TCM851 Datasheet PDF | TelCom Semiconductor

TelCom Semiconductor TCM851

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 All four devices accept a range of input voltages from 4.5V to 10.0V and have – 5mA output current capability. The TCM850/1/2 have both preset (– 4.1V) and variable (– 0.5V to –9.0V) output voltages that program with an external resistor divider.

Part No.	TCM851
Datasheet	TCM851 Download
Manufacturer	TelCom Semiconductor
Description	REGULATED GaAs FET BIAS SUPPLY
Buy	Stock & Price

FEATURES

s s s 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

GENERAL DESCRIPTION

The TCM853 output voltage programs with an external positive control voltage. The TCM850/1/3 can be shutdown reducing quiescent current to less than 0.5µA (typ) over temperature, 2µA (typ) for the TCM851. 2 3 4 5 6 7 s s s s ORDERING INFORMATION

APPLICATIONS

s s s s s Cellular Phones Negative Regulated Power Supplies LCD Bias Contrast Control Adjustable GaAs FET Bias Wireless Data Loggers Part No. TCM850COA TCM850EOA TCM851COA TCM851EOA TCM852COA TCM852EOA TCM853COA TCM853EOA TCM850EV FUNCTIONAL BLOCK DIAGRAM + C1 + C1 Package 8-Pin SOIC 8-Pin SOIC 8-Pin SOIC 8-Pin SOIC Temp.