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The TC2682/TC2683/TC2684 are CMOS charge pumpconverters that provide an inverted doubled outputfrom a single posiTIve supply. An on-board oscillatorprovides the clock and only three external capacitorsare required for full circuit implementaTIon. Switchingfrequencies are 12kHz for the TC2682, 35kHz for theTC2683, 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 operaTIngvoltage range and high efficiency, which make them anideal choice for a wide variety of applicaTIons requiringa negative doubled voltage derived from a singlepositive supply (for example: generation of -7.2V froma +3.6V lithium cell or -10V generated from a +5V logicsupply).The minimum external part count and small physicalsize make this family of products useful for a widevariety of negative bias power supply applications.
