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参数资料
| 型号： | TC1221ECHRT |
| 元件分类： | 稳压器 |
| 英文描述： | 0.05 A SWITCHED CAPACITOR CONVERTER, 169 kHz SWITCHING FREQ-MAX, PDSO6 |
| 封装： | SOT-23A, 6 PIN |
| 文件页数： | 5/9页 |
| 文件大小： | 101K |
| 代理商： | TC1221ECHRT |
5
TC1221/1222-2 5/4/00
TC1221
TC1222
High Frequency Switched Capacitor
Voltage Converters with Shutdown
in SOT Packages
Voltage Doubler/Inverter
Another common application of the TC1221/1222 is
shown in Figure 6. This circuit performs two functions in
combination. C1 and C2 form the standard inverter circuit
described above. C3 and C4 plus the two diodes form the
voltage doubler circuit. C1 and C3 are the pump capacitors
and C2 and C4 are the reservoir capacitors. Because both
sub-circuits rely on the same switches if either output is
loaded, both will droop toward GND. Make sure that the total
current drawn from both the outputs does not total more than
40 mA.
Diode Protection for Heavy Loads
When heavy loads require the OUT pin to sink large
currents being delivered by a positive source, diode protec-
tion may be needed. The OUT pin should not be allowed to
be pulled above ground. This is accomplished by connect-
ing a Schottky diode (1N5817) as shown in Figure 7.
Figure 5. Paralleling Multiple Devices to Reduce Output Resistance
Figure 6. Combined Doubler and Inverter
Figure 7. High V– Load Current
Layout Considerations
As with any switching power supply circuit, good layout
practice is recommended. Mount components as close
together as possible to minimize stray inductance and
capacitance.
Noise leakage into other circuitry can be
minimized with the use of a large ground plane.
C1
6
5
4
3
4
1
2
1
3
C2
V
OUT
V
OUT = –VIN
R
OUT =
R
OUT
OF SINGLE DEVICE
V
IN
NUMBER OF DEVICES
TC1221
TC1222
"1"
TC1221
TC1222
"n"
. . .
SHDN
Shutdown
Control
5
6
V
IN
TC1221
TC1222
GND
OUT
4
1
C1
D1
D2
D1, D2 = 1N4148
6
4
1
2
3
C2
C4
C3
V
IN
V
OUT = –VIN
V
OUT = (2VIN) –
(V
FD1) – (VFD2)
TC1221
TC1222
Shutdown
Control
5
相关PDF资料 |
PDF描述 |
|---|---|
| TC1221ECHTR | 0.05 A SWITCHED CAPACITOR CONVERTER, 169 kHz SWITCHING FREQ-MAX, PDSO6 |
| TC1225EUART | 0.01 A SWITCHED CAPACITOR CONVERTER, 12 kHz SWITCHING FREQ-MAX, PDSO8 |
| TC1232COERT | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO16 |
| TC1232EOETR | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO16 |
| TC1232EOA723 | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
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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