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參數(shù)資料
| 型號： | MAX668-MAX669 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | 1.8V to 28V Input, PWM Step-Up Controllers in レMAX |
| 中文描述： | 1.8V至28V輸入，PWM升壓控制器在レ最大 |
| 文件頁數(shù)： | 5/18頁 |
| 文件大?。?/td> | 326K |
| 代理商： | MAX668-MAX669 |
M
1.8V to 28V Input, PWM Step-Up
Controllers in μMAX
_______________________________________________________________________________________
5
50
60
65
70
75
80
85
90
95
1
10
100
1000
10,000
EFFICIENCY vs. LOAD CURRENT
(V
OUT
= 5V)
M
LOAD CURRENT (mA)
E
55
V
IN
= 3.3V
V
IN
= 3.6V
V
IN
= 2V
V
IN
= 2.7V
BOOTSTRAPPED
FIGURE 3
R4 = 200k
70
1
10,000
1000
10
100
MAX668 EFFICIENCY vs.
LOAD CURRENT (V
OUT
= 12V)
85
75
95
80
90
M
LOAD CURRENT (mA)
E
V
= 5V
NON-BOOTSTRAPPED
FIGURE 4
R4 = 200k
MAX668 EFFICIENCY vs.
LOAD CURRENT (V
OUT
= 24V)
M
LOAD CURRENT (mA)
E
70
1
10,000
1000
10
100
85
75
95
80
90
V
IN
= 8V
V
IN
= 5V
V
IN
= 12V
NON-BOOTSTRAPPED
FIGURE 4
R4 = 200k
0
1.5
1.0
0.5
2.0
2.5
3.0
0
400
300
LOAD CURRENT (mA)
100 200
500 600 700 800 900 1000
MAX669 MINIMUM START-UP VOLTAGE
vs. LOAD CURRENT
M
M
V
OUT
= 5V
V
OUT
= 12V
BOOTSTRAPPED
FIGURE 2
0
0.5
1.5
2.0
2.5
3.0
3.5
0
10
5
15
20
25
30
SHUTDOWN CURRENT vs.
SUPPLY VOLTAGE
M
SUPPLY VOLTAGE (V)
S
μ
A
1.0
CURRENT INTO V
CC
PIN
MAX668
MAX669
0
400
200
800
600
1000
1200
0
10
15
5
20
25
30
SUPPLY CURRENT vs.
SUPPLY VOLTAGE
M
SUPPLY VOLTAGE (V)
S
μ
A
MAX669
MAX668
CURRENT INTO V
CC
PIN
R
OSC
= 500k
0
500
1000
2000
2500
3000
3500
4000
0
4
2
6
8
10
12
NO-LOAD SUPPLY CURRENT vs.
SUPPLY VOLTAGE
M
SUPPLY VOLTAGE (V)
N
μ
A
1500
V
= 12V
BOOTSTRAPPED
FIGURE 2
R4 = 200k
150
190
210
170
250
230
270
290
-40
-20
0
20
40
60
80
100
SUPPLY CURRENT vs.
TEMPERATURE
M
TEMPERATURE (
°
C)
S
μ
A
R
OSC
= 100k
R
OSC
= 200k
R
OSC
= 500k
0.1
1
10
20
LDO DROPOUT VOLTAGE vs.
LDO CURRENT
M
LDO CURRENT (mA)
L
300
0
50
100
150
200
250
V
IN
= 3V
V
IN
= 4.5V
Typical Operating Characteristics
(Circuits of Figures 2, 3, 4, and 5; T
A
= +25°C; unless otherwise noted.)
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