Note:This product has become 'Obsolete' and is no longer offered as a viable device.
The TC2682, TC2683 and 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 120 Ohms), provides output current up to 10mA. The TC2682, TC2683 and 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 parts count and small physical size make this family of products useful for a wide variety of negative bias power supply applications.
- 120 Ohms (typ.) Output Resistance
- 99% Voltage Conversion Efficiency
- Only 3 External Capacitors Required
- Power-Saving Shutdown Mode
- Low Active Supply Current
...............95 µ A (typ.) for TC2682
...............225 µ A (typ.) for TC2683
...............700 µA (typ.) for TC2684