MAX1802EHJ データシートの表示（PDF） - Maxim Integrated
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MAX1802EHJ Datasheet PDF : 28 Pages
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Digital Camera Step-Down
Power Supply
Typical Operating Characteristics
(Circuit of Figure 1, VVDDM = 6V, VVDDC = 3.3V, VONM = 3V, VONC = VON1 = VDCON2 = VDCON3 = 0, TA = +25°C, unless otherwise
noted.)
100
90
80
70
60
50
40
30
20
10
0
1
EFFICIENCY vs. LOAD CURRENT
(MAIN CONVERTER)
VIN = +5V
VIN = +7.2V
VIN = +11V
VOUT = 3.3V
10
100
1000
LOAD CURRENT (mA)
10,000
100
90
80
70
60
50
40
30
20
10
0
1
EFFICIENCY vs. LOAD CURRENT
(CORE CONVERTER)
VIN = +3.3V
VIN = +5V
VOUT = +2.5V
10
100
1000
LOAD CURRENT (mA)
100
90
80
70
60
50
40
30
20
10
0
1
EFFICIENCY vs. LOAD CURRENT
(MAIN CONVERTER)
VIN = +7.2V
VIN = +11V
VOUT = +5V
10
100
1000
LOAD CURRENT (mA)
10,000
MAXIMUM DUTY CYCLE vs. VDCON_
100
80
60
40
20
0
0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2
VDCON_ (V)
EFFICIENCY vs. LOAD CURRENT
(CORE CONVERTER)
100
90
80
70
VIN = +2.5V
60
VIN = +3.3V
50
VIN = +5V
40
30
20
10
VOUT = +1.8V
0
1
10
100
1000
LOAD CURRENT (mA)
DEFAULT MAXIMUM DUTY CYCLE
vs. FREQUENCY
100
COSC = 470pF
80
60
40
20
0
0
200 400 600 800 1000
FREQUENCY (kHz)
OSCILLATOR FREQUENCY
vs. ROSC
1000
SHUTDOWN CURRENT
vs. INPUT VOLTAGE
10
800
COSC = 470pF
8
COSC = 220pF
600
COSC = 100pF
6
COSC = 47pF
400
4
200
2
0
1
10
100
1000
ROSC (kΩ)
0
0
2
4
6
8 10 12
INPUT VOLTAGE (V)
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