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| 型号： | TCM828ECT713 |
| 厂商： | Microchip Technology |
| 文件页数： | 14/26页 |
| 文件大小： | 0K |
| 描述： | IC REG MULTI CONFIG ADJ SOT23A-5 |
| 产品变化通告： | Obsolescence 22/Feb/2011 |
| 标准包装： | 1 |
| 类型： | 切换式电容器（充电泵），倍增器，反相 |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | -1.5 V ~ -5.5 V，±3 V ~ ±11 V |
| 输入电压： | 1.5 V ~ 5.5 V |
| 频率 - 开关： | 12kHz |
| 电流 - 输出： | 25mA |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SC-74A，SOT-753 |
| 包装： | 标准包装 |
| 供应商设备封装： | SOT-23-5 |
| 产品目录页面： | 664 (CN2011-ZH PDF) |
| 其它名称： | TCM828ECT713DKR |
TCM828/TCM829
5.0.3
CAPACITOR SELECTION
5.0.5
VOLTAGE INVERTER
In order to maintain the lowest output resistance and
output ripple voltage, it is recommended that low ESR
capacitors be used. Additionally, larger values of C1 will
lower the output resistance and larger values of C2 will
reduce output ripple. (See Equation 5-1 ).
corresponding output resistance values @ +25°C. It
assumes a 0.1 Ω ESR C1 and 2 Ω R SW . Table 5-2 shows
The most common application for charge pump
devices is the inverter ( Figure 5-3 ). This application
uses two external capacitors – C1 and C2 (plus a
power supply bypass capacitor, if necessary). The
output is equal to V –IN plus any voltage drops, due to
loading. Refer to Table 5-1 and Table 5-1 for capacitor
selection.
the output voltage ripple for various values of C2. The
V RIPPLE values assume 10 mA output load current and
0.1 Ω ESR C2 .
C3
3.3 μF*
V OUT
IN
TABLE 5-1: OUTPUT RESISTANCE VS. C1
(ESR = 0.1 Ω )
C1 (μF) TCM828 R OUT ( Ω ) TCM829 R OUT ( Ω )
0.1 850 302
1 OUT
2
C1 +
5
C1
3.3 μF*
C2
3.3 μF*
R L
V OUT
1
3.3
100
42
45
25
3 C1 -
GND
4
10
25
19
47
100
18
17
17
17
Voltage Inverter
*10 μF ( TCM828 )
I
TABLE 5-2:
OUTPUT VOLTAGE RIPPLE
VS. C2 (ESR = 0.1 Ω ) IOUT
FIGURE 5-3:
Test Circuit.
10MA
5.0.6
CASCADING DEVICES
C2 (μF)
1
3.3
10
47
100
TCM828 V RIPPLE
(mV)
835
254
85
20
10
TCM829 R OUT ( Ω )
286
88
31
8
5
Two or more TCM828/829 devices can be cascaded to
increase output voltage ( Table 5-4 ). If the output is
lightly loaded, it will be close to (– 2 x VIN) but will droop
at least by R OUT 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. For large
negative voltage requirements see the TC682 or
TCM680 data sheets.
5.0.4 INPUT SUPPLY BYPASSING
The V IN input should be capacitively bypassed to
reduce AC impedance and minimize noise effects due
to the switching internal to the device. The
3 TCM828/
2
...
V +IN
3
TCM828/
2
5
recommended capacitor depends on the configuration
of the TCM828/TCM829 devices.
If the device is loaded from OUT to GND, it is
recommended that a large value capacitor (at least
equal to C1) be connected from the input to GND. If the
C1
4 TCM829
5 "1"
C1
1
4 TCM829
"n"
...
C2
1
V OUT
C2
device is loaded from IN to OUT, a small (0.1 μF)
capacitor is sufficient.
FIGURE 5-4:
V OUT = -nV IN
Cascading TCM828 or
TCM829 Devices to Increase Output Voltage.
DS21488B-page 14
? 2010 Microchip Technology Inc.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TCM828VT | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Switched Capacitor Voltage Converters |
| TCM828VT713 | 制造商:Microchip Technology Inc 功能描述: |
| TCM829 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Switched Capacitor Voltage Converters |
| TCM829ECT | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Switched Capacitor Voltage Converters |
| TCM829ECT713 | 功能描述:电荷泵 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 |
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