TC682
Inverting Voltage Doubler
Features: General Description: 99.9% Voltage Conversion Efficiency 92% Power Conversion Efficiency Wide Input Voltage Range:
-+2.4V to +5.5V Only 3 External Capacitors Required 185 пЃA Supply Current Space-Saving 8-Pin SOIC and 8-Pin PDIP
Packages The TC682 is a CMOS charge pump converter that
provides an inverted doubled output from a single
positive supply. An on-board 12 kHz (typical) oscillator
provides the clock and only 3 external capacitors are
required for full circuit implementation.
Low output source impedance (typically 140пЃ—),
provides output current up to 10 mA. The TC682 features low quiescent current and high efficiency, making
it the ideal choice for a wide variety of applications that
require a negative voltage derived from a single
positive supply (for example: generation of -6V from a
3V lithium cell or -10V generated from a +5V logic
supply). Applications: -10V from +5V Logic Supply
-6V from a Single 3V Lithium Cell
Portable Handheld Instruments
Cellular Phones
LCD Display Bias Generator
Panel Meters
Operational Amplifier Power Supplies The minimum external parts count and small physical
size of the TC682 make it useful in many mediumcurrent, dual voltage analog power supplies. Functional Block Diagram …