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參數(shù)資料
| 型號： | ICL7660 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Switched-Capacitor Voltage Converters(非穩(wěn)壓型，輸出電流10mA，輸出電壓-VIN，+2VIN，電荷泵電壓變換器) |
| 中文描述： | 開關(guān)電容電壓轉(zhuǎn)換器 |
| 文件頁數(shù)： | 10/12頁 |
| 文件大小： | 157K |
| 代理商： | ICL7660 |
M
Positive V oltage Doubler
Figure 9 illustrates the recommended voltage doubler
circuit for the MAX1044/ICL7660. To reduce the voltage
drops contributed by the diodes (V
), use Schottky
diodes. For true voltage doubling or higher output cur-
rents, use the MAX660.
V oltage Divider
The voltage divider shown in Figure 10 splits the power
supply in half. A third capacitor can be added between
V+ and V
OUT
.
Combined Positive Multiplic ation and
Negative V oltage Conversion
Figure 11 illustrates this dual-function circuit.
Capacitors C1 and C3 perform the bucket and reser-
voir functions for generating the negative voltage.
Capacitors C2 and C4 are the bucket and reservoir
capacitors for the doubled positive voltage. This circuit
has higher output impedances resulting from the use of
a common charge-pump driver.
Casc ading Devic es
Larger negative multiples of the supply voltage can be
obtained by cascading MAX1044/ICL7660 devices
(Figure 12). The output voltage is nominally V
= -n(V+)
where n is the number of devices cascaded. The out-
put voltage is reduced slightly by the output resistance
of the first device, multiplied by the quiescent current of
the second, etc. Three or more devices can be cascaded
in this way, but output impedance rises dramatically.
For example, the output resistance of two cascaded
MAX1044s is approximately five times the output resis-
tance of a single voltage converter. A better solution
may be an inductive switching regulator, such as the
MAX755, MAX759, MAX764, or MAX774.
S witc hed-Capac itor Voltage Converters
10
______________________________________________________________________________________
MAX1044
ICL7660
4
3
2
1
5
6
7
8
C2
10μF
C1
10μF
V+
V
OUT
= 1
2
LV
Figure 10. Voltage Divider
MAX1044
ICL7660
4
3
V
OUT
= 2(V+) - 2V
D
2
1
5
6
7
8
C4
C1
C2
V+
V
OUT
= -(V+)
C3
LV
Figure 11. Combined Positive and Negative Converter
MAX1044
ICL7660
4
3
2
1
5
6
7
8
MAX1044
ICL7660
4
3
2
1
5
6
7
8
10μF
10μF
V+
10μF
10μF
10μF
V
OUT
= -n(V+)
10μF
MAX1044
ICL7660
4
3
2
1
5
6
7
8
1
2
3
Figure 12. Cascading MAX1044/ICL7660 for Increased Output Voltage
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ICL7660 DIE | 制造商:Harris Corporation 功能描述: |
| ICL7660ACBA | 功能描述:電荷泵 CMOS VAGE CNVRTR COM RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube |
| ICL7660ACBA-T | 功能描述:電荷泵 CMOS VAGE CNVRTR COM TAPE RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube |
| ICL7660ACBAZ | 制造商:Intersil 功能描述:Bulk |
| ICL7660ACBAZA | 功能描述:電荷泵 W/ANNEAL CMOS VOLT CONVRTR 8 COM RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube |
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