参数资料
型号: MAX1778EUG+
厂商: Maxim Integrated Products
文件页数: 9/39页
文件大小: 0K
描述: IC DCDC CONV MULTI OUT 24TSSOP
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 62
应用: 转换器,TFT,LCD
输入电压: 2.7 V ~ 5.5 V
输出数: 5
输出电压: 2.7 V ~ 13 V
工作温度: 0°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 24-TSSOP(0.173",4.40mm 宽)
供应商设备封装: 24-TSSOP
包装: 管件
MAX1778/MAX1880–MAX1885
Quad-Output TFT LCD DC-DC
Converters with Buffer
Typical Operating Characteristics
(Circuit of Figure 1, V IN = +3.3V, SHDN = IN, V MAIN = V SUPP = V SUPN = V SUPB = V SUPL = 8V, BUF- = BUFOUT,
BUF+ = FLTSET = TGND = PGND = GND, T A = +25°C.)
8.12
MAIN 8V OUTPUT VOLTAGE
vs. LOAD CURRENT
100
MAIN 8V OUTPUT EFFICIENCY
vs. LOAD CURRENT
V IN = 5V
12.24
MAIN 12V OUTPUT VOLTAGE
vs. LOAD CURRENT
8.08
V IN = 3.3V
90
12.16
8.04
8.00
V IN = 5V
80
70
V IN = 3.3V
12.08
12.00
V IN = 3.3V
V IN = 5V
7.96
60
11.92
7.92
7.88
C INTG = 470pF
R COMP = 24k ?
C COMP = 470pF
50
40
V OUT = 8V
R COMP = 24k ?
C COMP = 470pF
C INTG = 470pF
11.84
11.76
FIGURE 8
C INTG = 470pF
0
200
400
600
800
0
200
400
600
800
0
100
200
300
400
500
600
100
I OUT (mA)
MAIN 12V OUTPUT EFFICIENCY
vs. LOAD CURRENT
I OUT (mA)
STEP UP CONVERTERS
SWITCHING FREQUENCY vs. INPUT VOLTAGE
1.20
I OUT (mA)
POSITIVE CHARGE-PUMP OUTPUT VOLTAGE
vs. LOAD CURRENT
20.2
90
80
V IN = 3.3V
V IN = 5V
1.15
1.10
1.05
MAX1778
20.0
19.8
V SUPP = 10V
70
1.00
V SUPP = 8V
60
0.95
19.6
V SUPP = 7.5V
50
40
FIGURE 8
V OUT = 12V
C INTG = 470pF
0.90
0.85
0.80
19.4
19.2
V SUPP = 7V
0
100
200
300
400
500
600
2.5
3.0
3.5
4.0
4.5
5.0
5.5
0
5
10
15
20
100
I OUT (mA)
POSITIVE CHARGE-PUMP EFFICIENCY
vs. LOAD CURRENT
40
V IN (V)
MAXIMUM POSITIVE CHARGE-PUMP
OUTPUT VOLTAGE vs. SUPPLY VOLTAGE
I POS (mA)
NEGATIVE CHARGE-PUMP OUTPUT VOLTAGE
vs. LOAD CURRENT
-4.90
90
V SUPP = 7V
V SUPP = 7.5V
35
-4.92
80
V SUPP = 8V
30
I POS = 1mA
-4.94
V SUPN = 6V
V SUPN = 7 V
70
25
-4.96
60
V SUPP = 10V
20
I POS = 10mA
-4.98
V SUPN = 8V
50
15
-5.00
40
30
V POS = 20V
10
5
-5.02
-5.04
0
5
10
15
20
2
4
6
8
10
12
14
0
10
20
30
40
I NEG (mA)
V SUPP (V)
I NEG (mA)
9
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