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參數(shù)資料
| 型號： | LM2660MMX/NOPB |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHED CAPACITOR CONVERTER, 40 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | MINI, SO-8 |
| 文件頁數(shù)： | 13/13頁 |
| 文件大?。?/td> | 358K |
| 代理商： | LM2660MMX/NOPB |
Other Applications (Continued)
CASCADING DEVICES
Cascading the LM2660s (or LM2661s) is an easy way to
produce a greater negative voltage (as shown in Figure 5). If
n is the integer representing the number of devices cas-
caded, the unloaded output voltage V
out is (nVin). The
effective output resistance is equal to the weighted sum of
each individual device:
A three-stage cascade circuit shown in Figure 6 generates
3V
in, from Vin.
Cascading is also possible when devices are operating in
doubling mode. In Figure 7, two devices are cascaded to
generate 3V
in.
generating +15V or 15V from a +5V input.
Note that, the number of n is practically limited since the
increasing of n significantly reduces the efficiency and in-
creases the output resistance and output voltage ripple.
01291123
FIGURE 5. Increasing Output Voltage by Cascading Devices
01291124
FIGURE 6. Generating 3V
in from +Vin
LM2660/LM2661
www.national.com
9
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM2660MX | 功能描述:電荷泵 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 |
| LM2660MX/NOPB | 功能描述:電荷泵 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 |
| LM2661 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Switched Capacitor Voltage Converter |
| LM2661/3/4EVAL | 功能描述:電源管理IC開發(fā)工具 LM2661/3/4 EVAL BOARD RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| LM2661/3/4EVAL/NOPB | 功能描述:電源管理IC開發(fā)工具 LM2661/3/4 EVAL BRD RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
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