MAX756 Просмотр технического описания (PDF) - Maxim Integrated
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MAX756 Datasheet PDF : 9 Pages
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MAX756/MAX757
3.3V/5V/Adjustable-Output,
Step-Up DC-DC Converters
__________________________________________Typical Operating Characteristics
(Circuit of Figure 1, TA = +25°C, unless otherwise noted.)
EFFICIENCY vs. LOAD CURRENT
3.3V OUTPUT MODE
90
VIN = 2.0V
80
VIN = 1.2V
70
60
50
40
0.1
1M
1
10
100
1000
LOAD CURRENT (mA)
SWITCHING FREQUENCY
vs. LOAD CURRENT
100k
5V MODE
EFFICIENCY vs. LOAD CURRENT
5V OUTPUT MODE
90
VIN = 3.3V
80
VIN = 2.5V
70
VIN = 1.25V
60
50
40
0.1
500
400
1
10
100
1000
LOAD CURRENT (mA)
QUIESCENT CURRENT
vs. INPUT VOLTAGE
CURRENT MEASURED AT VIN
MAXIMUM OUTPUT CURRENT
vs. INPUT VOLTAGE
800
700
600
500
3.3V MODE
5V MODE
400
300
200
100
0
0
1
2
3
4
5
INPUT VOLTAGE (V)
SHUTDOWN QUIESCENT CURRENT
vs. INPUT VOLTAGE
50
CURRENT MEASURED AT VIN
40
10k
300
VOUT = 5V
30
1k
3.3V MODE
200
20
100
VIN = 2.5V
10
10μ 100μ 1m 10m 100m 1
LOAD CURRENT (A)
100
0
1
VOUT = 3.3V
2
3
4
5
INPUT VOLTAGE (V)
10
0
1
2
3
4
5
INPUT VOLTAGE (V)
MINIMUM START-UP INPUT VOLTAGE
vs. LOAD CURRENT
1.8
REFERENCE VOLTAGE
LOAD REGULATION
10
1.6
8
1.4
6
1.2
1.0
0.8
1
3.3V MODE
10
100
1000
LOAD CURRENT (mA)
4
2
VOUT = 3.3V
0
0
50 100 150 200 250
LOAD CURRENT (μA)
Maxim Integrated
3
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