GENERAL DESCRIPTION
The TCM850/1/2/3 combines an inverting charge pump and a low noise linear regulator in a single small outline package. They are ideal for biasing GaAS FETs in cellular telephone transmitter power amplifiers

FEATURES
■ Fixed – 4.1V or Adjustable – 0.5V to – 9V Output at 5mA
■ 4.5V to 10V Input Voltage Range
■ Low Output Voltage Ripple
    TCM850-852 .............................................. 2mVp-p
    TCM853...................................................... 1mVp-p
■ 100kHz Charge Pump Switching Frequency
■ Optional External Synchronizing Clock Input (TCM852)
■ Logic Level Shutdown Mode ................ 0.5µA Typ. Temperature (TCM850/852/853)
■ Low Cost, 8-Pin SOIC Package

APPLICATIONS
■ Cellular Phones
■ Negative Regulated Power Supplies
■ LCD Bias Contrast Control
■ Adjustable GaAs FET Bias
■ Wireless Data Loggers