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 1µA 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