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General Description

The TC1219/TC1220 are CMOS “charge-pump” voltage converters in ultra-small 6-Pin SOT-23A packages. They invert and/or double an input voltage which can range from +2.5V to +5.5V. Conversion efficiency is typically >95. Switching frequency is 12kHz for the TC1219, 35kHz for the TC1220. When the shutdown pin is held at a logic low, the device goes into a very low power mode of operation, consuming less than 1?A of supply current.

Features

? Charge Pumps in 6-Pin SOT-23A Package

? >95 Voltage Conversion Efficiency

? Voltage Inversion and/or Doubling

? Operates from +2.5V to +5.5V

? Up to 25mA Output Current

? Only Two External Capacitors Required

? Low Power Consumption

? Power-Saving Shutdown Mode

? TC1220 Compatible with 1.8V Logic Systems

Applications

? LCD Panel Bias

? Cellular Phones

? Pagers

? PDAs, Portable Dataloggers

? Battery-Powered Devices