參數(shù)資料
型號(hào): MAX1802
廠商: Maxim Integrated Products, Inc.
英文描述: Digital Camera Step-Down Power Supply
中文描述: 數(shù)碼相機(jī)降壓型電源
文件頁數(shù): 9/28頁
文件大小: 469K
代理商: MAX1802
M
Digital Camera Step-Down
Power Supply
_______________________________________________________________________________________
9
100
0
1
10
100
1000
EFFICIENCY vs. LOAD CURRENT
(CORE CONVERTER)
20
M
LOAD CURRENT (mA)
E
40
60
50
80
70
30
10
90
V
IN
= +2.5V
V
IN
= +5V
V
IN
= +3.3V
V
OUT
= +1.8V
Typical Operating Characteristics
(Circuit of Figure 1, V
VDDM
= 6V, V
VDDC
= 3.3V, V
ONM
= 3V, V
ONC
= V
ON1
= V
DCON2
= V
DCON3
= 0, T
A
= +25
°
C, unless otherwise
noted.)
100
0
1
10
100
1000
10,000
EFFICIENCY vs. LOAD CURRENT
(MAIN CONVERTER)
20
M
LOAD CURRENT (mA)
E
40
60
50
80
70
30
10
90
V
OUT
= 3.3V
V
IN
= +5V
V
IN
= +7.2V
V
IN
= +11V
100
0
1
10
100
1000
10,000
EFFICIENCY vs. LOAD CURRENT
(MAIN CONVERTER)
20
M
LOAD CURRENT (mA)
E
40
60
50
80
70
30
10
90
V
OUT
= +5V
V
IN
= +7.2V
V
IN
= +11V
100
0
1
10
100
1000
EFFICIENCY vs. LOAD CURRENT
(CORE CONVERTER)
20
M
LOAD CURRENT (mA)
E
40
60
50
80
70
30
10
90
V
IN
= +5V
V
IN
= +3.3V
V
OUT
= +2.5V
0
20
60
40
80
100
0.4
0.6
0.7
0.5
0.8
0.9
1.0
1.1
1.2
MAXIMUM DUTY CYCLE vs. V
DCON
_
M
V
DCON
_ (V)
M
0
20
60
40
80
100
0
400
200
600
800
1000
DEFAULT MAXIMUM DUTY CYCLE
vs. FREQUENCY
M
FREQUENCY (kHz)
D
C
OSC
= 470pF
1000
0
1
10
100
1000
OSCILLATOR FREQUENCY
vs. R
OSC
200
M
R
OSC
(k
)
O
400
600
800
C
OSC
= 470pF
C
OSC
= 220pF
C
OSC
= 100pF
C
OSC
= 47pF
0
2
6
4
8
10
0
4
2
6
8
10
12
M
INPUT VOLTAGE (V)
S
μ
A
SHUTDOWN CURRENT
vs. INPUT VOLTAGE
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