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參數(shù)資料
| 型號(hào)： | TC1221ECH |
| 廠商： | Microchip Technology Inc. |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | High Frequency Switched Capacitor Voltage Converters with Shutdown in SOT Packages |
| 中文描述： | 高頻開關(guān)電容電壓轉(zhuǎn)換器與關(guān)機(jī)采用SOT封裝 |
| 文件頁(yè)數(shù)： | 7/16頁(yè) |
| 文件大?。?/td> | 462K |
| 代理商： | TC1221ECH |
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2002 Microchip Technology Inc.
DS21367B-page 7
TC1221/TC1222
4.7
Cascading Devices
Two or more TC1221/TC1222 can be cascaded to
increase output voltage (Figure 4-4). If the output is
lightly loaded, it will be close to (-2 x V
IN
) but will droop
at least by R
OUT
of the first device multiplied by the I
Q
of the second. It can be seen that the output resistance
rises rapidly for multiple cascaded devices.
4.8
Paralleling Devices
To reduce the value of R
OUT
, multiple TC1221/
TC1222
’
s can be connected in parallel (Figure 4-5).
The output resistance will be reduced by a factor of N
where N is the number of TC1221/TC1222. Each
device will require its own pump capacitor (C1), but all
devices may share one reservoir capacitor (C2).
However, to preserve ripple performance the value of
C2 should be scaled according to the number of
paralleled TC1221/TC1222.
FIGURE 4-4:
CASCADING MULTIPLE DEVICES TO INCREASE OUTPUT VOLTAGE
FIGURE 4-5:
PARALLELING MULTIPLE DEVICES TO REDUCE OUTPUT RESISTANCE
C1
C1
C2
6
5
6
5
4
3
4
1
2
2
1
3
C2
V
IN
V
OUT
V
OUT
= -nV
IN
TC1221
TC1222
TC1221
TC1222
. . .
. . .
SHDN
SHDN
V
IN
"1"
"n"
+
+
+
+
C1
C1
6
5
5
4
3
4
1
2
2
1
3
C2
V
OUT
V
OUT
= -V
IN
R
OUT
= R
OUT
OF SINGLE DEVICE
NUMBER OF DEVICES
V
IN
TC1221
TC1222
TC1221
TC1222
. . .
. . .
SHDN
SHDN
Shutdown
Control
6
V
IN
+
+
+
"1"
"n"
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TC1221ECHTR | 功能描述:電荷泵 Hi Freq Switched CAP 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 |
| TC1222 | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:High Frequency Switched Capacitor Voltage Converters with Shutdown in SOT Packages |
| TC1222ECH | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:High Frequency Switched Capacitor Voltage Converters with Shutdown in SOT Packages |
| TC1222ECHTR | 功能描述:電荷泵 Hi Freq Switched CAP 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 |
| TC12-22SRWA | 制造商:Kingbright Corporation 功能描述: |
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