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参数资料
| 型号： | TC1221ECH |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHED CAPACITOR CONVERTER, 169 kHz SWITCHING FREQ-MAX, PDSO6 |
| 封装： | SOT-23A, 6 PIN |
| 文件页数： | 14/16页 |
| 文件大小： | 462K |
| 代理商： | TC1221ECH |
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 VIN) but will droop
at least by ROUT of the first device multiplied by the IQ
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 ROUT, 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
C2
6
4
3
4
1
2
1
3
C2
VIN
VOUT
VOUT =-nVIN
TC1221
TC1222
TC1221
TC1222
...
SHDN
VIN
5
"1"
"n"
+
C1
6
5
4
3
4
1
2
1
3
C2
VOUT
VOUT =-VIN
ROUT = ROUT OF SINGLE DEVICE
VIN
NUMBER OF DEVICES
TC1221
TC1222
TC1221
TC1222
...
SHDN
Shutdown
Control
5
6
VIN
+
"1"
"n"
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TC1221ECHTR | 功能描述:电荷泵 Hi Freq Switched CAP RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 输出电压:- 1.5 V to - 5.5 V, 3 V to 11 V 输出电流:100 mA 电源电流:1 mA 最大工作温度:+ 70 C 封装 / 箱体:SOIC-8 Narrow 封装:Tube |
| TC1222 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:High Frequency Switched Capacitor Voltage Converters with Shutdown in SOT Packages |
| TC1222ECH | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:High Frequency Switched Capacitor Voltage Converters with Shutdown in SOT Packages |
| TC1222ECHTR | 功能描述:电荷泵 Hi Freq Switched CAP RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 输出电压:- 1.5 V to - 5.5 V, 3 V to 11 V 输出电流:100 mA 电源电流:1 mA 最大工作温度:+ 70 C 封装 / 箱体:SOIC-8 Narrow 封装:Tube |
| TC12-22SRWA | 制造商:Kingbright Corporation 功能描述: |
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