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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： | 13/16页 |
| 文件大小： | 462K |
| 代理商： | TC1221ECH |
TC1221/TC1222
DS21367B-page 6
2002 Microchip Technology Inc.
Table 4-1 shows various values of C1 and the
corresponding output resistance values @ +25°C. It
assumes a 0.1
ESRC1 and 2 RSWITCH. Table 4-2
shows the output voltage ripple for various values of
C2. The VRIPPLE values assume 10mA output load
current and 0.1
ESRC2.
TABLE 4-1:
OUTPUT RESISTANCE
VS. C1 (ESR = 0.1
)
TABLE 4-2:
OUTPUT VOLTAGE RIPPLE
VS. C2 (ESR = 0.1
)
IOUT 10mA
4.4
Input Supply Bypassing
The VIN input should be capacitively bypassed to
reduce AC impedance and minimize noise effects due
to the internal switching of the device. The recom-
mended capacitor depends on the configuration of the
TC1221/TC1222.
4.5
Shutdown Input
The TC1221/TC1222 is enabled when SHDN is high,
and disabled when SHDN is low. This input cannot be
allowed to float. The SHDN input should be limited to
0.5V above VIN to avoid significant current flows.
4.6
Voltage Inverter
The most common application for charge pump
devices is the inverter (Figure 4-3). This application
uses two external capacitors: C1 and C2 (plus a power
supply bypass capacitor, if necessary). The output is
equal to -VIN plus any voltage drops due to loading.
Refer
to
Table 4-1
and
Table 4-2
for
capacitor
selection.
FIGURE 4-3:
VOLTAGE INVERTER
TEST CIRCUIT
C1 (
F)
TC1221
ROUT()
TC1222
ROUT()
0.22
52.9
22.6
0.33
40.8
20.5
0.47
33.5
19.4
1.0
25
17.8
C2 (
F)
TC1221
VRIPPLE (mV)
TC1222
VRIPPLE (mV)
0.22
184
32
0.33
123
22
0.47
87
16
1.0
42
9
3
2
4
5
1
C3
C1
C2
VIN
VOUT
RL
TC1221
TC1220
C1–
IN
OUT
C1+
GND
Device
C1
C2
C3
TC1221
1
F
1
F
1
F
TC1222
0.22
F
0.22
F
0.22
F
SHDN
6
+
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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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