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TC1682_05

更新时间： 2024-09-15 04:00:39
品牌 Logo 应用领域
美国微芯 - MICROCHIP 泵
页数 文件大小 规格书
10页 229K
描述
Inverting Charge Pump Voltage Doublers with Active High Shutdown

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TC1682_05 数据手册

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Obsolete Device  
TC1682/TC1683/TC1684  
Inverting Charge Pump Voltage Doublers with Active High Shutdown  
Features  
General Description  
• Small 8-Pin MSOP Package  
• Operates from 1.8V to 5.5V  
• 120 Ohms (typ) Output Resistance  
• 99% Voltage Conversion Efficiency  
• Only 3 External Capacitors Required  
• Power-Saving Shutdown Mode  
• Low Active Supply Current  
The TC1682/TC1683/TC1684 are CMOS charge pump  
converters that provide an inverted doubled output  
from a single positive supply. An on-board oscillator  
provides the clock and only three external capacitors  
are required for full circuit implementation. Switching  
frequencies are 12kHz for the TC1682, 35kHz for the  
TC1683, and 125kHz for the TC1684. When the SHDN  
pin is held at a logic high, the device goes into a very  
low power mode of operation consuming less than 1μA  
(typ) of supply current.  
- 95μA (typ) for TC1682  
- 225μA (typ) for TC1683  
Low output source impedance (typically 120Ω),  
provides output current up to 10mA. The TC1682/  
TC1683/TC1684 feature a 1.8V to 5.5V operating  
voltage range and high efficiency, which make them an  
ideal choice for a wide variety of applications requiring  
a negative doubled voltage derived from a single  
positive supply (for example: generation of -7.2V from  
a +3.6V lithium cell or -10V generated from a +5V logic  
supply).  
- 700μA (typ) for TC1684  
• Fully Compatible with 1.8V Logic Systems  
Applications  
• LCD Panel Bias  
• Cellular Phones PA Bias  
• Pagers  
• PDAs, Portable Data Loggers  
• Battery-Powered Devices  
The minimum external part count, small physical size  
and shutdown mode feature make this family of  
products useful for a wide variety of negative bias  
power supply applications.  
Device Selection Table  
Osc.  
Freq.  
(kHz)  
Operating  
Temp.  
Range  
Part  
Number  
Functional Block Diagram  
Package  
C1+  
C1–  
V
+
C1  
IN  
Input  
OFF  
TC1682EUA 8-Pin MSOP  
TC1683EUA 8-Pin MSOP  
TC1684EUA 8-Pin MSOP  
12  
35  
-40°C to +85°C  
-40°C to +85°C  
SHDN  
ON  
125 -40°C to +85°C  
C2+ TC1682  
+
C2  
TC1683  
Package Type  
TC1684  
C2–  
8-Pin MSOP  
V
= -(2 x V )  
IN  
OUT  
GND  
V
OUT  
–
+
C1–  
1
2
3
4
8
7
6
5
SHDN  
C1+  
C
OUT  
C2+  
C2–  
OUT  
TC1682  
TC1683  
TC1684  
V
IN  
C1 must have a voltage rating ≥ V  
IN  
C2 and C  
must have a voltage rating ≥ 2V  
OUT  
IN  
V
GND  
© 2005 Microchip Technology Inc.  
DS21537C-page 1  
1234567...10

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