Features and Benefits

  • 4.5V to 10V Input Range
  • -4.1V Regulated Output
  • Less than 2mVp-p Output Voltage Ripple
  • 5mA Output Current
  • Surface-Mount Technology

Product Details

The MAX850-MAX853 ICs are inverting, charge-pump DC-DC converters with low-noise, regulated outputs. Their low output ripple voltage makes these devices ideal for biasing the GaAs FETs commonly found in cellular telephone transmitters.

The MAX850 evaluation kit (EV kit) is a fully assembled and tested surface-mount board. The board is shipped with a MAX850 mounted, but it can be replaced by the MAX851, MAX852, or MAX853. Provisions are made for mounting two additional resistors, which are required for output voltages other than -4.1V. A special scope-probe socket is also mounted on the board, so output noise can be observed on an oscilloscope.


  • Cell Phones
  • Continuously Adjustable GaAsFET Bias
  • LCD-Bias Contrast Control
  • Negative Regulated Power Supplies
  • Personal Communicators, PDAs
  • Wireless Data Loggers