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参数资料
| 型号： | TC1219ECHTR |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHED CAPACITOR CONVERTER, 20 kHz SWITCHING FREQ-MAX, PDSO6 |
| 封装： | EIAJ, SC-74, SOT-23A, 6 PIN |
| 文件页数： | 14/16页 |
| 文件大小： | 482K |
| 代理商： | TC1219ECHTR |
2002 Microchip Technology Inc.
DS21366B-page 7
TC1219/TC1220
4.7
Cascading Devices
Two or more TC1219/TC1220 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 TC1219/
TC1220’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 TC1219/TC1220. 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 TC1219/TC1220.
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
TC1219
TC1220
TC1219
TC1220
...
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
TC1219
TC1220
TC1219
TC1220
...
SHDN
Shutdown
Control
5
6
VIN
+
"1"
"n"
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