MAX851

PRODUCTION

Low-Noise, Regulated, Negative Charge Pump Power Supplies for GaAsFET Bias

1mVP-P Output Voltage Ripple (MAX853)

Data Sheet (Rev. 2) Product Selection Table
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Overview

  • Fixed -4.1V or Adjustable -0.5V to -9V Output at 5mA
  • 4.5V to 10V Input Voltage Range
  • 2mVP-P Output Voltage Ripple (MAX850-MAX852)
  • 1mVP-P Output Voltage Ripple (MAX853)
  • 100kHz Charge-Pump Switching Frequency (MAX850/MAX851/MAX853)
  • External Synchronizing Clock Input (MAX852)
  • Logic-Level Shutdown Mode: 1µA Max Over Temperature (MAX850/MAX852/MAX853)
  • Low Cost, 8-Pin SO Package
MAX851
Low-Noise, Regulated, Negative Charge Pump Power Supplies for GaAsFET Bias
MAX850, MAX851, MAX852, MAX853: Typical Operating Circuit
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Documentation

Data Sheet 1

Technical Articles 1

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Charge Pumps 1
MAX881R
PRODUCTION Low-Noise Bias Supply in µMAX with Power OK for GaAsFET PA
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Evaluation Kits

MAX850EVKIT

Evaluation Kit for the MAX850, MAX851, MAX852, MAX853

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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.

Applications

  • Cell Phones
  • Continuously Adjustable GaAsFET Bias
  • LCD-Bias Contrast Control
  • Negative Regulated Power Supplies
  • Personal Communicators, PDAs
  • Wireless Data Loggers
MAX850EVKIT
Evaluation Kit for the MAX850, MAX851, MAX852, MAX853

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