The TC1225/1226/1227 are CMOS dual inverting charge pump voltage converters in 8-Pin MSOP packages. An onboard oscillator provides the clock, and only four external capacitors are required for full circuit implementation. Switching frequencies are 12kHz for the TC1225, 35kHz for the TC1226, and 125kHz for the TC1227. These devices provide both a negative voltage inversion (available at the VIN output) and a negative doubling voltage inversion (available at the 2 VIN output), with a low output impedance capable of providing output currents up to 5mA for the VIN output and 1mA for the 2VIN output. The input voltage can range from +1.8V to +5.5V.