Micrel Semiconductor, MIC4681 Datasheet - Page 5

• Manufacturer Part Number: MIC4681
• Description: 2A-Peak SuperSwitcher SOP-8 Buck Regulator
• Manufacturer: Micrel Semiconductor

Typical Characteristics
February 2001
MIC4681
5.05
5.03
5.01
4.99
4.97
4.95
205
203
201
199
197
195
14
12
10
80
60
40
20
8
6
4
2
0
0
0
0
0
0
MIC4681BM Frequency
MIC4681 3.3V Output
5
5
24Vin
5
vs. Supply Voltage
0.5
OUTPUT CURRENT (A)
Shutdown Current
vs. Input Voltage
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
Line Regulation
10 15 20 25 30 35
10 15 20 25 30 35
10
Efficiency
1
6Vin
15
I
Amb = 25 C
1.5
OUT
V
Amb = 25 C
Amb = 25 C
Amb = 25 C
20
SHDN
= 100mA
12Vin
2
= V
25
IN
2.5
30
5.05
5.03
5.01
4.99
4.97
4.95
215
210
205
200
195
190
185
100
6.6
6.4
6.2
5.8
80
60
40
20
-40 -20 0 20 40 60 80 100 120
-40 -20 0 20 40 60 80 100 120
6
0
0
0
V
V
IN
SHDN
5V Output Efficiency
= 12V
OUTPUT CURRENT (A)
OUTPUT CURRENT (A)
Shutdown Current
TEMPERATURE ( C)
vs. Temperature
Load Regulation
TEMPERATURE ( C)
vs. Temperature
0.5
0.5
= V
Frequency
IN
5
1.0
1.0
7Vin
Amb = 25 C
Amb = 25 C
V
V IN = 12V
IN
1.5
1.5
= 12V
12Vin
24Vin
2.0
2.0
1.238
1.236
1.234
1.232
1.230
1.228
1.226
1.224
1.222
100
100
90
80
70
60
50
40
30
20
10
80
60
40
20
-40 -20 0 20 40 60 80 100 120
0
6
5
4
3
2
1
0
0
0
0
0
V
Amb = 25 C
IN
12V Output Efficiency
0.5
5
OUTPUT CURRENT (A)
24Vin
= 12V
OUTPUT CURRENT (A)
Shutdown Current
Feedback Voltage
vs. Input Voltage
INPUT VOLTAGE (V)
TEMPERATURE ( C)
vs. Temperature
Characteristics
15Vin
10 15 20 25 30 35
Current Limit
0.5
1
1.5
V
Amb = 25 C
Amb = 25 C
SHDN
1
2
V
IN
= 12V
2.5
= 5V
MIC4681
1.5
3
Micrel