MAX1776EUA 查看數據表（PDF） - Maxim Integrated
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MAX1776EUA Datasheet PDF : 13 Pages
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24V, 600mA Internal Switch, 100% Duty Cycle,
Step-Down Converter
Typical Operating Characteristics (continued)
(Circuit of Figure 1, components from Table 3, VIN = +12V, SHDN = IN, TA = +25°C.)
VOUTPUT vs. VIN,
CIRCUIT 1, VOUTPUT = 5V
0.4
0.2
ILOAD = 10mA
ILOAD = 1mA
0
-0.2
-0.4
ILOAD = 50mA
ILOAD = 500mA
-0.6
-0.8
1.0
5 7 9 11 13 15 17 19 21 23 25
VIN (V)
EFFICIENCY vs. ILOAD, CIRCUIT 5,
VOUTPUT = 3.3V
100
95
VIN = 6V
90
VIN = 12V
85
80
75
VIN = 15V VIN = 24V
70
65
60
55
50
0.10
1
10
100
1000
ILOAD (mA)
SWITCHING FREQUENCY vs.
LOAD CURRENT, CIRCUIT 1
200
180
VIN = 15V
160
140
120
100
VIN = 24V
80
60
VIN = 12V
40
20
0
0 100 200 300 400 500 600 700 800 900
ILOAD (mA)
VOUTPUT vs. VIN,
CIRCUIT 1, VOUTPUT = 3.3V
0.6
0.4
ILOAD = 10mA
0.2
ILOAD = 1mA
0
-0.2
-0.4
ILOAD = 50mA
-0.6
ILOAD = 500mA
-0.8
-1.0
-1.2
5 7 9 11 13 15 17 19 21 23 25
VIN (V)
EFFICIENCY vs. ILOAD, CIRCUIT 1,
VOUTPUT = 3.3V
100
95
90
VIN = 6V
85
80
75
VIN = 12V
VIN = 24V
70
65
60
55
50
0.10
1
10
100
1000
ILOAD (mA)
SWITCHING FREQUENCY vs.
VIN, CIRCUIT 1
140
120
ILOAD = 500mA
100
ILOAD = 375mA
80
60
ILOAD = 250mA
ILOAD = 5mA
40
ILOAD = 50mA ILOAD = 10mA
20
0
5
10
15
20
25
VIN (V)
EFFICIENCY vs. ILOAD, CIRCUIT 1,
VOUT = 5V
100
95
VIN = 6V
90
VIN = 12V
85
80
VIN = 15V
VIN = 24V
75
70
65
60
55
50
0.10
1
10
100
1000
ILOAD (mA)
EFFICIENCY vs. VIN, ILOAD = 500mA
100
95
CIRCUIT 5, 5V
90
CIRCUIT 1, 5V
85
80 CIRCUIT 1, 3.3V
75
CIRCUIT 5, 3.3V
70
65
60
55
50
7 8 9 10 11 12 13 14 15 16
VIN (V)
VOUTPUT ACCURACY vs. TEMPERATURE
1.5
1.0
0.5
0
-0.5
-1.0
-1.5
-40 -20
0 20 40 60
TEMPERATURE (°C)
80 100
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