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參數(shù)資料
| 型號(hào)： | LM828 |
| 廠商： | National Semiconductor Corporation |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | Switched Capacitor Voltage Converter |
| 中文描述： | 開關(guān)電容電壓轉(zhuǎn)換器 |
| 文件頁數(shù)： | 7/8頁 |
| 文件大小： | 186K |
| 代理商： | LM828 |
Other Applications
(Continued)
Combined Doubler and Inverter
In Figure 5, the LM828 is used to provide a positive voltage
doubler and a negative voltage converter. Note that the total
current drawn from the two outputs should not exceed 40
mA.
Regulating V
OUT
It is possible to regulate the negative output of the LM828 by
use of a low dropout regulator (such as the LP2980). The
whole converter is depicted in Figure 6. This converter can
give a regulated output from 1.8V to 5.5V by choosing the
proper resistor ratio:
V
out
= V
ref
(1 + R
1
/R
2
)
where, V
ref
= 1.23V
Note that the following conditions must be satisfied simulta-
neously for worst case design:
V
in_min
>
V
out_min
+V
drop_max
(LP2980)
+ I
out_max
x R
out_max
(LM828)
V
in_max
V
out_max
+V
drop_min
(LP2980)
+ I
out_min
x R
out_min
(LM828)
DS100137-11
FIGURE 5. Combined Voltage Doubler and Inverter
DS100137-12
FIGURE 6. Combining LM828 with LP2980 to Make a Negative Adjustable Regulator
www.national.com
7
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM828M5 | 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 |
| LM828M5/NOPB | 功能描述:電荷泵 SWITCHED CAPACITOR VOLTAGE CONVERTER 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 |
| LM828M5/NOPB | 制造商:Texas Instruments 功能描述:DC/DC Charge Pump Converter (DC-DC) IC |
| LM828M5-NOPB | 制造商:TI 制造商全稱:Texas Instruments 功能描述:LM828 Switched Capacitor Voltage Converter |
| LM828M5X | 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 |
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