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TC2683

Microchip Technology
Part Number TC2683
Manufacturer Microchip Technology
Description (TC2682 - TC2684) Inverting Charge Pump Voltage Doublers
Published Mar 3, 2006
Detailed Description Obsolete Device TC2682/TC2683/TC2684 Inverting Charge Pump Voltage Doublers Features • • • • • • • Small 8-Pin MSOP Pac...
Datasheet PDF File TC2683 PDF File

TC2683
TC2683

Overview
Obsolete Device TC2682/TC2683/TC2684 Inverting Charge Pump Voltage Doublers Features • • • • • • • 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 TC2682 - 225μA (typ) for TC2683 - 700μA (typ) for TC2684 General Description The TC2682/TC2683/TC2684 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 TC2682, 35kHz for the TC2683, and 125kHz for the TC2684.
Low output source impedance (typically 120Ω), provides output current up to 10mA.
The TC2682/ TC2683/TC2684 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 and small physical size make this family of products useful for a wide variety of negative bias power supply applications.
Applications • • • • • LCD Panel Bias Cellular Phones PA Bias Pagers PDAs, Portable Data Loggers Battery-Powered Devices Device Selection Table Part Number TC2682EUA TC2683EUA TC2684EUA Package 8-Pin MSOP 8-Pin MSOP 8-Pin MSOP Osc.
Freq.
(kHz) 12 35 125 Operating Temp.
Range -40°C to +85°C -40°C to +85°C -40°C to +85°C Functional Block Diagram + C1 C1+ C1– C2+ + C2 C2– GND VOUT VIN Input TC2682 TC2683 TC2684 VOUT = -(2 x VIN) – C OUT + Package Type 8-Pin MSOP C1– C2+ C2– VOUT 1 2 3 4 8 NC C1+ VIN GND TC2682 TC2683 TC2684 7 6 5 C1 must have a voltage rating ≥ VIN C2 and COUT must have a voltage rating ≥ 2VIN © 2005 Microchip Technology Inc.
DS21548C-page ...


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