参数资料
| 型号： | TC682EPA |
| 厂商： | Microchip Technology |
| 文件页数： | 6/14页 |
| 文件大小： | 0K |
| 描述： | IC REG SWITCHED CAP DBL INV 8DIP |
| 标准包装： | 60 |
| 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： | -4.8 V ~ -11 V |
| 输入电压： | 2.4 V ~ 5.5 V |
| 频率 - 开关： | 12kHz |
| 电流 - 输出： | 10mA |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 通孔 |
| 封装/外壳： | 8-DIP（0.300"，7.62mm） |
| 包装： | 管件 |
| 供应商设备封装： | 8-PDIP |
| 产品目录页面： | 664 (CN2011-ZH PDF) |
TC682
4.3
Paralleling Devices
4.4
-5V Regulated Supply From A
Paralleling multiple TC682s reduces the output
resistance of the converter. The effective output
resistance is the output resistance of a single device
divided by the number of devices. As illustrated in
and C 2 , but all can share a single reservoir capacitor.
Single 3V Battery
battery. The TC682 provides -6V at V OUT , which is
regulated to -5V by the negative LDO. The input to the
TC682 can vary from 3V to 5.5V without affecting
regulation appreciably. A TC54 device is connected to
the battery to detect undervoltage. This unit is set to
detect at 2.7V. With higher input voltage, more current
can be drawn from the outputs of the TC682. With 5V
at V IN , 10 mA can be drawn from the regulated output.
Assuming 150 Ω source resistance for the converter,
with I L– = 10 mA, the charge pump will droop 1.5V.
V IN
+
10 μ F
–
C 1 +
C 1 –
V IN
10 μ F
+
–
C 1 +
C 1 –
V IN
TC682
TC682
+
10 μ F
–
C 2 +
C 2 –
GND
V– OUT
+
10 μ F
–
C 2 +
C 2 –
GND
V– OUT
–
+
C– OUT 22 μ F
Negative
Supply
GND
FIGURE 4-2:
Paralleling TC682 for Lower Output Source Resistance
+
C 1 +
V IN
+
–
10 μ F
–
3V
+
10 μ F
–
C 1 –
C 2 +
C 2 –
TC682
V– OUT
V IN
V SS
V OUT
+
–
1 μ F
Ground
-5 Supply
–
GND
–
+ C
22 μ F
OUT
Negative LDO
Regulator
TC54VC2702Exx
V IN
V SS
V OUT
LOW BATTERY
FIGURE 4-3:
DS21453C-page 6
Negative Supply Derived from 3V Battery
? 2006 Microchip Technology Inc.
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