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TC3682

Microchip Technology
Part Number TC3682
Manufacturer Microchip Technology
Description (TC3682 - TC3684) Inverting Charge Pump Voltage Doublers
Published Feb 2, 2010
Detailed Description M Features • • • • • • • TC3682/TC3683/TC3684 General Description The TC3682/TC3683/TC3684 are CMOS charge pump convert...
Datasheet PDF File TC3682 PDF File

TC3682
TC3682

Overview
M Features • • • • • • • TC3682/TC3683/TC3684 General Description 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.
Low output source impedance (typically 120Ω), provides 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).
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.
Operating Temp.
Range -40°C to +85°C -40°C to +85°C -40°C to +85°C + C2 C2– Inverting Charge Pump Voltage Doublers with Active Low Shutdown 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 - 95µA (typ) for TC3682 - 225µA (typ) for TC3683 - 700µA (typ) for TC3684 • Fully Compatible with 1.
8V Logic Systems Applications • • • • • LCD Panel Bias Cellular Phones PA Bias Pagers PDAs, Portable Data Loggers Battery-Powered Devices Device Selection Table Part Number www.
DataSheet4U.
com TC3682EUA Package 8-Pin MSOP Osc.
Freq.
(kHz) 12 35 125 Functional Block Diagram + C1 C1+ C1– C2+ VIN SHDN Input ON OFF TC3683EUA 8-Pin MSOP TC3684EUA 8-Pin MSOP Package Type 8-Pin MSOP C1...


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