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TC3682_05 PDF预览

TC3682_05

更新时间: 2024-11-05 03:28:47
品牌 Logo 应用领域
美国微芯 - MICROCHIP
页数 文件大小 规格书
10页 230K
描述
Inverting Charge Pump Voltage Doublers with Active Low Shutdown

TC3682_05 数据手册

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Obsolete Device  
TC3682/TC3683/TC3684  
Inverting Charge Pump Voltage Doublers with Active Low 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 TC3682/TC3683/TC3684 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 TC3682, 35kHz for the  
TC3683, and 125kHz for the TC3684. When the SHDN  
pin is held at a logic low, the device goes into a very low  
power mode of operation consuming less than 1μA  
(typ) of supply current.  
- 95μA (typ) for TC3682  
- 225μA (typ) for TC3683  
Low output source impedance (typically 120Ω), pro-  
vides output current up to 10mA. The TC3682/TC3683/  
TC3684 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 TC3684  
• Fully Compatible with 1.8V Logic Systems  
Applications  
• LCD Panel Bias  
• Cellular Phones PA Bias  
• Pagers  
The minimum external part count, small physical size  
and shutdown mode feature make this family of prod-  
ucts useful for a wide variety of negative bias power  
supply applications.  
• PDAs, Portable Data Loggers  
• Battery-Powered Devices  
Device Selection Table  
Functional Block Diagram  
Osc.  
Freq.  
(kHz)  
Operating  
Temp.  
Range  
Part  
Number  
Package  
C1+  
V
+
IN  
Input  
ON  
C1  
TC3682EUA 8-Pin MSOP  
TC3683EUA 8-Pin MSOP  
12  
35  
-40°C to +85°C  
-40°C to +85°C  
-40°C to +85°C  
C1–  
SHDN  
OFF  
C2+ TC3682  
TC3684EUA 8-Pin MSOP 125  
+
C2  
TC3683  
TC3684  
C2–  
Package Type  
V
= -(2 x V )  
IN  
OUT  
GND  
8-Pin MSOP  
V
OUT  
+
C
OUT  
C1–  
1
2
3
4
8
7
6
5
SHDN  
C1+  
C2+  
C2–  
OUT  
TC3682  
TC3683  
TC3684  
C1 must have a voltage rating V  
IN  
V
IN  
C2 and C  
must have a voltage rating 2V  
OUT  
IN  
V
GND  
© 2005 Microchip Technology Inc.  
DS21556C-page 1  

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